JP2001266452A - Magnetic disk unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic disk unit which can execute processing, such as contact retrieval and thumbnail display with low power consumption by shortening the time for accessing a magnetic disk and improving data transfer efficiency without starting the magnetic disk even if there is a request for the content retrieval and thumbnail display of the contents recorded after recording and reproducing or when the powder is turned on. SOLUTION: The frame data of the contents to be recorded and reproduced in a frame data detecting section 4 is detected. Position information is stored and held in a position information management section 3 and the frame data and its position information as well as the operating condition of the magnetic disk device 10 are kept stored onto a flush memory 5 by a control section 6 and are previously read out into a buffer memory 7 when the power source is turned on.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a magnetic disk device which uses a magnetic disk as a recording medium and is known as a mass storage device, and a data access method therefor.

[0002]

2. Description of the Related Art Conventionally, in a computer system for controlling and managing OA equipment, industrial equipment, and the like, as information data to be handled is increased, a large capacity is required as a storage device for recording the information data. As a large-capacity storage device for satisfying the demand, a magnetic disk device using a magnetic disk as a recording medium is widely used.

In such a magnetic disk drive, as a basic operation for transferring data to and from a higher-level device connected to the outside, every time power is turned on regardless of the previous operation state of the magnetic disk drive. The magnetic disk device is initialized, the magnetic disk of the magnetic disk device rotates normally, and the magnetic head is sought to a predetermined position on the magnetic disk. Notify that

[0004] The higher-level device that has received the notification accesses the magnetic disk device in order to ascertain the current recording contents of the magnetic disk device, reads necessary information from the system area on the magnetic disk, and stores the information in the information. A data transfer process is started based on the instruction, and an instruction is issued.

The magnetic disk device starts accessing the magnetic disk after receiving the command from the higher-level device, and, based on the command issued from the higher-level device, the physical data on the magnetic disk requested by the higher-level device to access. The head is sought to an arbitrary track of the magnetic disk in the magnetic disk device in accordance with the calculated information, and the data requested by the host device is read and written.

The operation of such a conventional magnetic disk drive will be described below mainly on its operation. FIG. 10 is a diagram for explaining the operation of the magnetic disk device, and shows a process when the magnetic disk device enters a ready state after the power is turned on and the host device accesses the magnetic disk device. .

In step (S9-1) of FIG. 10, power is turned on to the magnetic disk drive. When the power is turned on, in step (S9-2), the magnetic disk device starts initialization and the magnetic disk starts rotating. In step (S9-3), the magnetic disk device waits for the magnetic disk to rotate normally, seeks the magnetic head to a predetermined position on the magnetic disk, and then the magnetic disk device is ready for the host device. Notify that the status has been reached. During this time, the host device is waiting for a notification of the ready state from the magnetic disk device. In step (S9-4), the higher-level device that has received the notification accesses the magnetic disk device in order to grasp the current recording contents of the magnetic disk device, and obtains necessary information (recorded information) from the system area on the magnetic disk. The data size, recording start and end positions, recording date and time) are read out in advance. Step (S9-
In 5), the host device can grasp the current contents of the magnetic disk device based on the information read in step (S9-4), and start access to the magnetic disk device for reproduction or recording. .

When all accesses have been completed and the use of the magnetic disk device is to be stopped, the supply of power to the magnetic disk device is stopped in step (S9-6), and the magnetic disk device stops operating. When the use of the magnetic disk device is started again, the step (S9-
Returning to 1), the power is turned on. Thereafter, the magnetic disk device proceeds to step (S9-2) irrespective of the previous operation state (the operation state of the magnetic disk device before the supply of power was stopped last time, for example, reproduction), and starts initialization.

[0009]

However, the conventional magnetic disk drive as described above has no means for recognizing the previous operation state of the magnetic disk drive or the content recorded on the magnetic disk, and the power supply is not used. The above-described operation is performed every time the power is turned on.

Therefore, when a content search (a large volume of continuous data such as video data) recorded on the magnetic disk is performed or a thumbnail display is performed in the host device when the power is turned on, the power is supplied to the magnetic disk device. Is entered, initialization is started, the magnetic disk drive enters a ready state, this is notified to the upper-level device, and the higher-level device recognizes it and grasps the current recording contents of the magnetic disk. To read necessary information (size of recorded data, recording start and end positions, recording date and time) from the system area on the magnetic disk,
After the magnetic head seeks to the position where the content on the magnetic disk is recorded based on the information, the content required for the higher-level device is read, so it takes time for the content search and the thumbnail display on the higher-level device. Sisters,
There is a problem that data transfer efficiency is not improved.

[0011] Then, the magnetic disk must be started only for content search and thumbnail display, and there is a problem that power consumption increases. The present invention reduces the time required to access the magnetic disk without starting up the magnetic disk, even if there is a request to search the contents of the recorded content or to display a thumbnail after recording / reproduction or when the power is turned on, thereby improving the data transfer efficiency. It is an object of the present invention to provide a magnetic disk drive capable of performing content search and thumbnail display processing with low power consumption.

[0012]

In order to solve the above-mentioned problems, a magnetic disk apparatus and a data access method according to the present invention provide a content (a large capacity continuous data such as video data) reproduced or recorded on a magnetic disk. Buffer memory capable of storing a plurality of data frame data, a read / write control unit for reproducing and recording the content on the magnetic disk, and position information indicating a physical position of the content on the magnetic disk Position information detecting means for detecting frame data, frame data detecting means for detecting frame data of the content when reproducing the content on the magnetic disk or recording the content on the magnetic disk, and information of the content ( Data size, recording start and end positions, recording date and time, recording time and A non-volatile storage device (such as a flash memory) for storing the detected frame data, the position information on the magnetic disk corresponding to the frame data, and the operating state of the magnetic disk device; A control unit for performing a seek control on the head, giving a read command and a write command for data on the magnetic disk to the read / write control unit, and controlling the nonvolatile storage device; At the time of reproducing the content on the magnetic disk or recording the content on the magnetic disk, when frame data of the content is detected, information (data) of the content currently being reproduced or recorded. Size, recording start and end position, recording date and time, recording time and playback date And the current operation state (reproduction or recording) of the magnetic disk device and the frame data corresponding to the detected frame data, the detected frame data, and the frame data. At the next power-on,
The data stored in the non-volatile storage device is read in advance into the buffer memory without waiting for the magnetic disk device to be in a ready state, and without rotating the magnetic disk or seeking the magnetic head. By doing so, the processing time for content search and thumbnail display of the content recorded on the magnetic disk is shortened, and the data transfer efficiency is improved.

According to the present invention, the data transfer efficiency can be reduced without activating the magnetic disk even when there is a request to search the contents of the content recorded on the magnetic disk device or to display a thumbnail when the power of the magnetic disk device is turned on. It is possible to provide a magnetic disk device and a data access method thereof that can perform content search and thumbnail display processing with low power consumption without lowering.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A magnetic disk drive according to a first aspect of the present invention is a magnetic disk drive for accessing a magnetic disk and reading / writing data of various types of information. Information (large recorded continuous data such as video data) (recorded data size, recording start and end positions on a magnetic disk, recording date and time, recording time), a plurality of frame data in the content, and the frame data Means for storing, in a non-volatile storage device (such as a flash memory), position information on the magnetic disk and an operation state of the magnetic disk device corresponding to the above.

According to a second aspect of the present invention, there is provided a data access method for a magnetic disk drive, in a magnetic disk drive using a magnetic disk as a recording medium, for accessing the magnetic disk and reading and writing various information data. Information (contents of recorded data, recording start and end positions on the magnetic disk, recording date and time, recording time) of contents (large-capacity continuous data such as video data) recorded on the magnetic disk; A plurality of frame data in the content, position information on the magnetic disk corresponding to the frame data, and an operation state of the magnetic disk device are stored in a non-volatile storage device (flash memory or the like), and the magnetic disk is not accessed. To read data from the nonvolatile storage device or turn off the system power supply once. If it characterized by reading data from the nonvolatile memory device without waiting for completion initialization of the magnetic disk.

The recording medium according to the third aspect of the present invention uses a magnetic disk as a recording medium, and records a control program for a magnetic disk device that accesses the magnetic disk and reads and writes various information data. A recording medium, wherein a data access control program required to execute the data access method according to claim 2 is recorded.

