JPH06282944A - Disk device and data block writing method - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to improve the write processing efficiency of a disk device. A disk device 2 having a buffer memory 18 for storing a plurality of data blocks, which writes data blocks after erasing a designated area on a disk medium 19 and writes data from a host device 1 When the write data block designated by the command is stored in the buffer memory 18, when the command indicating the command is received, the host device 1 is notified of the command reception completion or the command execution end report, and the next command reception preparation is completed. A plurality of received commands are sent to the disk medium 19
Instructs to write a data block in a continuous area, and if the next command is received before the completion of the erase processing for the previously received command, the erase processing is executed collectively for multiple commands. After that, a plurality of data blocks are collectively written.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to erasing a disk medium and then writing the data, or writing the data and then performing a verifying process for confirming the validity of the written data, or an erasing process. The present invention relates to a disk device that executes both the verifying process and the verifying process, and particularly when the writing of data is sequentially instructed by a plurality of commands in a continuous area of the disk medium, the erasing process or the verifying process is collectively performed on the plurality of commands The present invention relates to a disk device and a data block writing method, which are executed by the above method and improve write processing efficiency.

In general, an optical disk device has a low error rate. Therefore, after writing data on a disk medium, this data is read out and compared with the written data, and a verify process for checking whether there is an error and confirming the validity of the data is performed. is necessary.

Also in the magnetic disk apparatus, the same tendency is observed in the case of high recording density, so that it is not rare that the verify processing is carried out for particularly important data.

Further, in the magneto-optical disk device, an erase process is required in advance before the data write process,
In addition, verify processing is also necessary. Therefore, although the number of times the head is positioned increases and the data write processing efficiency decreases, it is desirable to be able to improve this processing efficiency.

[0005]

2. Description of the Related Art FIG. 8 is a block diagram illustrating an example of a disk device, and FIG. 9 is a diagram illustrating an example of a command table.

The processor 3 of the disk device 2 is a ROM
9 (A) which is provided in the RAM 10 when the program stored in the RAM 9 is read and operated to control the interface circuit 4 to receive the command sent by the host device 1.
The command table 13 as shown in accordance with an instruction address pointer, a write address a ₀ ~a _n on the disk medium (not shown) and respectively corresponding to the write address, sequentially and the data block length l ₀ to l _n Record.

The RAM 10 includes a processor 3 as shown in the drawing.
There is provided a work area 11 for storing data necessary for processing, a buffer area 12 for storing a data block to be transferred as a buffer memory, and a command table 13 as described above.

After the command table 13 is recorded, the processor 3 instructs the positioning control circuit 7 to the track on which the head 6 is positioned, supplies a drive current to the carriage 8, and drives a motor (not shown) of the carriage 8. Then, the head 6 attached to the carriage 8 is positioned on the designated track.

When the received command instructs writing, the processor 3 causes the host device 1 to send the write data through the interface circuit 4 at the same time, and the buffer area 12 provided in the RAM 10 from the interface circuit 4 via the bus. To store the data.

When the head 6 is positioned at the designated address, the processor 3 controls the write / read circuit 5 to erase the area on the disk medium corresponding to the data block length recorded in the command table 13. After that, when the head 6 is again positioned at the designated address, the write / read circuit 5 is controlled to make the RAM 1
The data stored in the buffer area 12 of 0 is transferred to the write / read circuit 5 via the bus, the write data is sent to the head 6, and the data block of the specified length is written from the specified address. No

When the received command directs reading, the processor 3 positions the head 6 on the designated track and stores the data block read by the head 6 in the buffer area 12 via the write / read circuit 5. After that, the data is transferred to the host device 1 via the interface circuit 4.

FIG. 10 is a time chart for explaining the operation of the prior art. The interface circuit 4 is, for example, C _{1 to} C ₃ from the host device 1 as shown in the host device of FIG.
When three commands shown by are received continuously,
As indicated by IF, when a command indicated by CMD for each command and data indicated by DATA are received, they are stored in the buffer area 12 and the command table 13 also stores the address a _i and the data block in the column designated by the address pointer. The length l _i is recorded, and the operation of sending the status indicated by S to the host device 1 is executed three times.

