JPH08195031A - Hard disk device - Google Patents

Abstract

PURPOSE: To record/reproduce sequential data such as moving picture data and audio data without providing a buffer on the outside. CONSTITUTION: This device is separately provided with an interface 3 dedicated to data for inputting/outputting the recorded/reproduced data, and an interface 4 for inputting/outputting a command or an address other than the data. Therefore, reproducing is executed simultaneously with recording without providing the buffer on the outside when a moving picture video or sound information is recorded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hard disk device which is particularly suitable for reading / writing sequential data such as moving image data and audio data.

[0002]

2. Description of the Related Art A hard disk device is a storage device which can store a large amount of data and can transfer the data at high speed. A moving image recording / reproducing system using such a hard disk device has been proposed.

In a conventional hard disk device, an IDE system or a SCSI system is used as an interface. In these interfaces, data is read / written after a command or address is specified. For this reason, when the conventional hard disk device is used in a moving picture recording / reproducing system, a buffer for temporarily storing the recording / reproducing data is required.

That is, FIG. 6 shows the configuration of a conventional hard disk device. This hard disk device includes a drive block 201 and a servo block 202.
It has a cache memory 206 and a hard disk controller 208.

The drive block 201 comprises a magnetic disk 210, a magnetic head 211 for writing / reading data to / from the magnetic disk 210, and a modulator / demodulator 212 for modulating / demodulating data.

The servo block 202 comprises a spindle motor 222 for rotating the magnetic head, a voice coil motor 221 for moving the magnetic head, and a servo circuit 220 for controlling the spindle motor 222 and the voice coil motor 221.

The cache memory 206 is used to temporarily save input / output data. The hard disk controller 208 controls the internal mode in accordance with the command of the host CPU, and the cache memory 2
06 control and error correction processing for input / output data.

In this hard disk device, as the input / output interface 203, for example, an IDE type interface is used. Data input / output and command / address input / output are performed between the host CPU (not shown) and the interface 203.

In the IDE interface 203, the host CPU accesses the register address assigned on the interface. The registers include a command register, an address register, a data register and the like. The host CPU first writes a command such as WRITE or READ in the command register. Then, the write or read destination address is written in the address register. Then, the data register transmits / receives data.

The hard disk controller 208 controls the mode inside the hard disk according to the sent command. The modes include a write mode and a read mode.

In the write mode, when the hard disk controller 208 receives a WRIT command, it outputs servo information to the servo block 202 based on the address sent next. The sub block 202 seeks the magnetic head 211 to a predetermined position on the magnetic disk 210 based on this servo information. The hard disk controller 208 also adds an error correction code to the data output by the host CPU and outputs the data to the drive block 201. In the modulator / demodulator 212 of the drive block 201, 1-7 RLL (Run Length L
(Imitated) modulation is performed, and the modulated data is recorded on the magnetic disk 210 through the magnetic head 211. This operation is repeated for each sector.

In the read mode, when the hard disk controller 208 receives a READ command, it gives servo information to the servo block 202 based on the address sent next. The servo block 202 seeks the magnetic head 211 to a predetermined position on the magnetic disk 210 based on this servo information. From the magnetic disk 210 of the drive block 201 to the magnetic head 2
The signal reproduced through 11 is 1-
7RLL demodulation is performed and hard disk controller 2
It is output to 08. Hard disk controller 208
Then, error correction processing is performed and the data is output to the host CPU. This operation is repeated for each sector.

The hard disk controller 208 arbitrates the timing between the interface 203 and the drive block 201 in both the write mode and the read mode so as to arbitrate the cache memory 70.
It has a function to save data to. In particular, when the data is available, the data is output from the cache memory 206 to the interface 203 without being reproduced from the magnetic disk 210.

FIG. 7 shows an example of a moving picture recording / reproducing system using such a conventional hard disk. In FIG. 7, the host CPU 110 manages the entire operation. A tuner 101 is provided here as a source of a signal to be recorded.

At the time of recording, the output of the tuner 101 is A
It is digitized by the / D converter 102 and sent to the encoder 103. The encoder 103 reduces the amount of information in order to record the digitized moving image data on the disc. As the encoder 103, one that thins out data to reduce the amount of information, JPEG
It is possible to use the one that compresses and encodes data by MPEG or MPEG. The data to be recorded is temporarily stored in the FIFO 104. The output of the FIFO 104 is supplied to the hard disk device 109 and recorded. The hard disk 109 is, for example, an IDE type interface.