According to this configuration and method, when there is a request to search the contents of the content recorded in the magnetic disk device or to display a thumbnail, the time required to access the magnetic disk is reduced, and when the power is turned on, the magnetic disk device is in the ready state. By reading data stored in the non-volatile storage device without waiting for the start of the operation and without activating the magnetic disk, it is possible to realize a magnetic disk device with low power consumption and improved data transfer efficiency.

A magnetic disk drive according to a fourth aspect of the present invention is a magnetic disk drive for accessing a magnetic disk and reading and writing various information data, wherein the content (such as video data) recorded on the magnetic disk is read. (Large-capacity continuous data) (recorded data size, recording start and end positions on the magnetic disk, recording date and time, recording time), and a plurality of frame data including the beginning of the content and the frame data. The corresponding position information on the magnetic disk and the operating state of the magnetic disk device are stored in a non-volatile storage device (flash memory or the like) according to a command from a host device connected to the outside of the magnetic disk device, and power is turned on. Sometimes, without waiting for the magnetic disk device to become ready, the The operating state of the positional information and the magnetic disk apparatus on the magnetic disk in which information of the content and the frame data corresponding to the frame data, characterized in that a means to keep reading the buffer memory.

According to a fifth aspect of the present invention, there is provided a data access method for a magnetic disk drive, wherein in a magnetic disk drive using a magnetic disk as a recording medium, when the magnetic disk is accessed to read and write various information data, Information (contents of recorded data, recording start and end of recording on the magnetic disk) of contents (large-capacity continuous data such as video data) recorded on the magnetic disk in accordance with an instruction from an externally connected host device. Position, recording date / time, and recording time), a plurality of frame data including the beginning of the content, position information on the magnetic disk corresponding to the frame data, and an operation state of the magnetic disk device. Memory, etc.), and when the power is turned on, the magnetic disk device enters a ready state. Without waiting, read out the information of the content, the frame data, the position information on the magnetic disk corresponding to the frame data, and the operation state of the magnetic disk device stored in the nonvolatile memory device to the buffer memory. It is characterized in that

A recording medium according to a sixth aspect of the present invention uses a magnetic disk as a recording medium and records a control program for a magnetic disk device that accesses the magnetic disk and reads and writes various information data. A medium, wherein a data access control program required to execute the data access method according to claim 5 is recorded.

According to this configuration and method, information (contents of large-capacity continuous data such as video data) recorded on the magnetic disk is recorded in the nonvolatile storage device in accordance with an instruction from a higher-level device. Data size, recording start and end positions on the magnetic disk, recording date and time, recording time), a plurality of frame data including the beginning of the content, position information on the magnetic disk corresponding to the frame data, and the magnetic disk By storing the operating state of the device in a non-volatile storage device (flash memory or the like), the user can access the magnetic disk when there is a request to search the contents of the content recorded on the magnetic disk device or to display a thumbnail. Time when the power is turned on, without waiting for the magnetic disk drive to become ready. Also without starting the magnetic disk, the data stored in the nonvolatile memory device by reading out buffer, can realize a magnetic disk device to improve the data transfer efficiency at low power consumption.

A magnetic disk drive according to a seventh aspect of the present invention is a magnetic disk drive for accessing a magnetic disk and reading and writing data of various types of information. At the time of recording on the disk device, information (position on the magnetic disk at the start of recording, recording date and time and recording time) of the content (large-capacity continuous data such as video data) recorded on the magnetic disk and the The head frame data, the position information on the magnetic disk corresponding to the frame data, and the operation state of the magnetic disk device are stored in a non-volatile storage device (such as a flash memory). The content stored from the non-volatile storage device without waiting for Information and the frame data and the position information on said magnetic disk corresponding to the frame data and the operating state of the magnetic disk device, characterized in that a means to keep reading the buffer memory.

According to a data access method of a magnetic disk drive of the present invention, in a magnetic disk drive using a magnetic disk as a recording medium, when accessing the magnetic disk to read and write various information data, At the time of recording from the higher-level device connected to the outside of the magnetic disk device to the magnetic disk device, information on the content (large-capacity continuous data such as video data) to be recorded on the magnetic disk (the magnetic disk at the start of recording) Position, recording date and time and recording time), the first frame data in the content, the position information on the magnetic disk corresponding to the frame data, and the operating state of the magnetic disk device. ), And when the power is turned on, the magnetic disk drive is ready to The information of the content stored from the nonvolatile storage device, the frame data, the position information on the magnetic disk corresponding to the frame data, and the operation state of the magnetic disk device are read out to a buffer memory. It is characterized by putting.

According to a ninth aspect of the present invention, there is provided a recording medium storing a control program for a magnetic disk drive for accessing a magnetic disk and reading and writing various information data. A data access control program required to execute the data access method is recorded.

According to this configuration and method, at the time of recording from the higher-level device to the non-volatile storage device, information of the content (large-capacity continuous data such as video data) to be recorded on the magnetic disk (magnetic recording at the start of recording). The position on the disk, the recording date and time, the recording time, the first frame data in the content, the position information on the magnetic disk corresponding to the frame data, and the operation state of the magnetic disk device are stored in a nonvolatile storage device (flash memory). ) To reduce the time required to access the magnetic disk when there is a request to search the contents of the content recorded on the magnetic disk device or to display a thumbnail. Without waiting for the disk to become ready and without activating the magnetic disk. The data stored in the storage device by reading out the buffer memory can be realized a magnetic disk apparatus for improving the data transfer efficiency at low power consumption.

According to the magnetic disk drive of the present invention, in a magnetic disk drive for accessing a magnetic disk and reading / writing data of various information, the magnetic disk drive is provided for a higher-level device connected outside the magnetic disk drive. At the time of reproduction from the magnetic disk device, information (position on the magnetic disk at the start of recording, recording date and time and recording time) of the content (large-capacity continuous data such as video data) reproduced from the magnetic disk, and , The position information on the magnetic disk corresponding to the frame data and the operating state of the magnetic disk device are stored in a non-volatile storage device (such as a flash memory). When the power is turned on, the magnetic disk device Without waiting for the ready state, the data stored in the nonvolatile storage Characterized in that a means to keep reading out the operating state of the positional information and the magnetic disk apparatus on the magnetic disk corresponding to the frame data and information and the frame data of the content in the buffer memory.

According to a data access method of a magnetic disk device according to the present invention, in a magnetic disk device using a magnetic disk as a recording medium, when accessing the magnetic disk and reading and writing data of various information, At the time of reproduction from the magnetic disk device to a higher-level device connected to the outside of the magnetic disk device, information on content (large-capacity continuous data such as video data) to be reproduced from the magnetic disk (the magnetic disk at the start of recording) Position, recording date and time and recording time), the first frame data in the content, the position information on the magnetic disk corresponding to the frame data, and the operating state of the magnetic disk device. ), And when the power is turned on, the magnetic disk device is ready. Without waiting for the contents to be stored in the non-volatile storage device, the frame data, the frame data, the position information on the magnetic disk corresponding to the frame data, and the operation state of the magnetic disk device in a buffer memory. Is read out.

According to a twelfth aspect of the present invention, there is provided a recording medium storing a control program for a magnetic disk device for accessing a magnetic disk to read and write various information data. A data access control program required to execute the data access method is recorded.

According to this configuration and method, at the time of reproduction from the magnetic disk device to the host device, information on the content (large-capacity continuous data such as video data) to be reproduced from the magnetic disk (the magnetic disk at the start of recording) Position, recording date / time, and recording time), the first frame data in the content, the position information on the magnetic disk corresponding to the frame data, and the operating state of the magnetic disk device. ) To reduce the time to access the magnetic disk when there is a request to search the contents of the content recorded on the magnetic disk device or to display a thumbnail. Without waiting for the ready state and without starting the magnetic disk, By reading the data stored in non-volatile storage in the buffer memory, it is possible to realize a magnetic disk device to improve the data transfer efficiency at low power consumption.

According to a thirteenth aspect of the present invention, there is provided a magnetic disk drive for accessing a magnetic disk and reading / writing data of various types of information, wherein the magnetic disk drive is connected to a higher-level device externally connected to the magnetic disk drive. At the time of reproduction from the disk device, when a reproduction stop command is received from the host device and reproduction of the content (large-capacity continuous data such as video data) of the magnetic disk device is stopped, reproduction time information (reproduction Date and time), frame data, position information on the magnetic disk corresponding to the frame data, and an operation state of the magnetic disk device are stored in a non-volatile storage device (flash memory or the like). Without waiting for the disk device to become ready, the data stored in the nonvolatile storage device Characterized in that said reproduction time information and the frame data and the position information on the magnetic disk corresponding to the frame data and the operating state of the magnetic disk device is provided with means to keep reading the buffer memory that.