To write data on the disk medium, as shown in the write operation of FIG. 10, the head 6 is positioned during the period indicated by P, erase is performed during the period indicated by ERASE, and again during the period indicated by P. The operation of positioning the head 6 and writing data in the period indicated by WRITE is repeated three times.

The first period indicated by P is long because there is a movement time of the carriage 8 and the second and subsequent times are often waiting for the rotation of the disk medium, so that the period is short.

The second and subsequent rotations wait for rotation because the head 6 moves in the gap between the data blocks during the preparation time for shifting from the data write processing instructed by the command C ₁ to the erase processing of the command C _2. If it is completed within the time period required for rotation, waiting for rotation is not necessary, but since it takes time required for changing the polarity of the magnetic field of the head 6 and changing the condition setting of the internal circuit, preparation is not completed within the gap passage time. Requires waiting for rotation of the disk medium.

FIG. 11 is a flow chart for explaining the operation of the prior art. When the processor 3 is idle,
In step (1), the operation of checking the command table 13 for unexecuted commands that are not being executed is repeated. That is,
Of the flags f _{0 to} f _n indicating the command end of the command table 13 shown in FIG.

If there is a command that has not been executed and is not being executed, it is checked if it is a write command in step (2). If it is not a write command, command processing other than the write command is performed in step (3) and step (1 ) Return to processing.

If the write command is the write command in step (2), the processor 3 writes the pointer value of the write command to the address pointer pointing to the address a _i of the command table 13 in which this command is recorded in step (4). i is set, and the head 6 is positioned at the address a _i in step (5).

Then, in step (6), erase in the range of the data block length l _i read from the command table 13 is started. The processor 3 monitors the end of the erase processing in step (7). When the erase is completed, the processor 3 checks in step (8) whether an error has occurred. If an error occurs, error processing is performed in step (14). If not, the head 6 is positioned at the address a _i in step (9).

Then, in step (10), the l
Write a data block of length _i , monitor the end of the writing process in step (11), and when the writing process ends, check whether an error has occurred in step (12). If an error occurs, process the error in step (14). But if there are no errors,
In step (13), the flag f _i of the command table 13 is set, and the process returns to step (1).

As described above, for example, in a magneto-optical disk device which is connected to a computer system to operate, when writing data, the area of the disk medium in which the data is to be written is erased in advance, and then the data is written. To do.

In order to guarantee the quality of the write data, after the data writing is finished, this data is read out, compared with the write data, and a verify process for checking whether there is an error or not is executed.

Therefore, in order to complete one write command, first, the head 6 is positioned in the designated address area of the disk medium, the erase process is executed, and the head 6 is positioned again in the designated address area. When the data is written and the data is guaranteed, the head 6 is again positioned in the designated address area to read the data.

Therefore, in order to complete one write command, the positioning process of the head 6 is performed at least twice, and when the verify process is performed, the head positioning process is performed three times.

[0025]

As described above, conventionally, it is necessary to perform the head positioning processing a plurality of times to complete one write command, but normally a command is issued to a plurality of consecutive data blocks. Since the write command is issued up to the number of data blocks corresponding to the capacity of the buffer area 12, the data writing process is completed by the head positioning process twice or three times.

However, in the case of a computer system in which the higher-level device 1 issues write commands continuously in small data block units, the disk device 2 executes sequential processing for each command, so the capacity of the buffer area 12 is reduced. Regardless of this, since the number of times of head positioning processing of the number of commands × 2 or the number of commands × 3 occurs, there is a problem that the write processing efficiency is deteriorated and the performance of the computer system is significantly reduced.

In view of such a problem, the present invention divides a small data block into a continuous large data block area on a disk medium, and when a write command is continuously given, The purpose is to minimize the number of positioning processes of the head 6 by collectively executing erase processing or verify processing for a plurality of write commands.

[0028]

FIG. 1 is a block diagram for explaining the principle of the present invention. The disk device 2 includes a buffer memory 18 for storing a plurality of data blocks instructed to be written, and erases a specified area on the disk medium 19 for writing using the head 6 before writing data. After the processing is executed, the data block read from the buffer memory 18 is written in this designated area.

