KR100546377B1 - Method for improving data transmission speed in data storage system and disc drive using the same - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data storage device and a control method thereof, and more particularly, to a data transmission speed improving method and a disk drive using the same in a data storage system for processing data using regularity of commands transmitted from a host device.

In a method of improving a data transmission speed in a data storage system according to a first embodiment of the present invention, the method of controlling a data storage system includes the steps of: (a) analyzing regularity of a command received from a host device; Analyzing the predicted command to be received next, if the regularity of the command received from the host device is determined as a result of step (a), and (c) executing a preparatory mode for executing the predicted command. It is characterized by including.

Description

Method for improving data transmission speed in data storage system and disc drive using the same}

1 is a plan view of a configuration of a disk drive to which the present invention is applied.

2 is an electrical circuit diagram of a disk drive to which a data transmission speed improving method according to the present invention is applied.

3 is a flowchart illustrating a data transmission speed improving method in a data storage system according to a first embodiment of the present invention.

4 is a flowchart illustrating a data transmission speed improving method in a data storage system according to a second embodiment of the present invention.

5 is a diagram illustrating a process operation procedure for explaining an example of executing a regular mode in the host device.

FIG. 6 is a diagram illustrating an operation sequence of a disk drive for executing the process of FIG. 5.

7 is a diagram illustrating a stream order that is regularly processed in the disk drive.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data storage device and a control method thereof, and more particularly, to a data transmission speed improving method and a disk drive using the same in a data storage system for processing data using regularity of commands transmitted from a host device.

In general, a multimedia system includes an A / V device that processes an audio / video signal and storage means for storing data processed by the A / V device. As an example of the storage means, a hard disk drive is used. The disk drive executes a write or read mode of data in accordance with a command transmitted from the connected host device, that is, the controller of the A / V device.

In addition, when a hard disk drive is used as a data storage means of a personal video recorder (PVR) device, there are many cases in which a read or write mode is repeatedly executed.

According to the related art, when the hard disk drive regularly executes a read or write mode repeatedly, the hard disk drive receives a read or write command from a host device, decrypts it, and executes the decrypted command. There was a problem with that.

SUMMARY OF THE INVENTION In order to solve the above problems, a technical object of the present invention is to improve a data transmission speed in a data storage system for improving data processing speed by using a regularity of a command received from a host device, and a disk drive using the same. To provide.

In order to achieve the above technical problem, a method of improving data transmission speed in a data storage system according to a first embodiment of the present invention is a control method of a data storage system, the method comprising: (a) analyzing regularity of a command received from a host device; (B) analyzing the prediction command to be received next if there is regularity of the command received from the host device as a result of the determination of step (a); and (c) prior to executing the prediction command. And executing the ready mode.

In order to achieve the above technical problem, the data transmission speed improving method of the data storage system according to the second embodiment of the present invention is a control method of the data storage system, which means that (a) a regular command is transmitted from a host device. Determining whether a specific command to be informed is received, (b) when the specific command is received, transitioning to a predictive mode to analyze a predicted command to be received next, and (c) preparatory preparation for executing the predicted command. And executing the mode.

Disc drive according to the first embodiment of the present invention in order to achieve the above another technical problem, in the data storage device, a host interface for performing data transmission / reception process with the host device, firmware and control information for controlling the disk drive A memory having a built-in memory, a buffer for storing data received from the host device through the host interface in a write mode, a buffer for storing data reproduced from a disk in a read mode, and a command received from the host device through the host interface. A regularity of the controller to analyze a prediction command to be received next if there is regularity and to execute a preliminary preparation mode for executing the analyzed prediction command and received through the host interface. The data stored in the buffer And a write / read circuit for performing data processing for writing to a disc or reading data from the disc and storing the data in the buffer.