According to a fourteenth aspect of the present invention, there is provided a data access method for a magnetic disk device in which a magnetic disk is used as a recording medium to read and write various information data by accessing the magnetic disk. At the time of reproduction from the magnetic disk device to a higher-level device connected to the outside of the magnetic disk device, a reproduction stop command is received from the higher-level device, and the content (large-capacity continuous data such as video data) of the magnetic disk device is received. When the reproduction is stopped, the non-volatile storage device stores reproduction time information (reproduction date and time and reproduction time) at the time of reproduction stop, frame data, position information on the magnetic disk corresponding to the frame data, and an operation state of the magnetic disk device. (Flash memory, etc.), and when the power is turned on, the magnetic disk drive Without waiting to become I state,
The reproduction time information, the frame data, the position information on the magnetic disk corresponding to the frame data, and the operation state of the magnetic disk device stored in the nonvolatile storage device are read out to a buffer memory. And

According to a fifteenth aspect of the present invention, there is provided a recording medium storing a control program for a magnetic disk device for accessing a magnetic disk and reading and writing various information data. A data access control program required to execute the data access method is recorded.

According to this configuration and method, the reproduction of the content (large-capacity continuous data such as video data) is temporarily stopped, the supply of power is stopped, and the power is turned on again. Large volume continuous data)
When the reproduction of the content is continued, when the reproduction of the content is stopped, reproduction time information (reproduction date and time and reproduction time) of the content (large-capacity continuous data such as video data) reproduced last from the magnetic disk is provided. The non-volatile storage device (flash memory or the like) stores the frame data at the time of reproduction stop in the content, the position information on the magnetic disk corresponding to the frame data at the time of reproduction stop, and the operation state (reproduction) of the magnetic disk device. By storing it,
Even if the supply of power is temporarily stopped and the power is turned on again, the data is stored from the nonvolatile storage device without waiting for the magnetic disk device to be in a ready state and without starting the magnetic disk. It is possible to execute the frame data when the reproduction is stopped, the position information on the magnetic disk corresponding to the frame data when the reproduction is stopped, and the operation state (reproduction) of the magnetic disk device.

A magnetic disk drive according to claim 16 of the present invention uses a magnetic disk as a recording medium and accesses the magnetic disk to read and write various information data. At the time of reproduction from the magnetic disk device to an externally connected host device, reproduction time information (reproduction date and time and reproduction time) of content (large-capacity continuous data such as video data) being reproduced from the magnetic disk device; Frame data, position information on the magnetic disk corresponding to the frame data, and an operation state of the magnetic disk device are stored at an interval in a non-volatile storage device (such as a flash memory). More than one set (the data corresponding to the current frame data being reproduced and Leave as previously stored data of the data) corresponding to the frame data stored in the,
When power is turned on, the reproduction time information, the frame data, and the position on the magnetic disk corresponding to the frame data stored in the nonvolatile storage device are not waited for the magnetic disk device to be in a ready state. A means for reading information and an operation state of the magnetic disk device into a buffer memory is provided.

According to a data access method of a magnetic disk drive according to the present invention, in a magnetic disk drive using a magnetic disk as a recording medium, when accessing the magnetic disk and reading / writing data of various information, At the time of reproduction from the magnetic disk device to a higher-level device connected to the outside of the magnetic disk device, reproduction time information (reproduction date and time) of content (large-capacity continuous data such as video data) reproduced from the magnetic disk device And reproduction time), frame data, position information on the magnetic disk corresponding to the frame data, and an operation state of the magnetic disk device are stored at an interval in a nonvolatile storage device (flash memory or the like). The device has at least two sets (the data corresponding to the current frame data being played and the previous one Data corresponding to the frame data stored in the non-volatile storage device) or more is stored in advance, and when the power is turned on, the non-volatile storage device does not wait for the magnetic disk device to be in a ready state. The reproduction time information, the frame data, the position information on the magnetic disk corresponding to the frame data, and the operation state of the magnetic disk device stored in a storage device are read out to a buffer memory.

A recording medium according to claim 18 of the present invention is a recording medium in which a control program for a magnetic disk device that accesses a magnetic disk and reads / writes data of various information is recorded. A data access control program required to execute the data access method is recorded.

According to this configuration and method, the power supply is suddenly stopped due to a power failure or the like during the reproduction of the content (large-capacity continuous data such as video data), the reproduction is interrupted, and the power is turned on again. When the reproduction of the content (large-capacity continuous data such as video data) is performed from the continuation, at the time of the reproduction of the content, the reproduction of the content (large-capacity continuous data such as video data) reproduced from the magnetic disk is performed. Time information (reproduction date and time and reproduction time), frame data in the content, position information on the magnetic disk corresponding to the frame data, and an operation state (reproduction) of the magnetic disk device are stored in a nonvolatile storage device (such as a flash memory). ) Is stored at an interval. At least two or more data to be stored and stored (for example, data corresponding to the current frame data being reproduced and data corresponding to the frame data stored immediately before)
It is. As a result, even if the data regarding the current frame data fails to be stored in the non-volatile storage device due to a sudden power failure or the like, the magnetic disk device reads the data regarding the immediately preceding frame data stored in the non-volatile storage device. Without waiting for the state, and without starting the magnetic disk, by reading to the buffer memory, it is possible to reduce the time to access the magnetic disk from the host device and search for the content to resume reproduction,
It is possible to realize a magnetic disk device that guarantees continuation of reproduction and that improves data transfer efficiency with low power consumption.

A magnetic disk drive according to a nineteenth aspect of the present invention uses a magnetic disk as a recording medium and accesses the magnetic disk to read and write various information data. Content (high-capacity continuous data such as video data) recorded on the magnetic disk device when recording from the externally connected host device to the magnetic disk device
Recording time information (recording date and time and recording time), frame data, position information on the magnetic disk corresponding to the frame data, and an operation state of the magnetic disk device at an interval in a nonvolatile storage device (flash memory or the like). At least two sets (the data corresponding to the current frame data being recorded and the data corresponding to the frame data stored immediately before in the nonvolatile storage device) are stored in the nonvolatile storage device. Data corresponding to data) is stored in advance, and when the power is turned on, the data stored in the nonvolatile storage device is not waited for the magnetic disk device to be in a ready state. The time information, the frame data, the position information on the magnetic disk corresponding to the frame data, and the operation of the magnetic disk device. State is characterized by providing a means to keep reading the buffer memory.

According to a twentieth aspect of the present invention, there is provided a data access method for a magnetic disk drive in which a magnetic disk is used as a recording medium to access the magnetic disk and read and write various information data. At the time of recording from the host device connected to the outside of the magnetic disk device to the magnetic disk device, recording time information (recording date and time) of the content (large-capacity continuous data such as video data) recorded on the magnetic disk device is recorded. And a recording time), frame data, position information on the magnetic disk corresponding to the frame data, and an operation state of the magnetic disk device are stored at an interval in a nonvolatile storage device (flash memory or the like). The device has at least two sets (the data corresponding to the current frame data being recorded and the Data corresponding to the frame data stored in the volatile storage device, one of which corresponds to the first frame data) or more, and when the power is turned on, wait for the magnetic disk device to become ready. Reading the recording time information, the frame data, the position information on the magnetic disk corresponding to the frame data, and the operating state of the magnetic disk device stored in the nonvolatile memory device into a buffer memory. It is characterized by.

A recording medium according to a twenty-first aspect of the present invention is a recording medium that records a control program for a magnetic disk device that accesses a magnetic disk and reads and writes various information data. A data access control program required to execute the data access method is recorded.

According to this configuration and method, at the time of recording from the higher-level device to the non-volatile storage device, the first frame of the content (large-capacity continuous data such as video data) recorded on the magnetic disk and the higher-order frame thereafter Content (large-capacity continuous data such as video data) recorded on the magnetic disk at a certain interval specified by the device
Recording time information (recording date and time and recording time), frame data in the content, position information on the magnetic disk corresponding to the frame data, and an operation state of the magnetic disk device in a nonvolatile storage device (flash memory or the like)
The time required to access the magnetic disk is reduced when there is a request for content search or preview of the content recorded on the magnetic disk device after that, and the magnetic disk device is ready when power is turned on. The data stored in the non-volatile storage device can be read out to the buffer memory and transferred to a higher-level device continuously without waiting for the data to be read out and without starting the magnetic disk. become,
A magnetic disk drive with low power consumption and improved data transfer efficiency can be realized.