Then, when one command instructing data writing from the host device 1 is received and the write data block instructed by the one command is stored in the buffer memory 18, the host device 1 receives the command A report means 14 for making a completion report or a command execution completion report to complete preparation for receiving the next command, and writing a plurality of data blocks in a continuous area on the disk medium 19 by the plurality of received commands. Detecting means 15 for detecting whether or not the command is received, and notifying means 16 for detecting and notifying that the next command has been received before the completion of the erase process for the previously received command. Erase processing is executed collectively for the commands, and then multiple data blocks corresponding to these multiple commands are collectively written. When the detection unit 15 detects a write instruction of a plurality of data blocks, the erase process is continued while the notification unit 16 notifies the reception of the next command. After the execution, a plurality of data blocks are collectively written in the area on the disk medium 19 where the erase processing is completed.

The disk device 2 also has a buffer memory (18) for storing a plurality of data blocks instructed to be written.
And executing the writing of the data block read from the buffer memory (18) using the head 6 on the area designated for writing on the disk medium (19), and then validating the written data block. Verify processing for confirming

Then, when one command instructing data writing from the host device 1 is received and the write data block instructed by this one command is stored in the buffer memory 18, the command is received by the host device 1. And a command execution end report to complete preparations for receiving the next command, and a plurality of received commands write a plurality of data blocks in a continuous area on the disk medium 19. Before the completion of writing of the data block designated by the previously received command, the detection means 15 for detecting whether or not
After the notification means 16 that detects and notifies that the next command has been received and the write processing of the plurality of data blocks designated by the plurality of commands are collectively executed, the plurality of commands corresponding to the plurality of commands are executed. Write means 17 for collectively executing verification processing on data blocks is provided, and when the detecting means 15 detects a write instruction of a plurality of data blocks, the notifying means 16 notifies the next command reception. While the data block is being written, the writing process is continuously executed, and then the verifying process is collectively performed on the plurality of data blocks for which the writing is completed.

The disk device 2 also has a buffer memory 18 for storing a plurality of data blocks instructed to be written.
Before executing the data writing, the head 6 is used to perform the erase process on the area specified for writing on the disk medium 19, and then the data block read from the buffer memory 18 is written. After that, a verify process is performed to confirm the validity of the written data block.

Then, when one command instructing data writing from the host device 1 is received and the write data block instructed by this one command is stored in the buffer memory 18, the command is received by the host device 1. And a command execution end report to complete preparations for receiving the next command, and a plurality of received commands write a plurality of data blocks in a continuous area on the disk medium 19. A detection means 15 for detecting whether or not the following command is received, and a notification means 16 for detecting and notifying that the next command has been received before the erase process for the previously received command is completed,
After the erase process is executed collectively for a plurality of commands, a plurality of data blocks corresponding to the plurality of commands are collectively written, and then a plurality of data blocks corresponding to the plurality of commands are written. A writing means 17 for collectively executing the verify process is provided, and when the detecting means 15 detects a write instruction of a plurality of data blocks, while the notifying means 16 notifies the next command reception, After the erase process is continuously executed, the process of collectively writing the plurality of data blocks to the area on the disk medium 19 where the erase process is completed is continuously executed, and then the writing is performed. Collectively executes verification processing for multiple data blocks that have completed

[0034]

With the above-described configuration, the disk device 2 divides a large data block area on the disk medium 19 into small data blocks and continuously issues write commands. In case,
Since the erase process, the data block write process, and the verify process for a plurality of write commands can be executed at the same time, the number of positioning processes of the head 6 can be minimized.

[0035]

FIG. 2 is a time chart for explaining the operation of the present invention. In the present invention, the operation of the processor 3 of the disk device 2 shown in FIG. 8 and the command table 13 are different from those of the prior art. Then, as shown in FIG. 9 (B), the command table 13 has an Op column added to FIG. 9 (A) to record bits o _{0 to} o _n indicating whether or not the data block transfer is completed. Is provided.

The processor 3 operates according to the instructions of the program read from the ROM 9, controls the interface circuit 4, and as shown in the host device of FIG. 2, the host device ₁ sends _three commands, for example, C _{1 to} C _3. , The command indicated by CMD and D
When the data indicated by ATA is received, it is stored in the buffer area 12 of the RAM 10, and the command table 13 shown in FIG.
The operation of recording the address a _i and the data block length l _i and transmitting the status indicated by S to the higher-level device 1 is executed three times.