At the time of reproduction, the output of the hard disk 109 is supplied to the FIFO 105. The output of the FIFO 105 is supplied to the decoder 106. The decoder 106
The processing opposite to the encoder 103 is performed to decode the reproduction data. The output of the decoder 106 is D /
The signal is supplied to the A converter 107, converted into an analog signal, and supplied to the television receiver 108.

As described above, the conventional hard disk device 109 sends commands and addresses before sending data when recording / reproducing data. Therefore, data cannot be input / output while sending a command or address. On the other hand, moving image data and audio data are sequential data and are continuously transferred. Therefore, in the past, FI for buffering moving image data or video to be recorded or played back has been used.
FO memories 104 and 105 are required.

Since the cache memory control is controlled on the premise of random access, whether the hard disk controller reads from the cache memory,
There is time to determine whether to reproduce from a magnetic disk, and there is waste in recording and reproducing continuous data such as moving image data and audio data.

Furthermore, in the conventional hard disk device 109, since it is necessary to match the timing of data on the interface, the waiting time such as the seek time of the hard disk cannot be defined on the interface. Therefore, there is a problem that the buffer cannot be optimized.

Therefore, an object of the present invention is to provide a hard disk device capable of recording / reproducing sequential data such as moving image data and audio data without having an external buffer.

Another object of the present invention is to provide a hard disk device capable of optimizing the capacity of the buffer memory and performing control such that reproduction is performed while recording.

[0022]

According to the present invention, a magnetic disk for recording / reproducing data, a magnetic head for moving on the magnetic disk to record / reproduce data on / from the magnetic disk, and rotation of the magnetic disk are controlled. In addition, in a hard disk device consisting of a control means for controlling to read / write data at a predetermined address of a magnetic disk, a data interface for inputting / outputting data to be recorded / reproduced, a command and an address, etc. The hard disk device is characterized in that an input / output command / address interface is provided separately.

According to the present invention, a magnetic disk for recording / reproducing data, a magnetic head for moving on the magnetic disk to record / reproduce data on / from the magnetic disk, control of rotation of the magnetic disk, and In a hard disk device comprising a control means for controlling reading / writing of data at a predetermined address, an input data interface for inputting recording data, an output data interface for outputting reproduction data,
A hard disk device characterized in that a command / address interface for inputting / outputting a command, an address, etc. is separately provided.

[0024]

A data dedicated interface 3 for inputting / outputting data to be recorded / reproduced and an interface 4 for inputting / outputting commands and addresses other than data are provided. For this reason, when recording moving image and audio information, it is possible to reproduce at the same time as recording, without having an external buffer.

Further, a data-dedicated interface 53A for inputting recording / reproducing data and a data-dedicated interface 53B for outputting recording / reproducing data.
And an interface 54 for inputting / outputting commands and addresses other than data. By optimizing the capacity of the FIFOs 56A and 56B provided for the interfaces 53A and 53B,
It is possible to perform control such as playing back while recording.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention. In FIG. 1, 1 is a drive block and 2 is a servo block.

The drive block 1 is a magnetic disk 10
And a magnetic head 11 for recording / reproducing data on / from the magnetic disk 10 and a modulator / demodulator 12 for modulating / demodulating the recording / reproducing data.

The servo block 2 includes a spindle motor 22 for rotating the magnetic disk 10, a voice coil motor 21 for moving the magnetic head 11, and a servo circuit 20 for controlling the spindle motor 22 and the voice coil motor 21. Become.

The bird disk device to which the present invention is applied is provided with an interface 3 and an interface 4. The interface 3 is a data-only interface, and is connected to the input terminal of the FIFO 6 through the switch 31. The output terminal of the FIFO 6 is connected to the hard disk controller 8 through the switch 32.

The interface 4 is an interface other than data (mainly for commands and addresses) and is connected to the hard disk controller 8. Host CP
The U defines a register address and writes a command and an address to the interface 4.

The hard disk controller 8 controls the mode inside the hard disk according to the command.
The hard disk controller 8 has a function 35 for controlling the FIFO 6 and a servo block 2 for the magnetic disk 1.
It has a function 36 for generating consecutive addresses so that 0 consecutive sectors can be traced.

In write mode, interface 4
When the hard disk controller 8 receives a WRITE command input from, the servo information is given to the servo block 2 based on the address sent next. The servo block 2 seeks the magnetic head 11 to a predetermined position on the magnetic disk 10 based on this servo information. Further, the hard disk controller 8 connects the switches 31 and 32 to the terminals 31A and 32A, respectively,
An error correction code is added to the data output from the FIFO 6 and the data is output to the drive block 1. The modulator / demodulator 12 of the drive block 1 modulates this data and records it on the magnetic disk 10 through the magnetic head 11.