A magnetic disk device according to a twenty-second aspect of the present invention includes a buffer memory capable of storing a plurality of frame data of content (large-capacity continuous data such as video data) reproduced or recorded on a magnetic disk. A read / write control unit that reproduces and records the content, a position information management unit that detects, generates, and stores position information indicating a physical position of the content on the magnetic disk; A frame data detecting means for detecting frame data of the content when reproducing the content or recording the content on the magnetic disk; and information on the content (recorded data size, recording start and end Position on the magnetic disk, recording date and time and recording time and playback date and time) A non-volatile storage device (such as a flash memory) for storing the obtained frame data, position information on the magnetic disk corresponding to the frame data, and an operation state of the magnetic disk device; A read command and a write command for data on the disk are given to the read / write control unit, the number of times of detection of the frame data and a time at the time of recording / reproduction are measured, and the nonvolatile storage device is controlled. And a control unit capable of controlling the whole.

According to this configuration, when reproducing the content on the magnetic disk or recording the content on the magnetic disk, the frame data of the content is detected and the physical data of the frame data on the magnetic disk is detected. Holds position information indicating a position, and information of the content corresponding to the frame data (recorded data size, recording start and end positions on the magnetic disk, recording date and time, recording time and reproducing date and time) The nonvolatile memory device according to the detected frame data, the position information on the magnetic disk corresponding to the frame data, and the operating state of the magnetic disk device, according to the number of times the frame data is detected and the recording / reproducing time. To be stored. Then, at the next power-on, the data stored in the non-volatile storage device is read out to the buffer memory, and without waiting for the magnetic disk device to become ready, and without starting the magnetic disk, By reading the data from the host device, it is possible to realize a magnetic disk drive that improves data transfer efficiency with low power consumption.

Hereinafter, a magnetic disk drive and an access method thereof according to an embodiment of the present invention will be specifically described with reference to the drawings. First, a magnetic disk drive according to an embodiment of the present invention will be described.

FIG. 1 shows a magnetic disk drive of the present embodiment. In FIG. 1, reference numeral 1 denotes an instruction (data access request) issued to the magnetic disk
0 is a higher-level device that performs data transfer. The magnetic disk device 10 controls the interface with the host device 1 and transmits a command from the host device 1 to the control unit 6, and the position information (physical cylinder number, head Number, sector number)
And a position information management unit 3 for detecting, generating, and storing data, and detecting frame data when reproducing content data on the magnetic disk 9 or recording content data on the magnetic disk 9, and Frame data detection unit 4 to be transmitted to control unit 6 that controls the entire operation
And content information (recorded data size,
(Recording start and end positions on the magnetic disk, recording date / time and recording time, and reproduction date / time and reproduction time), the frame data detected by the frame data detection unit 4, and the position information management unit 3 corresponding to the frame data. It comprises a flash memory 5 for storing the positional information on the magnetic disk 9 and the operating state of the magnetic disk device 10, a buffer memory 7, a read / write control unit 8, and a magnetic disk 9.

The control unit 6 performs seek control for the magnetic head, and issues a read command and a write command for content data on the magnetic disk 9 to the read / write control unit 8.
The access (write, read) to the flash memory 5 is controlled by the detection of the frame data from the frame data detection unit 4 to control the operation of the entire magnetic disk device 10.

The buffer memory 7 temporarily stores content data transferred between the host device 1 and the magnetic disk 9. The read / write control unit 8 includes a control unit 6
The read / write operation is performed on the magnetic disk 9 in accordance with the instruction from.

Hereinafter, a data access method in the magnetic disk drive of the embodiment of the present invention will be described. (Embodiment 1) A first embodiment of the present invention will be described with reference to FIG.

FIG. 2 is an explanatory diagram of a data access method of the magnetic disk device shown in FIG. 1. In this example, in the magnetic disk device 10 shown in FIG. Continuous data),
This shows the processing performed by the magnetic disk device 10 when the content A and the content B exist.

If there are a plurality of contents on the magnetic disk 9, the control section 6 controls the magnetic disk device 10 to control the magnetic disk 9 in step (S2-1).
Information on a plurality of contents (recorded data size, recording start and end positions on the magnetic disk, recording date and time, and recording time) is read from the upper system area and stored in the buffer memory 7.

Further, in step (S2-2), the control unit 6
Accesses and reads the head of one content (for example, content A) based on the read information, and stores the head frame in the buffer memory 7. At this time, in step (S2-3), the frame data detection unit 4 analyzes the data of the read content, and when the head of the frame data is detected, the position information management unit 3 and the control unit 6
Notify.

In step (S2-4), the position information management unit 3 stores the position information at the head of the frame data in response to the notification. In step (S2-5), the control unit 6 stores the arbitrary plurality of frame data in the content A in the buffer memory 7 in the same manner, and stores the plurality of pieces of position information corresponding thereto in the position information management unit 3. Store.

Next, in step (S2-6), the control unit 6
Information of the content A stored in the buffer memory 7 (recorded data size, recording start and end positions on the magnetic disk, recording date and time, recording time), a plurality of frame data, and stored in the position information management unit 3 Information of the content A and the magnetic disk device 10
Is stored in the flash memory 5 (reading from the magnetic disk 9, that is, reproduction).

Further, in step (S2-7), the control unit 6
Stores a plurality of frame data and a plurality of pieces of position information corresponding to the plurality of frame data for the content B in the same manner as in the case of the content A. Information of the content B stored in the buffer memory 7 (recorded data size,
The position on the magnetic disk at the start and end of recording, the recording date and time, and the recording time), a plurality of frame data, and the position information of the content B stored in the position information management unit 3 are stored in the flash memory 5. Then, in addition to the above, the operation state of the magnetic disk device 10 (reading from the magnetic disk 9,
That is, reproduction) is also stored in the flash memory 5.

In this manner, information on a plurality of contents existing on the magnetic disk 9 on the flash memory 5 (recorded data size, recording start and end positions on the magnetic disk, recording date and time, and recording time) And a plurality of pieces of frame data, a plurality of pieces of position information corresponding thereto, and an operation state of the magnetic disk device 10 can be stored.

As a result, if there is a request for a thumbnail display or a content search in step (S2-8), the time for accessing the magnetic disk 9 is reduced, and various data stored in the flash memory 5 are saved. The data can be read, and in step (S2-9), the data is stored in the flash memory 5 without waiting for the magnetic disk device 10 to become ready at the next power-on and without starting the magnetic disk 9. By reading out various data, the time for accessing the magnetic disk 9 can be reduced, and the power transfer efficiency can be improved with low power consumption.

As shown in FIG. 2, a control program for a magnetic disk device that accesses a magnetic disk to read and write various information data can be distributed as a recording medium. More specifically, the above-described control program for a magnetic disk device is a memory chip mounted on the control unit 6 or a floppy (registered trademark) in which a program is recorded so that the target control program for a magnetic disk device is written in the memory chip. ) It can be distributed on disks, CD-ROMs, etc.

(Embodiment 2) Claims 4 to 6 of the present invention
(Example 2) will be described with reference to FIG.

FIG. 3 is an explanatory diagram of the magnetic disk device shown in FIG. 1 and its data access method. In this case, in the magnetic disk device 10 shown in FIG. A process performed by the magnetic disk device 10 when a storage instruction of a plurality of frames including the first frame for A is issued to the magnetic disk device 10 and subsequently a similar storage instruction is issued for the content C. Is shown.

In step (S3-1), the host device 1
Is received by the host interface unit 2 of the magnetic disk device 10 in step (S3-2). Host interface unit 2
Informs the control unit 6 that the storage command from the host device 1 has been received. Accordingly, in step (S3-3), the control unit 6 analyzes the storage command received by the host interface unit 2 and recognizes that the storage command is a storage command for the content A existing on the magnetic disk 9. Then, in step (S3-4), the control unit 6 controls the magnetic disk device 10 to read information of the content A from the system area on the magnetic disk 9 (the size of the recorded data, the magnetic disk at the start and end of recording). Upper position, recording date and time)
Is read and stored in the buffer memory 7. Further, in step (S3-5), the control unit 6 accesses and reads the head of the content A based on the read information, and stores the frames in the buffer memory 7 sequentially from the head frame. At this time, in step (S3-6), the frame data detection unit 4 analyzes the data of the read content, and notifies the position information management unit 3 and the control unit 6 when detecting the head of each frame data. In step (S3-7),
Each time this notification is made, the position information management unit 3 stores the position information of the corresponding frame data. Next, in step (S3-8), when the storage of the plurality of frame data specified by the higher-level device 1 ends, the control unit 6 sets the content A stored in the buffer memory 7
(The recorded data size, the recording start and end positions on the magnetic disk, the recording date and time, and the recording time), the respective frame data, and the positional information of the respective frame data stored in the positional information management unit 3; In addition, the operation state of the magnetic disk device 10 (reading from the magnetic disk 9,
That is, reproduction) is stored in the flash memory 5. Subsequently, when a similar storage command for the content C is issued in step S3-9, the same processing as that for the content A is performed.