In the processor 3, the interface circuit 4 is SCSI-2 (American National Standards Institute ANSI X3T9.2 /
When the command queuing method described in 86-109) is used, a command reception completion report (a command is received but execution is not completed) is sent to the host device 1 when the status is transmitted.

When the interface circuit 4 does not use the command queuing method, the processor 3 reports the end of command execution (command execution is completed, that is, data writing to the disk medium is completed. (Indicating that) is performed to the host device 1 at the time of sending the status.

Data writing to the disk medium is performed by the processor 3 when writing a data block after executing erase as shown in the writing operation of FIG.
Position the head 6 in the period indicated by P, and
During the period indicated by E, the erase is continuously executed on the area on the disk medium corresponding to the data block length designated by the three commands.

In this case, since the command C ₂ is received before the erase process for the command C ₁ is completed,
When the area on the disk medium where the data block is written by the command C ₁ is continuous with the area on the disk medium where the command C ₂ writes, the erase is subsequently executed.

[0041] Before the erase processing for the command C ₂ is completed, since the command C ₃ is received, for a region on the disk media data block with the command C ₂ is written, the command C ₃ is written When the designated area on the disk medium is continuous, the erase is continuously executed.

In the present embodiment, since the next command is not received before the erase of the command C ₃ , the processor 3
Position the head 6 again during the period indicated by P, and
During the period indicated by ITE, the contents of the command table 13 are referred to and the data blocks designated by the three commands are continuously written.

When the verify process is performed after writing the data, as shown in the write operation of FIG. 2, the head 6 is positioned during the period indicated by P, and three commands are issued during the period indicated by WRITE. The data block is continuously written to a designated area on the disk medium.

[0044] In this case, before the writing process for the command C ₁ is completed, since the command C ₂ is received, for a region of the data blocks on the disk medium has been written in the command C _1, the command C ₂ is When the area on the disk medium for which writing is instructed is continuous, the writing process is subsequently executed.

Since the command C ₃ is received before the writing process for the command C ₂ is completed, the command C ₃ is written in the area of the data block written by the command C ₂ on the disk medium. When the area on the disk medium instructing is continuous, the writing process is executed subsequently.

In the present embodiment, since the next command is not received before the writing process of the command C ₃ is completed, the processor 3 positions the head 6 again during the period indicated by P, and V
The verify process for three data blocks is continuously performed in the period indicated by ERIFY.

When the data block is written after the erase is executed and the verify process is further performed,
As shown in the write operation of FIG. 2, the head 6 is positioned during the period indicated by P, and similarly to the above, during the period indicated by ERASE, the head 6 is continuously positioned in the area on the disk medium corresponding to the data block length designated by the three commands. Erase is performed, the head 6 is positioned again in the period indicated by P, and W
The operation of continuously writing the data blocks designated by the three commands to the designated area on the disk medium is executed during the period indicated by RITE, the head 6 is positioned again during the period indicated by P, and VERIFY is performed. The verify process for three data blocks is continuously performed in the period shown.

FIGS. 3, 4, 5, 6 and 7 are flow charts for explaining the operation of the present invention. 3 to 5 relate to the transfer of command and data blocks between the higher-level device 1 and the interface circuit 4, in FIG. 3, the processor 3 is idle when the interface circuit 4 uses the command queuing method. In the state, the activation from the host device 1 is monitored via the interface circuit 4 as shown in step (1). Then, when the device number is specified by the higher-level device 1 and activated, the step
The command is received in (2), and it is checked in step (3) whether it is a write command.

If it is not a write command, step (7)
After processing other commands with, return to the processing of step (1), and if it is a write command, check whether data transfer is possible in step (4). That is, it is checked whether or not there is room for storing a data block in the buffer area 12 (hereinafter abbreviated as a buffer memory), and if data transfer is possible, after the data block is transferred and stored in the buffer memory in step (8), Move to the processing in step (5).

If there is no room to store the data block in the buffer memory, the command information is stored in the command table 13 in step (5). That is, the RAM 10
Command table 13 shown in FIG. 9 (B)
In the case where the write address a _i on the disk medium, the data block length l _i corresponding to the write address, and the data block can be stored in the Op column in step (8) according to the instruction of the address pointer. Records bit o _i .