The hard disk controller 8 is a FIF
Successive addresses are generated so that the data output from O6 is recorded on successive sectors of the magnetic disk 10.
Servo information is sent to the servo block 2 so as to seek this continuous address. Therefore, the host C
The PU does not need to send a command or address for each sector.

In read mode, interface 4
When the hard disk controller 8 receives the READ command input from, the servo information is given to the servo block 2 so as to seek the address sent next. Based on this servo information, the servo block 2 sets the magnetic head 11 at a predetermined position on the magnetic disk 10.
Seek. The signal reproduced from the magnetic disk 10 in the drive block 1 through the magnetic head 11 is
The modulator / demodulator 12 demodulates and outputs to the hard disk controller 8. The hard disk controller 8 performs error correction processing, connects the switches 31 and 32 to the terminals 31B and 32B, and outputs data to the FIFO 6. The hard disk controller 8 generates consecutive addresses so as to reproduce on consecutive sectors of the magnetic disk 10. Then, the servo information is sent to the servo block 2. Therefore, the host CPU
Need not send a command or address for each sector (or for each cluster).

Further, the hard disk controller 8 is
It has a function of detecting the pattern of the input data and controlling the writing of the FIFO 6. For example, when recording one frame of data for each cluster of a predetermined number of sectors of the magnetic disk, the hard disk controller 8
Detects the header at the beginning of one frame of input data, and resets the FIFO 6 when the header is detected. As a result, the FIFO 6 is filled with data from the beginning of one frame, and one frame is recorded in one cluster. By accessing each cluster, smooth special playback is possible.

FIG. 2 shows another embodiment of the present invention. In FIG. 2, the drive block 51 and the servo block 52 are the same as the drive block 1 and the servo block 2 in the above-described first embodiment.

In this embodiment, the interface 53A
And 53B and an interface 54 are provided.

The interface 53A is an interface dedicated to input data and is connected to the input terminal of the FIFO 56A. The output terminal of the FIFO 56A is connected to the hard disk controller 58.

The interface 53B is an interface dedicated to output data, and is connected to the output terminal of the FIFO 56B. The input terminal of the FIFO 56B is connected to the hard disk controller 58.

The interface 54 is an interface other than data (mainly for commands and addresses),
It is connected to the hard disk controller 58. The host CPU defines a register address and writes a command and an address to the interface 54.
The hard disk controller 58 controls the mode inside the hard disk according to the command. The hard disk controller 58 also has a function 85 for controlling the FIFOs 56A and 56B and a continuous address generating function 86.

In the write mode, the interface 5
When the hard disk controller 58 receives the WRITE command input from the No. 4, the servo information is given to the servo block 52 based on the address sent next. The servo block 52, based on this servo information,
The magnetic head 6 is placed at a predetermined position on the magnetic disk 60.
Seek 1 In addition, the hard disk controller 58
Adds an error correction code to the data output from the input data FIFO 56A and outputs the data to the drive block 51. The modulator / demodulator 12 of the drive block 51 modulates this data and records it on the magnetic disk 60 through the magnetic head 61.

In read mode, interface 5
When the hard disk controller 58 receives the READ command inputted from the No. 4, the servo information is given to the servo block 52 based on the address sent next. The servo block 52 seeks the magnetic head 61 to a predetermined position on the magnetic disk 60 based on this servo information. The signal reproduced from the magnetic disk 60 of the drive block 51 through the magnetic head 61 is demodulated by the modulator / demodulator 62, and the hard disk controller 58
Is output to The hard disk controller 58 performs error correction processing and outputs the data to the output data FIFO 56B.

In this embodiment, an interface 53A for recorded data and an interface 5 for reproduced data are used.
3B and an interface 54 for commands and addresses other than data are separately provided. Then, for the interfaces 53A and 53B, the FIFO5
6A and 56B are provided. Therefore, it is possible to reproduce the previous data while performing continuous recording. That is, as shown in FIG. 3, for example, while recording to the position A1 at the current time,
It is possible to reproduce the position A2 0 minutes before. The positions A1 and A2 can be set freely. The capability of such recording and reproduction will be described with reference to FIG.

In FIG. 4, m is the data transfer rate for the magnetic disk 60, w is the sum of seek time and rotation waiting time, v is the transfer rate of data to be recorded or reproduced, and s is the capacity of the FIFOs 56A and 56B. Is represented.