As described above, various data of contents requested by the host device 1 are stored in the flash memory 5 and
In step (S3-10), when there is a request for a thumbnail display or a content search of the content, the time for accessing the magnetic disk 9 is reduced, and various data stored in the flash memory 5 is read out to the buffer memory 7. Further, at step (S3-11), the next time the power is turned on, the data is stored in the flash memory 5 without waiting for the magnetic disk device 10 to be in the ready state and without starting the magnetic disk 9. Various data can be read in the buffer memory 7 in advance.

As a result, in step (S3-12), the host device 1 can read and process various data of the content stored in the buffer memory 7 through the host interface unit 2 of the magnetic disk device 10, Regarding thumbnail display of contents and content search processing, data transfer efficiency can be improved with low power consumption.

As shown in FIG. 3, a control program for a magnetic disk device that accesses a magnetic disk to read and write data of various information can be distributed as a recording medium. More specifically, the above-described control program for a magnetic disk device is a memory chip mounted on the control unit 6 or a floppy disk or a CD on which a program is recorded so as to write a target control program for a magnetic disk device on the memory chip. -Can be distributed in ROM or the like.

(Embodiment 3) Claims 7 to 9 of the present invention
(Example 3) will be described with reference to FIG.

FIG. 4 is an explanatory diagram of the magnetic disk device shown in FIG. 1 and its data access method. Here, in the magnetic disk device shown in FIG. 1, when a plurality of contents (large-capacity continuous data such as video), contents A and contents B are recorded from the host device 1 to the magnetic disk device 10, 2 shows processing performed by the magnetic disk device 10.

In step (S4-1), the host device 1
Is received by the host interface unit 2 of the magnetic disk device 10 in step (S4-2). Host interface unit 2
Informs the control unit 6 that the recording command from the host device 1 has been received. Accordingly, in step (S4-3), the control unit 6 analyzes the recording command received by the host interface unit 2, recognizes that the command is a recording command to the magnetic disk 9, and in step (S4-4), controls the control unit. 6 controls the magnetic disk device 10 to temporarily store the data of the content A sent from the host device 1 in the buffer memory 7, and then in step (S4-5), the control unit 6
1 calculates a physical position on the magnetic disk 9 where the content A requested is recorded, seeks the magnetic head to that position, and reads the magnetic disk 9 through the read / write control unit 8.
Write to At this time, in step (S4-6), the frame data detector 4 analyzes the data of the content A read from the buffer memory 7 and written to the magnetic disk 9, detects the head of the first frame data, and manages the position information. Notify the unit 3 and the control unit 6. Upon receiving this notification in step (S4-7), the position information management unit 3 stores the position information of the corresponding frame data. In step (S <b> 4-8), the control unit 6, based on the notification from the frame data detection unit 4, extracts the content temporarily stored in the buffer memory 7 corresponding to the position information stored in the position information management unit 3. A (recording date and time and recording time) and frame data are selected, and the flash memory 5
To store. At this time, the position information stored in the position information management unit 3 and the operation state (here, recording) of the magnetic disk device 10 are also stored in the flash memory 5. When the recording of the content A is completed and the recording command of the content B is issued from the higher-level device 1, in step (S4-9), the top frame is detected by the frame data detection unit 4 as in the case of the content A. Then, the position information is stored in the position information management unit 3, whereby the control unit 6 stores the information (the recording date and time or the recording time) of the content B temporarily stored in the buffer memory 7 and the first frame data. The position information stored in the position information management unit 3 and the operation state (recording in this case) of the magnetic disk device 10 are stored in the flash memory 5.

As described above, various data of contents recorded in the magnetic disk device 10 from the host device 1 are stored in the flash memory 5, and in step (S4-10), a request for a thumbnail display of contents or a request for contents search is made. In this case, without accessing the magnetic disk 9, the access time can be reduced, and the data of the content A and the content B stored in the flash memory 5 can be read out to the buffer memory 7, and further, the step (S4) When the power is turned on next time, the contents A and B stored in the flash memory 5 are stored in the flash memory 5 without waiting for the magnetic disk device 10 to be in the ready state and without starting the magnetic disk 9. Data can be read into the buffer memory 7 in advance.

As a result, in step (S 4-12), the host device 1 reads and processes each data of the content A and the content B stored in the buffer memory 7 through the host interface unit 2 of the magnetic disk device 10. This makes it possible to improve data transfer efficiency with low power consumption for thumbnail display of contents and content search processing.

As shown in FIG. 4, a control program for a magnetic disk device that accesses a magnetic disk to read and write various information data can be distributed as a recording medium. More specifically, the above-described control program for a magnetic disk device is a memory chip mounted on the control unit 6 or a floppy disk or a CD on which a program is recorded so as to write a target control program for a magnetic disk device on the memory chip. -Can be distributed in ROM or the like.

(Embodiment 4) A fourth embodiment of the present invention will be described with reference to FIG.

FIG. 5 is an explanatory diagram of the magnetic disk device shown in FIG. 1 and its data access method. Here, in the magnetic disk device shown in FIG. 1, the contents (large-capacity continuous data such as video), the contents A and the contents B are reproduced from the magnetic disk device 10 to the host device 1. 2 shows a process performed by the apparatus 10. The reproduction command of the content A issued from the host device 1 in step (S5-1) is received by the host interface unit 2 of the magnetic disk device 10 in step (S5-2). The host interface unit 2 notifies the control unit 6 that a reproduction command from the host device 1 has been received. Accordingly, in step (S5-3), the control unit 6 analyzes the reproduction command received by the host interface unit 2, recognizes that the command is a reproduction command from the magnetic disk 9, and in step (S5-4), controls the control unit. 6 controls the magnetic disk device 10 to calculate a physical position on the magnetic disk 9 where the content A requested by the host device 1 is reproduced, causes the magnetic head to seek to that position, And the data of the content A is temporarily stored in the buffer memory 7. At this time, in step (S5-5), the frame data detecting unit 4 analyzes the data of the content A read from the magnetic disk 9 and written into the buffer memory 7, detects the head of the first frame data, and manages the position information. Notify part 3. In step (S5-6), the position information management unit 3
Receives this notification, stores the position information of the corresponding frame data. Next, step (S5-7)
Then, the control unit reads the data of the content A temporarily stored from the buffer memory 7 and transfers the data to the host device 1 through the host interface unit 2. At this time, in step S5-8, the frame data detection unit analyzes the data of the content A read from the buffer memory 7 and transferred to the host device 1 through the host interface unit 2, and detects the head of the head frame data. The control unit 6 is notified. In step (S <b> 5-9), in response to the notification from the frame data detection unit 4, the control unit 6 determines from the position information stored in the position information management unit 3 the content temporarily stored in the corresponding buffer memory 7. A information (recording date and time and recording time) and frame data are selected and stored in the flash memory 5. At this time, the location information management unit 3
The position information and the operation state (here, reproduction) of the magnetic disk device 10 are also stored in the flash memory 5. When the reproduction of the content A ends, another content,
For example, when a reproduction command for the content B is issued from the higher-level device 1, in step (S5-10), the same processing as that for the content A is performed, and the content B temporarily stored in the buffer memory 7 is reproduced. Information (recording date and time and recording time), top frame data, and position information management unit 3
Then, the position information and the operation state (reproduction in this case) of the magnetic disk device 10 are stored in the flash memory 5.

As described above, various data of contents reproduced from the magnetic disk device 10 for the host device 1 are stored in the flash memory 5 and the step (S5-
In 11), when there is a request for a thumbnail display or a content search of the content, the access time is reduced without accessing the magnetic disk 9 and the flash memory 5 is accessed.
Can be read out to the buffer memory 7 in the contents A and B. In step (S5-12), the next time the power is turned on, the system waits for the magnetic disk device 10 to be in the ready state. Not
Also, the content A and the content B stored in the flash memory 5 are stored without starting the magnetic disk 9.
Can be read into the buffer memory 7 in advance. As a result, in step (S5-13), the host device 1 can read and process each data of the content A and the content B stored in the buffer memory 7 through the host interface unit 2 of the magnetic disk device 10. In addition, the data transfer efficiency can be improved with low power consumption for thumbnail display of contents and content search processing.