Then, in step (6), the command reception completion is reported to the host device 1 by releasing the connection with the host device 1, and the process returns to step (1). When the processor 3 is in the idle state, in step (9) the command table 1
Check if there is a completed command on 3. That is, the flags f _{0 to} f _n indicating the command end of the command table 13
Among recombine the command there flag f _i of column address pointer specifies is set an upper apparatus 1 in step (10), is set in the flag f _i in step (11) With respect to the command, the command end status is reported to the host device 1, and the process returns to step (9).

Further, when the processor 3 is in the idle state, it checks in step (12) if there is a command for which data has not been transferred in the command table 13. That is, commands and data block length of the command table 13 have been recorded, in a bit o ₀ ~ O _n the Op field indicating the end of data transfer, bit o _i of column address pointer specifies is not recorded Check if there is a command.

When there is a command for which data has not been transferred, the processor 3 rejoins the host device 1 in step (13) and transfers and stores the data block in the buffer memory in step (14).

Then, in step (15), the connection with the host device 1 is released, and the process returns to step (12). The processes of steps (1) to (8), steps (9) to (11), and steps (12) to (15) shown in FIG.
It is executed asynchronously and in parallel by an interrupt function or the like.

In FIG. 4, when the interface circuit 4 does not use the command queuing method, the processor 3 monitors the start-up from the host device 1 via the interface circuit 4 as shown in step (1) in the idle state. is doing. When the host device 1 is activated by designating a machine number, the command is received in step (2), and it is checked in step (3) whether it is a write command.

If it is not a write command, step (8)
After processing other commands with, return to the processing of step (1), and if it is a write command, check whether data transfer is possible in step (4). That is, it is checked whether there is room to store the data block in the buffer memory, and if data transfer is possible, the data block is transferred and stored in the buffer memory in step (9), and then the process of step (5) is performed. To do.

If there is no room to store the data block in the buffer memory, the command information is stored in the command table 13 in step (5). That is, the RAM 10
Command table 13 shown in FIG. 9 (B)
In the case where the write address a _i on the disk medium, the data block length l _i corresponding to this write address, and the data block can be stored in the Op column in step (9) according to the instruction of the address pointer. Records bit o _i .

The processor 3 checks in step (6) whether the data transfer is completed. When the transfer of the data block for one write command is completed, the processor 3 reports the command completion status to the host device 1 in step (10).
Returning to the process of (1), if the data transfer is not completed in step (6), the connection with the host device 1 is released in step (7) and the process returns to step (1).

As shown in step (1) of FIG. 5, the processor 3 checks whether the remaining data transfer is possible in the idle state, and there is room for storing the data block in the buffer memory, and the data transfer becomes possible. , At step (2), it is rejoined with the host device 1, and at step (3), the data block is transferred and stored in the buffer memory.

Then, it is checked in step (4) whether the data transfer is completed, and when the data block transfer for one command is completed, the command completion status is reported to the higher-level device 1 in step (6) and the step (1 ), If the data transfer is not completed, the connection with the host device 1 is released in step (5), and the process returns to step (1).

The processes of FIGS. 4 and 5 are also executed asynchronously and in parallel by the interrupt function or the like as described above. FIG. 6 shows an operation in the case of writing a data block after the erase processing. In step (1), the processor 3 monitors the command table 13 for unexecuted and unexecuted commands. If there is an unexecuted or unexecuted command,
Check if it is a write command in step (2).

If it is not a write command, step (11)
Steps after processing commands other than write commands with
Return to the process of (1), if it is a write command, step
In (3), set the pointer value i of the write command to the address pointer and set the pointer offset value j of the command to 0.
Initialize to.

The processor 3 executes the RAM in step (4).
Address a _i is set in the address variable A of the data block set in the work area 11 on 10 and block length l _i is set in the variable L of the data block length.

Then, the head 6 is positioned at the address A set in step (5). That is, the head 6 is positioned at the address a _i , and the erase process is started in step (6). That is, the write / read circuit 5 is controlled to supply an erase current to the head 6, the data block length l _i designated by the address a _i of the command table 13 is read, and the address a _i to l _{i of the} disk medium is read. The process of erasing the area of length is started.