FIG. 4A shows the time for writing all the input data to the FIFO 6, and this time is s / v.
Becomes FIG. 4B shows the operating time of the drive block. The time to read the data from the FIFO 56A and write it all to the disk is s / m, the time to move from the write position to the read position on the disk is w, and similarly the data read from the disk is FIFO.
The time for writing all data to 56B is s / m, and the time for moving from the read position on the disc to the next write position is w. FIG. 4C shows the time for reading and outputting the data of the FIFO 56B, and this time is also s / v. As shown in the figure, the drive block 52 has a time (s / v) for writing data to the FIFO 56A or reading data from the FIFO 56B7.
When it is equal to the operating time (s / m + w + s / m + w), it is possible to make the moving image information and the audio information appear to be simultaneously recorded and reproduced.

That is, when the capacity of the FIFOs 56A and 56B is calculated from the relational expression of s / v = s / m + w + s / m + w, it becomes s = 2 · m · w · v / (m−2v).

That is, a hard disk capable of simultaneous recording and reproduction can be realized by having FIFOs 56A and 56B satisfying the relationship of s ≧ 2 · m · w · v / (m-2v) for input data and output data respectively. .

[0048]

According to the present invention, the data dedicated interface 3 for inputting / outputting the data to be recorded / reproduced and the interface 4 for inputting / outputting the commands and addresses other than the data are provided. For this reason, when recording moving image and audio information, it is possible to reproduce at the same time as recording, without having an external buffer. Also,
In addition to the host CPU not directly involved in data transfer,
Since it is not necessary to access each sector during normal recording / playback, the load on the host CPU is reduced. In addition, smooth retrieval and special reproduction are realized by recording a delimiter such as a frame unit of image information for each cluster.

Further, according to the present invention, the data-only interface 53A for inputting the data to be recorded / reproduced.
And an interface 53B dedicated to data for outputting data to be recorded / reproduced, and an interface 54 for inputting / outputting commands and addresses other than data. Then, by optimizing the capacities of the FIFOs 56A and 56B provided for the interfaces 53A and 53B, it is possible to perform control such that recording and reproduction are performed at the same time.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a hard disk device to which the present invention is applied.

FIG. 2 is a block diagram showing another embodiment of a hard disk device to which the present invention is applied.

FIG. 3 is a schematic diagram used for explaining another embodiment of the hard disk device to which the present invention is applied.

FIG. 4 is a schematic diagram used for explaining another embodiment of the hard disk device to which the present invention is applied.

FIG. 5 is a block diagram of an operation recording / reproducing system using a hard disk device to which the present invention is applied.

FIG. 6 is a block diagram showing an example of a conventional hard disk device.

FIG. 7 is a block diagram of an operation recording / reproducing system using a conventional hard disk device.

[Explanation of symbols]

 1 Drive Block 2 Servo Block 3 Data Dedicated Interface 4 Non-Data Interface 6 FIFO 51 Drive Block 52 Servo Block 53A Input Data Interface 53B Output Data Interface 54 Non-Data Interface 56A, 56B FIFO

Claims (7)

[Claims] 1. A magnetic disk for recording / reproducing data, a magnetic head for moving on the magnetic disk to record / reproduce data on / from the magnetic disk, and a magnetic head for controlling rotation of the magnetic disk, In a hard disk device comprising a control means for controlling reading / writing of data to a predetermined address of a disk, a data interface for inputting / outputting data to be recorded / reproduced and input / output of commands, addresses, etc. A hard disk device characterized in that a command / address interface is provided separately. 2. A FIF for the data interface
The hard disk device according to claim 1, further comprising an O memory connected thereto. 3. The hard disk drive according to claim 1, wherein the control means traces the magnetic head at successive addresses on the magnetic disk to perform writing and reading. 4. The control means detects a header of data and, when the header is detected, stores the data from the head of a FIFO memory connected to the interface for the data. 1-3
The hard disk device described. 5. A magnetic disk for recording / reproducing data, a magnetic head for moving on the magnetic disk to record / reproduce data on / from the magnetic disk, and controlling the rotation of the magnetic disk while controlling the magnetic field. In a hard disk device comprising a control unit for controlling reading / writing of data at a predetermined address of a disk, an input data interface for inputting recording data, an output data interface for outputting reproduction data, a command and Command to input / output address /
A hard disk drive characterized in that an address interface is provided separately. 6. The hard disk drive according to claim 5, wherein a FIFO memory is connected to each of the input data interface and the output data interface. 7. The capacity s of the FIFO memory is s ≧ 2, where m is a data transfer rate, w is a sum of seek time and rotation waiting time, and v is a transfer rate of data to be recorded or reproduced. 7. The hard disk device according to claim 5, wherein the relationship of m.w.v / (m-2v) is satisfied.