As shown in FIG. 5, a control program for a magnetic disk device for accessing a magnetic disk to read and write various information data can be distributed as a recording medium. More specifically, the above-described control program for a magnetic disk device is a memory chip mounted on the control unit 6 or a floppy disk or a CD on which a program is recorded so as to write a target control program for a magnetic disk device on the memory chip. -Can be distributed in ROM or the like.

(Embodiment 5) A fifth embodiment of the present invention will be described with reference to FIG.

FIG. 6 is an explanatory diagram of the magnetic disk device shown in FIG. 1 and its data access method. Here, in the magnetic disk device shown in FIG. 1, content A (large-capacity continuous data such as video) is reproduced from the magnetic disk device 10 to the host device 1, and the reproduction is stopped.
This shows the processing performed by the magnetic disk device 10 when other processing is performed and reproduction is performed from the continuation.

In step (S6-1), the host device 1
Is received by the host interface unit 2 of the magnetic disk device 10 in step (S6-2). Host interface unit 2
Notifies the control unit 6 that the reproduction command from the host device 1 has been received. Accordingly, in step (S6-3), the control unit 6 analyzes the reproduction command received by the host interface unit 2, recognizes that the command is a reproduction command from the magnetic disk 9, and in step (S6-4), executes the control unit. 6 calculates the physical position on the magnetic disk 9 for reproducing the content A requested by the host device 1 by controlling the magnetic disk device 10, causes the magnetic head to seek to that position, and controls the read / write control unit 8. And the data of the content A is temporarily stored in the buffer memory 7. At this time, in step (S6-5), the frame data detection unit 4 analyzes the data of the content A read from the magnetic disk 9 and written into the buffer memory 7, detects the head of the first frame data, and manages the position information. Notify part 3. In step (S6-6), the position information management unit 3
Receives this notification, stores the position information of the corresponding frame data. Next, step (S6-7)
Then, the control unit reads the data of the content A temporarily stored from the buffer memory 7 and transfers the data to the host device 1 through the host interface unit 2. At this time, in step (S6-8), the frame data detection unit analyzes the data of the content A read from the buffer memory 7 and transferred to the host device 1 through the host interface unit 2, and detects the head of the head frame data. Then, the control unit 6 is notified. In step S6-9, if there is no instruction to stop the reproduction of the content A from the higher-level device 1 based on the notification from the frame data detection unit 4, the control unit 6 proceeds to step S6.
Go to -4) to play the remaining content A. if,
If there is a reproduction stop command, step (S6-10)
In response to the notification from the frame data detecting unit 4, the control unit 6 extracts the frame data of the content A temporarily stored in the buffer memory 7 corresponding to the position information stored in the position information managing unit 3. And reproduction time information (reproduction date and time and reproduction time) at the time of reproduction stop are stored in the flash memory 5. At this time, the position information stored in the position information management unit 3 and the operation state (reproduction here) of the magnetic disk device 10 are also stored in the flash memory 5. Then, the reproduction of the content A ends.

As described above, various data of contents reproduced from the magnetic disk device 10 for the host device 1 are stored in the flash memory 5 when the reproduction is stopped, and after the host device 1 performs another process. If there is a request to continue the reproduction of the content A, in step (S6-11),
This access time can be reduced and the data of the content A stored in the flash memory 5 can be read out to the buffer memory 7 without accessing the magnetic disk 9. Is input in step (S6-12) without waiting for the magnetic disk device 10 to be in the ready state.
Each data of the content A stored in the flash memory 5 can be read into the buffer memory 7 in advance. As a result, in step (S6-13), the host device 1 can read and process each data of the content A stored from the buffer memory 7 through the host interface unit 2 of the magnetic disk device 10 and process the data. Without searching for the device 10, the content A can be reproduced continuously while waiting for the ready state of the magnetic disk device 10, and the data transfer efficiency can be improved with low power consumption.

As shown in FIG. 6, a control program for a magnetic disk device which accesses a magnetic disk to read and write various information data can be distributed as a recording medium. More specifically, the above-described control program for a magnetic disk device is a memory chip mounted on the control unit 6 or a floppy disk or a CD on which a program is recorded so as to write a target control program for a magnetic disk device on the memory chip. -Can be distributed in ROM or the like.

(Embodiment 6) A sixth embodiment of the present invention will be described with reference to FIGS. 7 and 8. FIG.

FIGS. 7 and 8 are explanatory views of the magnetic disk device shown in FIG. 1 and its data access method. Here, in the magnetic disk device shown in FIG.
When the content A (large-capacity continuous data such as video) is being reproduced from the magnetic disk device 10, the power supply is stopped due to a sudden power failure or the like, the reproduction is interrupted, and the power is turned on again. Then, the processing performed by the magnetic disk device 10 when the reproduction is performed from the continuation is shown.

In step (S7-1), the host device 1
Is received by the host interface unit 2 of the magnetic disk device 10 in step (S7-2). Host interface unit 2
Notifies the control unit 6 that the reproduction command from the host device 1 has been received. Accordingly, in step (S7-3), the control unit 6 analyzes the playback command received by the host interface unit 2, recognizes that the command is a playback command from the magnetic disk 9, and in step (S7-4), controls the control unit. 6 controls the magnetic disk device 10 to calculate a physical position on the magnetic disk 9 where the content A requested by the host device 1 is reproduced, causes the magnetic head to seek to that position, And the data of the content A is temporarily stored in the buffer memory 7. At this time, in step (S7-5), the frame data detection unit 4 analyzes the data of the content A read from the magnetic disk 9 and written to the buffer memory 7, detects the head of the first frame data, and manages the position information. Notify part 3. In step (S7-6), the position information management unit 3
Receives this notification, stores the position information of the corresponding frame data. Next, in step S7-7, the control unit reads the data of the content A temporarily stored from the buffer memory 7, and transfers the data to the host device 1 through the host interface unit 2. At this time, in step (S7-8), the frame data detection unit analyzes the data of the content A read from the buffer memory 7 and transferred to the host device 1 through the host interface unit 2, and detects the head of the head frame data. Then, the control unit 6 is notified. In step (S7-9), the control unit 6 receives the notification from the frame data detection unit 4 at a certain interval in which the number of times of detection of the frame data and the reproduction time are measured,
From the position information stored in the position information management unit 3, the frame data of the content A temporarily stored in the buffer memory 7 corresponding to the position information, the reproduction time information during reproduction (reproduction date and time and reproduction time), and the position information The position information and the operation state (here, reproduction) of the magnetic disk device 10 stored in the management unit 3 are stored in the flash memory 5. In step (S7-10), the control unit 6 stores at least two sets of data (data corresponding to the current frame data being reproduced and data corresponding to the frame data previously stored in the flash memory 5). Keep it. As described above, the steps (S7-4) to (S7-1)
0) is repeated, and the reproduction is performed. At this time, when the power supply is stopped due to a sudden power failure or the like, the power is turned on again, and the reproduction is restarted, the step (S7-1) in FIG.
In 1), the latest data of the content A stored in the flash memory 5 can be read out to the buffer memory 7, and even if the storage in the flash memory 5 fails due to a sudden power failure or the like. , Step (S
In step 7-12), the data corresponding to the immediately preceding frame data stored and held in the flash memory 5 can be read out to the buffer memory 7.

As a result, in step (S7-13), the upper level device 1 reads out each data of the content A stored from the buffer memory 7 through the host interface unit 2 of the magnetic disk device 10 and processes the data. The continuous reproduction of the content A is guaranteed without searching the magnetic disk drive 10,
After the ready state, the content A is continuously played back, and the data transfer efficiency can be improved with low power consumption.

As shown in FIGS. 7 and 8, a control program for a magnetic disk device that accesses a magnetic disk and reads / writes data of various types of information can be distributed as a recording medium. More specifically, the above-described control program for a magnetic disk device is a memory chip mounted on the control unit 6 or a floppy disk or a CD on which a program is recorded so as to write a target control program for a magnetic disk device on the memory chip. -Can be distributed in ROM or the like.

(Embodiment 7) Embodiment 7 of the present invention will be described with reference to FIG.