Next, the processor 3 checks in step (7) if there is a write command in the command table 13 that has not been executed and is not being executed. That is, the command table 13 is searched for a command whose flag is not set and which is not being executed, and if there is a command, it is checked in step (12) whether the data blocks are continuous.

[0066] That is, from the boundary of the area on the disk medium obtained from the data block length l _i of the address a _i address pointer specifies, if the boundary next address a _{i + 1} designates are continuous, step At (13), 1 is added to the pointer offset value j, and l _{i + j} is added to L.

Then, the operation of returning to the process of step (7) is repeated the number of times the commands C _{1 to} C ₃ are repeated. And
In step (8), it is checked whether the L block erase processing is completed. That is, it is checked whether the erase of the total length of the continuous data block lengths of the commands C _{1 to} C ₃ is completed.

If it is not finished, the process returns to the step (7). If it is finished, it is checked in the step (9) whether an error has occurred.
If an error occurs, error processing is performed in step (18). In the case of the command queuing method, this error processing can notify an error for each command by the tag information, and when it is not the command queuing method,
The error is reported in the deferred error format (the format that specifies the error occurrence command).

If no error has occurred in step (9), the processor 3 sets L to l _i + l _{i + 1 in} step (10).
+ ··· + l _{i + j} Processor 3 goes to step (14)
To start writing data to the area indicated by L,
In (15), wait for the end of the data writing process, and then step
Check in (16) if an error has occurred. If an error occurs, step
Move to the process of (18), and if there is no error, step
At (17), flags f _i, ... _, F _{i + j} indicating the command end in the command table 13 are set. That is, all the flags corresponding to the addresses for which the data writing process has been completed are set. Then, the process returns to step (1).

FIG. 7 shows the operation when the verify process is performed after the data write process. 6 and 7, the steps
Whether (1) has not been executed in the command table and there is a command whose write data has been transferred to the buffer memory because it is not being executed, step (6) starts the data writing process, and step (7) writes to the command table. Whether there is a write command that has not been executed and is not being executed and the write data has been transferred to the buffer memory, step (8) is the end of the L block write processing, and step (14) is the verify processing for the area indicated by L. Start and step (15)
The other operations are the same, except that the verify processing is completed.

When the erase process is performed, the data write process is performed, and the verify process is further performed, the step (16) in FIG. 6 is followed by the step (14) in FIG. 7 and subsequent steps. You can

[0072]

As described above, according to the present invention, commands are continuously issued at high speed, and data is written after erase processing, and data is written and verify processing is performed. Regardless of the number of issues,
The head positioning process only needs to be performed a maximum of two times, and even if the erase process and the verify process are required, the head positioning process can be performed a maximum of three times, so that the performance degradation of the disk device can be minimized.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating the principle of the present invention.

FIG. 2 is a time chart explaining the operation of the present invention.

FIG. 3 is a flowchart (1) for explaining the operation of the present invention.

FIG. 4 is a flowchart (part 2) explaining the operation of the present invention.

FIG. 5 is a flowchart (No. 3) for explaining the operation of the present invention.

FIG. 6 is a flowchart (part 4) explaining the operation of the present invention.

FIG. 7 is a flowchart (5) explaining the operation of the present invention.

FIG. 8 is a block diagram illustrating an example of a disk device.

FIG. 9 is a diagram illustrating an example of a command table.

FIG. 10 is a time chart explaining the operation of the conventional technology.

FIG. 11 is a flowchart illustrating the operation of the conventional technique.

[Explanation of symbols]

 1 host device 2 disk device 3 processor 4 interface circuit 5 writing / reading circuit 6 head 7 positioning control circuit 8 carriage 9 ROM 10 RAM 11 working area 12 buffer area 13 command table 14 reporting means 15 detecting means 16 notifying means 17 writing means 18 Buffer memory 19 Disk medium

Claims (4)