In accordance with another aspect of the present invention, a disk drive includes a host interface that executes data transmission / reception processing with a host device, firmware for controlling the disk drive, and control information in a data storage device. A memory having a built-in memory, a buffer for storing data received from the host device through the host interface in a write mode, a buffer for storing data played back from the disk in a read mode, and notifying that a regular command is being transmitted from the host device. A controller for judging whether a specific command is received and, when the specific command is received, transitioning to a prediction mode to analyze a prediction command to be received next, and executing a preliminary preparation mode for executing the prediction command; Number through host interface And a write / read circuit for writing data stored in the buffer to a disc or performing data processing for reading data from the disc and storing the data in the buffer.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a configuration of a disk drive 10 to which the present invention is applied. The drive 10 includes at least one magnetic disk 12 that is rotated by a spindle motor 14. The disk drive 10 also includes a transducer 16 located adjacent to the disk surface 18.

The transducer 16 can read or write information on the rotating disk 12 by sensing and magnetizing the magnetic field of each disk 12. Typically transducer 16 is coupled to each disk surface 18. Although illustrated and described as a single transducer 16, it should be understood that this consists of a write transducer for magnetizing the disc 12 and a separate read transducer for sensing the magnetic field of the disc 12. Read transducers are constructed from Magneto-Resistive (MR) devices. The transducer 16 is also commonly referred to as a head.

The transducer 16 can be integrated into the slider 20. The slider 20 is structured to create an air bearing between the transducer 16 and the disk surface 18. The slider 20 is coupled to the head gimbal assembly 22. The head gimbal assembly 22 is attached to an actuator arm 24 having a voice coil 26. The voice coil 26 is located adjacent to the magnetic assembly 28 that specifies the voice coil motor 30 (VCM). The current supplied to the voice coil 26 generates a torque to rotate the actuator arm 24 relative to the bearing assembly 32. Rotation of the actuator arm 24 will move the transducer 16 across the disk surface 18.

The information is typically stored in an annular track of the disc 12. Each track 34 generally includes a plurality of sectors. Each sector includes a data field and an identification field. The identification field is composed of a gray code identifying a sector and a track (cylinder). The transducer 16 is moved across the disk surface 18 to read or write information on other tracks.

2 shows an electrical circuit of a disk drive to which the present invention is applied.

As shown in FIG. 2, the disk drive according to the present invention includes a disk 12, a converter 16, a preamplifier 210, a write / read channel 220, a buffer 230, a controller 240, and a memory. 250 and a host interface 260.

The circuit configuration including the preamplifier 210 and the write / read channel 220 above will be referred to as a write / read circuit.

Various programs and data for controlling the disk drive are stored in the memory 250. In particular, FIGS. 3 and 4 are methods for improving the data transfer speed in the disk drives according to the first and second embodiments of the present invention. Programs and data are stored for executing the flowchart of FIG. In this case, the memory 250 is designed as a nonvolatile memory.

The buffer 230 temporarily stores data received from the host device (not shown) through the host interface 260 in the write mode under the control of the controller 240, and reproduces the data from the disc 12 in the read mode. One data is stored temporarily.

The controller 240 controls the disk drive as a whole, and in particular, analyzes the regularity of the command received from the host device through the host interface 260, and analyzes the prediction command to be received next if there is regularity, and analyzes it. After executing the preliminary preparation mode for executing the predicted prediction command, and after executing the preliminary preparation mode, the prediction command is compared with the next received command from the host device, and if the prediction command and the received command match, If not, control to execute the received command. The above preparatory mode is a mode in which the data stored in the predicted disk area is read from the disk and stored in the buffer when the predictive command is a read command, and converted to the predicted disk track position when the predictive command is a write command. This is a mode for moving (16). In addition, it is effective to determine the regularity of the command using the received command and sector position information.

That is, as an example, if the host device repeatedly plays and records an image as shown in FIG. 5, the host device reads 960 sectors of information into the LBA10000 as shown in FIG. It asks the disk drive to run a regular mode that writes sector information and reads back 960 sectors from LBA10960. In this case, the controller 240 of the disk drive analyzes commands and sector positions sequentially received from the host device and recognizes that there is some regularity in commands that are sequentially input.

When the controller 240 recognizes that the command input from the host device to the disk drive is regular, the controller 240 predicts a command to be input from the host device next. That is, in the case where a command requesting to operate as shown in Fig. 6 is input to the disk drive, after reading information of 960 sectors from the LBA10960, the next? The command to be entered to execute the part may predict that the command to write 960 sectors to LBA50960 will be entered.