FIG. 9 is an explanatory diagram of the magnetic disk device shown in FIG. 1 and its data access method. Here, in the magnetic disk device shown in FIG. 1, when the content A (large-capacity continuous data such as video) is recorded from the host device 1 to the magnetic disk device 10, the recording is performed by the magnetic disk device 10. The processing is shown.

In step (S8-1), the host device 1
Is received by the host interface unit 2 of the magnetic disk device 10 in step (S8-2). Host interface unit 2
Informs the control unit 6 that the recording command from the host device 1 has been received. Accordingly, in step (S8-3), the control unit 6 analyzes the recording command received by the host interface unit 2, recognizes that the command is a recording command to the magnetic disk 9, and in step (S8-4), controls the control unit. 6 controls the magnetic disk device 10 to temporarily store the data of the content A sent from the host device 1 in the buffer memory 7, and then in step (S8-5), the control unit 6
1 calculates a physical position on the magnetic disk 9 where the content A requested is recorded, seeks the magnetic head to that position, and reads the magnetic disk 9 through the read / write control unit 8.
Write to At this time, in step (S8-6), the frame data detection unit 4 analyzes the data of the content A read from the buffer memory 7 and written to the magnetic disk 9, detects the head of the head frame data, and performs position information management. Notify the unit 3 and the control unit 6. In step (S8-7), upon receiving this notification, the position information management unit 3 stores the position information of the corresponding frame data. In step (S8-8), if there is a notification from the frame data detection unit 4 at a certain interval during which the number of times of detection of the frame data and the recording time are measured, the control unit 6
The frame information of the content A temporarily stored in the corresponding buffer memory 7 and the recording time information (recording date and time) at the time of recording, and the position information management unit 3 The position information and the operating state (recording here) of the magnetic disk device 10 are stored in the flash memory 5. And step (S8-
In step 9), the control unit 6 stores and holds at least two or more sets of data (data corresponding to the current frame data being reproduced and data corresponding to the frame data previously stored in the flash memory 5). Keep it.

As described above, various data of contents recorded in the magnetic disk device 10 from the host device 1 are stored in the flash memory 5 and the step (S8-10)
In the case where there is a request for a thumbnail display of content or a content search, the access time is reduced without accessing the magnetic disk 9 and each data of the content A stored in the flash memory 5 is transferred to the buffer memory 7.
At step (S8-11).
At the next power-on, each data of the content A stored in the flash memory 5 is stored in the buffer memory 7 without waiting for the magnetic disk device 10 to be in the ready state and without starting the magnetic disk 9. It can be read in advance.

As a result, in step (S 8-12), the host device 1 continuously reads and displays each data of the content A stored from the buffer memory 7 through the host interface unit 2 of the magnetic disk device 10. Thus, the content A can be previewed without accessing the magnetic disk 9, and the data transfer efficiency can be improved with low power consumption.

As shown in FIG. 9, a control program for a magnetic disk device that accesses a magnetic disk to read and write data of various information can be distributed as a recording medium. More specifically, the above-described control program for a magnetic disk device is a memory chip mounted on the control unit 6 or a floppy disk or a CD on which a program is recorded so as to write a target control program for a magnetic disk device on the memory chip. -Can be distributed in ROM or the like.

[0090]

As described above, according to the magnetic disk device and the data access method of the present invention, after the recording / reproduction of the magnetic disk device or when the power is turned on, the content search of the content recorded in the magnetic disk device and the thumbnail display are performed. Even if there is a request, without starting the magnetic disk,
The time required to access the magnetic disk can be reduced, the data transfer efficiency can be improved, and the processing of content search and thumbnail display can be executed with low power consumption. A nonvolatile storage for storing information of the content recorded on the magnetic disk, a plurality of frame data in the content, position information on the magnetic disk corresponding to the frame data, and an operation state of the magnetic disk device; Since the apparatus is provided, the above data access method can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration of a magnetic disk drive according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an operation when two contents exist on a magnetic disk in the magnetic disk device according to the first embodiment of the present invention;

FIG. 3 is an explanatory diagram of an operation when a storage instruction of a plurality of frames for a content on a magnetic disk is issued in the magnetic disk device according to the second embodiment of the present invention;

FIG. 4 is an explanatory diagram of an operation when recording content is performed in the magnetic disk device of the third embodiment of the present invention.

FIG. 5 is an operation explanatory diagram in the case where content is reproduced in the magnetic disk device of (Embodiment 4) of the present invention.

FIG. 6 is a diagram illustrating an example in which a content is reproduced in a magnetic disk device according to a fifth embodiment of the present invention.
Operation explanatory diagram when performing other processing and playing back from the continuation

FIG. 7 is an explanatory diagram of an operation in the case where content is reproduced in the magnetic disk device of (Embodiment 6) of the present invention.

FIG. 8 is a diagram illustrating a case in which the supply of power is stopped due to a sudden power failure or the like, the reproduction is interrupted, and the power is turned on again to reproduce the continuation of the content in the magnetic disk device according to the sixth embodiment of the present invention; Operation explanation diagram

FIG. 9 is an operation explanatory diagram in a case where content is recorded and at least two sets of data are stored in a flash memory in the magnetic disk device of (Embodiment 7) of the invention

FIG. 10 is a diagram illustrating an operation of a conventional magnetic disk device when a host device accesses the magnetic disk device after the power is turned on.

[Explanation of symbols]

Reference Signs List 1 host device 2 host interface unit 3 position information management unit (position information management unit) 4 frame data detection unit (frame data detection unit) 5 flash memory (non-volatile storage device) 6 control unit 7 buffer memory 8 read / write control unit 9 magnetic disk 10 magnetic disk device

Claims (22)