[Claims] 1. An erasing process for an area designated for writing on a disk medium (19), comprising a buffer memory (18) for storing a plurality of data blocks instructed to be written, before writing the data. The disk device (2) that writes the data block read from the buffer memory (18) to the specified area after executing the command, and receives one command instructing the data writing from the upper device (1). When the write data block designated by the one command is stored in the buffer memory (18),
A command means (14) for sending a command reception completion report or a command execution completion report to the host device (1) to complete preparations for receiving the next command, and a plurality of received commands for the disk medium (19). The detection means (15) that detects whether or not it is instructed to write multiple data blocks in the continuous area above, and the next command is received before the erase processing for the previously received command is completed. A notification means (16) for detecting and notifying that a plurality of commands have been erased, and a plurality of data blocks corresponding to the plurality of commands are collectively written after the erase processing is collectively executed. When the detecting means (15) detects the write instruction of a plurality of data blocks, the erase means is provided while the notifying means (16) is notifying the reception of the next command. Continue processing After, the area of the disc on the medium (19) in which the erase process is complete to the disk device, characterized in that writing collectively a plurality of data blocks. 2. A disk medium comprising a buffer memory (18) for storing a plurality of data blocks instructed to be written.
(19) Write the buffer memory in the specified area
A disk device (2) that performs verification processing to confirm the validity of the written data block after writing the data block read from (18), and the data from the host device (1). When receiving one command instructing to write and storing the write data block instructed by the one command in the buffer memory (18),
A command means (14) for sending a command reception completion report or a command execution completion report to the host device (1) to complete preparations for receiving the next command, and a plurality of received commands for the disk medium (19). The detection means (15) for detecting whether or not it is instructed to write a plurality of data blocks in a continuous area above, and before the completion of writing the data blocks instructed by the previously received command, Notification means (16) for detecting and notifying that the command has been received, and after collectively executing the write processing of the plurality of data blocks designated by the plurality of commands, a plurality of commands corresponding to the plurality of commands are executed. Writing means (17) for collectively executing verification processing on the data blocks of, and when the detecting means (15) detects a write instruction of a plurality of data blocks, the notifying means (16) While notifying the command reception, after continuously executing the write processing of the data blocks, the disk apparatus characterized by performing collectively verifying process for a plurality of data blocks 該書 lump is completed. 3. An erase process of a region designated for writing on a disk medium (19), comprising a buffer memory (18) for storing a plurality of data blocks instructed to be written, before writing the data. After executing, write the data block read from the buffer memory (18), and then perform a verify process to confirm the validity of the written data block. When receiving one command instructing data writing from the upper device (1) and storing the write data block instructed by the one command in the buffer memory (18),
A command means (14) for sending a command reception completion report or a command execution completion report to the host device (1) to complete preparations for receiving the next command, and a plurality of received commands for the disk medium (19). The detection means (15) that detects whether or not it is instructed to write multiple data blocks in the continuous area above, and the next command is received before the erase processing for the previously received command is completed. A notification means (16) for detecting and notifying that a plurality of commands have been erased, and a plurality of data blocks corresponding to the plurality of commands are collectively written after the erase processing is collectively executed. Write means (17) for collectively executing verify processing on a plurality of data blocks corresponding to the plurality of commands, and the detection means (15) is provided for writing a plurality of data blocks. When the notifying means (16) is notifying the reception of the next command, the erase process is continuously executed, and then the erase process is completed in the area on the disk medium (19). On the other hand, the disk device is characterized in that, after continuously executing a process of collectively writing the plurality of data blocks, a verify process is collectively performed on the plurality of data blocks for which writing has been completed. 4. An erasing process of a region designated for writing on a disk medium (19), comprising a buffer memory (18) for storing a plurality of data blocks instructed to be written, before writing the data. In the disk device (2) that executes the verification process for confirming the validity of the written data block after executing the writing of the data block read from the buffer memory (18). When receiving one command instructing data writing from the higher-level device (1) and storing the write data block instructed by the one command in the buffer memory (18),
By issuing a command reception completion report or a command execution completion report to the host device (1), the erase process for the area on the disk medium (19) designated by the one command is started, and the host device The next command is sent from (1) to create command queuing before the end of the erase process, and referring to the command queuing, a plurality of received commands are consecutive on the disk medium (19). When it is instructed to write multiple data blocks to the area, the erase operation is collectively performed on the continuous area on the disk medium (19) specified by the multiple commands, and then the command is executed. After writing the data blocks specified by the command waiting for processing by queuing all at once, the verify process is performed on the multiple data blocks that have been written all at once. Data block writing method being characterized in that so as to run.