Accordingly, controller 240 executes an advanced preparation mode to move transducer 12 to the position of LBA50960.

After executing such a preliminary preparation mode, if a command for writing 960 sectors to the LBA50960 is input in the same manner as the command inputted from the host device, the instruction predicted from the preliminary preparation mode is executed continuously. If a command different from the specified command is inputted, the input command is executed to be executed.

Controller 240 may also be designed as follows.

That is, the disk drive does not determine the regularity of the received command, but determines the regularity of the command in the host device, and sends a specific command (SET_REGULAR) to the disk drive from the host device to notify the user when it is determined that there is regularity. send. The controller 240 determines whether the specific command SET_REGULAR generated by the host device is received, and when the specific command SET_REGULAR is received, the controller 240 transitions to the prediction mode, analyzes the prediction command to be received next, and analyzes the predicted command. After executing the preliminary preparation mode for executing the preliminary preparation mode, and executing the preliminary preparation mode, the predicted command and the next received command from the host device are matched, and if the predicted command and the received command match, the predicted command is executed. If not, it can be designed to control the execution of the received command.

First, the operation of a general disk drive will be described.

In the data read mode, the disc drive amplifies the electrical signal sensed by the converter 16 (also called head) from the disc 12 to facilitate signal processing in the preamplifier 210. Then, in the recording / reading channel 220, the amplified analog signal is encoded into a digital signal that can be read by a host device (not shown), converted into stream data, and temporarily stored in the buffer 230, and then the host. It transmits to the host device through the interface 260.

In contrast, in the write mode of the data, the disk drive receives data from the host device through the host interface 260 and temporarily stores the data in the buffer 230, and sequentially outputs and stores the data stored in the buffer 230. The write current amplified by the preamplifier 210 is written to the disc 12 via the converter 16 after being converted by the read / write channel 220 into a binary data stream suitable for the write channel.

Next, a method of improving a data transfer speed between a disk drive and a host device according to the first embodiment of the present invention will be described with reference to the flowchart of FIG. 3.

First, the controller 240 of the disk drive analyzes a command input from the host device via the host interface 260 (S301).

It is determined whether the command inputted as a result of analysis in step 301 (S301) is regular (S302). Whether there is regularity in a command that is continuously input may be determined using the command and LBA information (sector information).

When it is determined that the command input from the host device is regular as a result of the determination in step 302 (S302), the controller 240 predicts the next command to be input from the host device based on the regularity of the command already input. (S303).

 If the predicted command is a read command as a result of the prediction in step 303 (S303), information on the expected sector is read from the LBA value expected in advance and stored in the buffer 230 (S304 and S305). That is, as an example, in the case of regularity as shown in FIG. 6, after writing 960 sectors of information to the LBA50000, the information of 960 sectors is read from the LBA10960 according to a command predicted before the next command is input from the host device. To execute the preliminary preparation mode for storing in the buffer 230.

If the predicted command is a write command as a result of the prediction in step 303 (S303), the converter 16 is moved to the position of the LBA value expected in advance (S306 and S307). That is, as an example, after reading 960 sectors of information from the LBA10960 in FIG. 6, before the next command is input from the host device, the preliminary preparation mode of moving the converter 16 to the position of the LBA50960 according to a command predicted in advance is executed. do.

In this way, after executing the preliminary preparation mode according to the predicted command, a command is received from the host device and the next command actually input from the host device is compared with the predicted next command (S308, S309).

If the next command actually input from the host device matches the predicted next command as a result of the comparison in step 309 (S309), the process returns to step 303 (S303) after the predicted command is performed (S310).

However, if the next command actually input from the host device and the next predicted command do not match as a result of the comparison in step 309 (S309), the feedback is ignored and the feedback is returned to step 301 (S301) after performing the input command. It becomes (S311).

Next, a method of improving a data transfer speed between a disk drive and a host device according to a second embodiment of the present invention will be described with reference to the flowchart of FIG. 4.

The difference between the second embodiment of the present invention according to the flowchart of FIG. 4 and the first embodiment of the present invention according to the flowchart of FIG. 3 is as follows.