[Claims] 1. A magnetic disk device for accessing a magnetic disk to read and write data of various information, wherein information of a content recorded on the magnetic disk, a plurality of frame data in the content, and the frame data are stored. A magnetic disk device comprising means for storing corresponding position information on the magnetic disk and an operating state of the magnetic disk device in a nonvolatile storage device. 2. In a magnetic disk device using a magnetic disk as a recording medium, when reading and writing data of various information by accessing the magnetic disk, the information of the content recorded on the magnetic disk and the A plurality of frame data in content, position information on the magnetic disk corresponding to the frame data, and an operation state of the magnetic disk device are stored in a nonvolatile storage device, and the nonvolatile storage device is accessed without accessing the magnetic disk. A data access method for a magnetic disk device that reads data from the non-volatile storage device without waiting for completion of the initialization of the magnetic disk when data is read from the system or the system power supply is once turned off. 3. A recording medium storing a control program for a magnetic disk device for accessing a magnetic disk and reading / writing data of various information, the data being necessary to execute the data access method according to claim 2. A recording medium on which an access control program is recorded. 4. A magnetic disk device which accesses a magnetic disk and reads / writes data of various types of information, comprising: information of a content recorded on the magnetic disk; a plurality of frame data including a head in the content; The position information on the magnetic disk corresponding to the frame data and the operation state of the magnetic disk device are stored in a non-volatile storage device according to a command from a host device connected to the outside of the magnetic disk device. The information of the contents, the frame data, the position information on the magnetic disk corresponding to the frame data, and the operation state of the magnetic disk device from the nonvolatile storage device without waiting for the magnetic disk device to be ready. Disk drive provided with means for reading data into a buffer memory 5. In a magnetic disk drive using a magnetic disk as a recording medium, when accessing the magnetic disk and reading / writing data of various information, the magnetic disk is read by an instruction from an externally connected host device. The non-volatile storage device stores information of the content recorded in the storage device, a plurality of frame data including a head in the content, position information on the magnetic disk corresponding to the frame data, and an operation state of the magnetic disk device. When the power is turned on, without waiting for the magnetic disk device to be in a ready state, the information on the content stored from the nonvolatile storage device, the frame data, and the data on the magnetic disk corresponding to the frame data. The position information and the operating state of the magnetic disk device are read into a buffer memory. Data access method of a magnetic disk device to keep. 6. A recording medium on which a control program for a magnetic disk device for reading and writing data of various information by accessing a magnetic disk is recorded, which is necessary for executing the data access method according to claim 5. A recording medium on which a data access control program is recorded. 7. A magnetic disk device which accesses a magnetic disk and reads / writes data of various kinds of information. The information of the content recorded in the content, the top frame data in the content, the position information on the magnetic disk corresponding to the frame data, and the operating state of the magnetic disk device are stored in the nonvolatile storage device. Without waiting for the magnetic disk device to be in the ready state, the content information stored from the nonvolatile storage device, the frame data, and the position information on the magnetic disk corresponding to the frame data; A means is provided for reading the operating state of the magnetic disk drive to the buffer memory. A magnetic disk drive. 8. In a magnetic disk drive using a magnetic disk as a recording medium, when reading and writing data of various information by accessing the magnetic disk, a higher-level device connected to the outside of the magnetic disk device reads the magnetic data from the magnetic disk. At the time of recording on the disk device, the information of the content recorded on the magnetic disk, the first frame data in the content, the position information on the magnetic disk corresponding to the frame data, and the operation state of the magnetic disk device When the power is turned on, the content information, the frame data, and the frame data stored in the nonvolatile storage device are stored in the nonvolatile storage device without waiting for the magnetic disk device to be in a ready state. The corresponding position information on the magnetic disk and the magnetic disk device Data access method of a magnetic disk device to be read out work state to the buffer memory. 9. A recording medium storing a control program for a magnetic disk device for accessing a magnetic disk and reading and writing data of various information, the recording medium being necessary for executing the data access method according to claim 8. A recording medium on which a data access control program is recorded. 10. A magnetic disk device for accessing a magnetic disk to read and write data of various types of information, wherein when reproducing data from a magnetic disk device to a host device connected to the outside of the magnetic disk device, The information on the content to be reproduced from the content, the first frame data in the content, the position information on the magnetic disk corresponding to the frame data, and the operating state of the magnetic disk device are stored in the nonvolatile storage device. Without waiting for the magnetic disk device to be in a ready state, the content information stored from the nonvolatile storage device, the frame data, and the position information on the magnetic disk corresponding to the frame data; Read the operating state of the magnetic disk drive into the buffer memory A magnetic disk device provided with a means. 11. In a magnetic disk device using a magnetic disk as a recording medium, when reading and writing data of various information by accessing the magnetic disk, the magnetic disk device is connected to a higher-level device connected to the outside of the magnetic disk device. At the time of reproduction from the disk device, the information of the content reproduced from the magnetic disk, the first frame data in the content, the position information on the magnetic disk corresponding to the frame data, and the operation state of the magnetic disk device When the power is turned on, the content information, the frame data, and the frame data stored in the nonvolatile storage device are stored in the nonvolatile storage device without waiting for the magnetic disk device to be in a ready state. Corresponding position information on the magnetic disk and the magnetic disk Data access method of a magnetic disk device to be read the operating state of the click device to the buffer memory. 12. A recording medium on which a control program for a magnetic disk device for reading and writing data of various information by accessing a magnetic disk is recorded. A recording medium on which a data access control program is recorded. 13. A magnetic disk device which accesses a magnetic disk and reads / writes data of various kinds of information, wherein when reproducing from the magnetic disk device to a higher-level device connected to the outside of the magnetic disk device, reproduction from the higher-level device is performed. When a stop command is received and the reproduction of the content of the magnetic disk device is stopped, reproduction time information at the time of stopping reproduction, frame data, position information on the magnetic disk corresponding to the frame data, and operation of the magnetic disk device The state is stored in a nonvolatile storage device, and when power is turned on, the reproduction time information, the frame data, and the frame stored in the nonvolatile storage device are stored without waiting for the magnetic disk device to be in a ready state. Position information on the magnetic disk corresponding to the data and the operation of the magnetic disk device A magnetic disk device provided with a means for reading operation status into a buffer memory. 14. In a magnetic disk drive using a magnetic disk as a recording medium, when reading and writing data of various information by accessing the magnetic disk, the magnetic disk drive is connected to a higher-level device connected to the outside of the magnetic disk drive. When a reproduction stop command is received from a host device during reproduction from the disk device and reproduction of the content of the magnetic disk device is stopped, reproduction time information at the time of reproduction stop, frame data, and the magnetic disk corresponding to the frame data. The above position information and the operating state of the magnetic disk device are stored in a non-volatile storage device. When the power is turned on, the information is stored from the non-volatile storage device without waiting for the magnetic disk device to be in a ready state. The reproduction time information, the frame data, and the magnetic field corresponding to the frame data. A data access method for a magnetic disk device, in which position information on a disk and an operation state of the magnetic disk device are read into a buffer memory. 15. A recording medium storing a control program for a magnetic disk device for accessing a magnetic disk and reading and writing data of various information, the recording medium being necessary for executing the data access method according to claim 14. A recording medium on which a data access control program is recorded. 16. A magnetic disk device for accessing a magnetic disk to read and write various information data, wherein the magnetic disk device reproduces data from a higher-level device connected to the outside of the magnetic disk device from the magnetic disk device. The reproduction time information and the frame data of the content being reproduced from the magnetic disk device, and the position information on the magnetic disk corresponding to the frame data and the operation state of the magnetic disk device are stored at an interval in a nonvolatile storage device. At least two sets of data are stored in the storage device, and when the power is turned on, the data stored from the nonvolatile storage device is not waited for the magnetic disk device to be in a ready state. Playback time information, the frame data, and the data on the magnetic disk corresponding to the frame data. A magnetic disk drive provided with means for reading out position information and an operation state of the magnetic disk drive into a buffer memory. 17. In a magnetic disk drive using a magnetic disk as a recording medium, when reading and writing data of various information by accessing the magnetic disk, the magnetic disk drive is connected to a higher-level device connected to the outside of the magnetic disk drive. At the time of reproduction from the disk device, the reproduction time information of the content being reproduced from the magnetic disk device, the frame data, the position information on the magnetic disk corresponding to the frame data, and the operation state of the magnetic disk device are stored in a nonvolatile manner. At least two sets of data are stored in the non-volatile storage device at a certain interval, and at the time of turning on the power, without waiting for the magnetic disk device to become ready, The reproduction time information and the frame data stored from the nonvolatile storage device Data access method of a magnetic disk device position information on the magnetic disk corresponding to the serial frame data and the operating state of the magnetic disk device previously read in the buffer memory. 18. A recording medium on which a control program for a magnetic disk device for reading and writing data of various information by accessing a magnetic disk is recorded. A recording medium on which a data access control program is recorded. 19. A magnetic disk drive for accessing a magnetic disk to read and write data of various types of information, wherein when recording data from an upper device connected to the outside of the magnetic disk device to the magnetic disk device, the magnetic disk device The recording time information and the frame data of the content recorded to the magnetic disk and the position information on the magnetic disk corresponding to the frame data and the operation state of the magnetic disk device are stored at an interval in a nonvolatile storage device. At least two sets of data are stored in the storage device, and when the power is turned on, the data stored from the nonvolatile storage device is not waited for the magnetic disk device to be in a ready state. Recording time information, the frame data, and position information on the magnetic disk corresponding to the frame data And a means for reading the operating state of the magnetic disk device into a buffer memory. 20. In a magnetic disk drive using a magnetic disk as a recording medium, when accessing the magnetic disk and reading / writing data of various types of information, a host device connected to the outside of the magnetic disk device reads the magnetic information. At the time of recording on the disk device, the recording time information and the frame data of the content recorded on the magnetic disk device, the position information on the magnetic disk corresponding to the frame data, and the operation state of the magnetic disk device are stored in a nonvolatile manner. At least two sets of data are stored in the non-volatile storage device at a certain interval, and when the power is turned on, the data is transferred from the non-volatile storage device without waiting for the magnetic disk device to become ready. The stored recording time information, the frame data, and the frame data corresponding to the Data access method of a magnetic disk device the operating state of the position information on the magnetic disk a magnetic disk device previously read in the buffer memory. 21. A recording medium for recording a control program for a magnetic disk device for accessing a magnetic disk and reading / writing data of various information, the recording medium being necessary for executing the data access method according to claim 20. A recording medium on which a data access control program is recorded. 22. A buffer memory (7) capable of storing a plurality of frame data of contents reproduced or recorded on a magnetic disk, a read / write control unit (8) for reproducing and recording the contents. A position information management means (3) for detecting, generating and storing position information indicating a physical position of the content on the magnetic disk; reproducing the content on the magnetic disk or recording the content on the magnetic disk; A frame data detecting means (4) for detecting frame data of the content at the time of the operation; information of the content, the detected frame data, position information on the magnetic disk corresponding to the frame data, and the magnetic disk; A non-volatile storage device (5) for storing an operation state of the device; A control for performing a seek control, giving a read command and a write command for data on a magnetic disk to the read / write control unit, and measuring the number of times of detection of the frame data and a time at the time of recording / reproducing to control the nonvolatile storage device. A magnetic disk drive comprising a unit (6).