In the first embodiment of the present invention, the disc drive side directly analyzes the command input from the host device to determine whether the input command is regular. In the second embodiment of the present invention, the disc in the host device at the host device side is determined. There is a fundamental difference in determining whether or not the command to be transmitted to the drive is regular and generating a specific command (SET_REGULAR) to notify the user if there is regularity.

Next, a second embodiment of the present invention will be described in detail.

First, the controller 240 of the disk drive determines whether a specific command SET_REGULAR indicating that a regular command is being transmitted from the host device via the host interface 260 is input (S401).

If the specific command SET_REGULAR is not input to the disk drive as a result of the determination in step 401 (S401), wait until the next command is input before executing the actual command input (S411).

However, when a specific command SET_REGULAR is input to the disk drive as a result of the determination in step 401 (S401), the controller 240 receives the next based on the regularity of the commands sequentially input after the disk drive is transitioned to the expected mode. The command to be predicted (S403).

If the predicted command is a read command as a result of the prediction in step 403 (S403), information on the expected sector is read from the LBA value expected in advance and stored in the buffer 230 (S404 and S405). That is, as an example, after writing 960 sectors of information to the LBA50000 in FIG. 6, before the next command is input from the host device, 960 sectors of information is read from the LBA 10960 and stored in the buffer 230 according to a predicted command. Initiate Prep mode.

If the predicted command is a write command as a result of the prediction in step 403 (S403), the converter 16 is moved to the position of the LBA value expected in advance (S406 and S407). That is, as an example, after reading 960 sectors of information from the LBA10960 in FIG. 6, before the next command is input from the host device, the preliminary preparation mode of moving the converter 16 to the position of the LBA50960 according to a command predicted in advance is executed. do.

As such, after executing the preliminary preparation mode according to the predicted command, a command is received from the host device and the next command actually input from the host device is compared with the predicted next command (S408, S409).

As a result of the comparison of step 409 (S409), if the next command actually predicted and the next predicted command match, the predicted command is fed back to step 403 (S403), and the above steps are repeated. (S410).

However, if the next command actually input from the host device and the predicted next command do not match as a result of the comparison in step 409 (S409), the inputted command is ignored (S411).

As described above, when the disk drive determines the regularity of the command input from the host device, when the predetermined regularity exists, the seek time can be reduced by predicting the next command in advance and preceding the predicted next command. The data transfer rate can be increased. In particular, when the next predicted command is a read command, the seek time and data transfer time can be shortened by reading the predicted data beforehand and storing the predicted data in the buffer 230 before waiting for the next command. It became.

In addition, when the stream is repeatedly received as shown in FIG. 7, the disk drive may predict a next received stream and program the data to be processed before the actual command is input.

The invention can be practiced as a method, apparatus, system, or the like. When implemented in software, the constituent means of the present invention are code segments that necessarily perform the necessary work. The program or code segments may be stored in a processor readable medium or transmitted by a computer data signal coupled with a carrier on a transmission medium or network. Processor readable media includes any medium that can store or transmit information. Examples of processor-readable media include electronic circuits, semiconductor memory devices, ROMs, flash memory, erasable ROM (EROM), floppy disks, optical disks, hard disks, optical fiber media, radio frequency (RF) networks, Etc. Computer data signals include any signal that can propagate over transmission media such as electronic network channels, optical fibers, air, electromagnetic fields, RF networks, and the like.

Specific embodiments shown and described in the accompanying drawings are only to be understood as an example of the present invention, not to limit the scope of the invention, but also within the scope of the technical spirit described in the present invention in the technical field to which the present invention belongs As various other changes may occur, it is obvious that the invention is not limited to the specific constructions and arrangements shown or described. That is, it is a matter of course that the present invention can be applied not only to various disk drives including hard disk drives, but also to various kinds of data storage devices.

As described above, according to the present invention, the regularity of the command input to the disk drive is analyzed to predict the next command to be input in advance if there is regularity, and then execute the predicted next command before the actual command is input. By controlling so that the data transmission speed can be increased.

Claims (18)

In the control method of the data storage system, (a) analyzing a command received from the host device; (b) determining the regularity of the received command; (c) if there is regularity of a command received from the host device as a result of the determination of step (b), predicting a next command to be received based on the regularity; (d) executing a preliminary preparation mode for executing the prediction command; And and (e) executing the prediction command only when the prediction command and the next command received from the host device coincide with each other. The method of claim 1, wherein executing the prediction command (e1) after executing the preceding preparation mode, comparing the prediction command with a next received command from the host device; And (e2) if the prediction command matches the received command as a result of the determination in step (e1), executing the prediction command; otherwise, further comprising executing the received command. How to improve data transfer speed in data storage system. The method of claim 1, wherein the preliminary preparation mode is a mode in which data stored in a disk area expected in advance is read and stored in a buffer when the prediction command is a read command. . 2. The method of claim 1, wherein the preliminary preparation mode is a mode for moving the head to a predicted disc track position when the prediction command is a read command. 2. The method of claim 1, wherein the regularity of the command is determined by using received command and sector position information. In the control method of the data storage system, (a) determining whether a specific command is received from the host device indicating that the regular command is being transmitted; (b) when the particular command is received, transitioning to an expected mode to analyze the next received prediction command; And and (c) executing a preliminary preparation mode for executing the prediction command. The method of claim 6, (d) after executing the preceding preparation mode, comparing the prediction command with a next received command from the host device; And (e) executing the predicted command if the predicted command and the received command match as a result of the determination of step (d), and if not, executing the received command. How to improve data transfer speed in data storage system. 7. The method of claim 6, wherein the preliminary preparation mode is a mode in which data stored in a disk area that is predicted in advance when the prediction command is a read command is read and stored in a buffer. . 7. The method of claim 6, wherein the preparatory mode is a mode for moving the head to a predicted disk track position when the predictive command is a read command. In the data storage device, A host interface for performing data transmission / reception processing with the host device; A memory containing firmware and control information for controlling the disk drive; A buffer for storing data received from the host device through the host interface in a write mode and storing data reproduced from the disc in a read mode; Analyzing the regularity of the command received from the host device through the host interface, predicting the next command to be received based on the regularity when there is regularity, and executing a predictive preparation mode for executing the predicted command. A controller configured to execute the predicted command only when the predicted command matches a next received command from the host device; And And a write / read circuit for writing data received through the host interface and stored in the buffer to a disc, or performing data processing for reading data from the disc and storing the data in the buffer. . The method of claim 10, wherein the controller After executing the preceding preparation mode, the prediction command is compared with a next received command from the host device, and if the prediction command and the received command match, the prediction command is executed. And control to execute a received command. The disk drive of claim 10, wherein the preparatory mode is a mode in which data stored in a disk area expected in advance is read and stored in a buffer when the prediction command is a read command. The disk drive according to claim 10, wherein the preceding preparation mode is a mode for moving the head to a predicted disk track position when the prediction command is a read command. The disk drive of claim 10, wherein the regularity of the command is determined by using the received command and sector position information. In the data storage device, A host interface for performing data transmission / reception processing with the host device; A memory containing firmware and control information for controlling the disk drive; A buffer for storing data received from the host device through the host interface in a write mode and storing data reproduced from the disc in a read mode; Determining whether a specific command indicating that a regular command is being transmitted from the host device is received, and when the specific command is received, transition to an expected mode to analyze a prediction command to be received next, and execute the prediction command. A controller for controlling to execute a preliminary preparation mode for the apparatus; And And a write / read circuit for writing data received through the host interface and stored in the buffer to a disc, or performing data processing for reading data from the disc and storing the data in the buffer. . The method of claim 15, wherein the controller After executing the preceding preparation mode, the prediction command is compared with a next received command from the host device, and if the prediction command and the received command match, the prediction command is executed. And control to execute a received command. 16. The disk drive of claim 15, wherein the preparatory mode is a mode in which data stored in a disk area expected in advance is read and stored in a buffer when the prediction command is a read command. The disk drive according to claim 15, wherein the preceding preparation mode is a mode for moving the head to a predicted disk track position when the prediction command is a read command.

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