JPH0831247B2 - Storage device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a storage device, and more particularly to a storage device such as an optical disk device or a magnetic disk device.

[Prior art]

When information cannot be correctly recorded in a storage device such as an optical disk device or a magnetic disk device due to a defect in the medium, the entire track is recorded as a defective track, or the information is recorded on an alternative track, or one sector is recorded as a defective sector. A method of recording information in an alternative sector is generally adopted.

Conventionally, when it is detected that the information written in these storage devices includes an error, the software sequentially executes a read command to search for an unused alternative track or alternative sector, or a management table is searched. It is necessary to manage an unused alternative track or an alternative sector by using it, and there is a drawback that error processing by software becomes complicated.

[Object of the Invention]

It is an object of the present invention to detect that the information recorded on a recording medium contains an error when executing a verify command for checking whether or not the information is correctly recorded on the recording medium. Then, a storage device that solves the above-mentioned drawbacks is provided by displaying that an error is detected in the status information and displaying the address of the track or sector containing the error and the address of an unused alternative track or alternative sector. To do.

[Structure of Invention]

According to the present invention, instruction execution control means for decoding and controlling execution of instructions, error checking means for checking whether or not information read from a recording medium contains an error, and information on the recording medium A write state inspecting means for inspecting whether or not it has been written, and the instruction decoded by the instruction execution control means is a verify instruction for inspecting whether or not information is correctly recorded on the recording medium. At this time, the error checking means checks whether or not there is an error in the recorded information, and when an error is detected, the write state checking means preliminarily substitutes an unused information recording area that has not been written. By adding the address of an alternative information recording area to the status information indicating the execution result of the verify command by searching Location can be obtained.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an information recording format in an embodiment of the storage device of the present invention, and FIG. 2 is a circuit block diagram showing an embodiment of the storage device of the present invention.

In FIG. 1, the information recording format is a sector system,
A plurality of data sectors 11, 12, 13, ~ 1n for recording information on one track and data sectors 11, 12, 13, ~ 1n
There are a plurality of spare sectors 21, 22, ... to 2m for spare used when any one of them is defective.

Next, referring to FIG. 2, a storage device 60 according to an embodiment of the present invention.
Is an input / output device connection circuit 61, an instruction execution control circuit 62, an error check circuit 63, a write state check circuit 64, a storage drive connection circuit 6
5, including a plurality of storage drives 66a, 66i.

Next, the operation of this embodiment will be described. When writing information to a data sector in a normal storage drive, the input / output device 50 sequentially issues a positioning command, a write command, and a verify command to the storage device 60 to write the information and confirm that the information has been written correctly. I do.

When the input / output device 50 issues a positioning command to the storage device 60 via the signal line 501, the command execution control circuit 62 causes the signal line 501,
This command is received through the input / output device connection circuit 61 and the signal line 601, and storage drive address information, track address information, sector address information transferred from the input / output device 50, and information designating the number of sectors to be written are transmitted. receive. The instruction execution control circuit 62 instructs the storage drive connection circuit 65 through the signal line 602 to select the storage drive designated by the storage drive address information.
Here, it is assumed that the storage drive 66a is selected for the following description. Next, the instruction execution control circuit 62 uses the signal line 602,
The track address information and the sector address information are sent to the storage drive 66a through the storage tribe connection circuit 65 and the signal line 606 to instruct to select the track and the sector. When the selection of the track and the sector is completed, the storage drive 66a detects the signal line 606, the storage drive connection circuit 65, and the signal line 60.
This is notified to the instruction execution control circuit 62 through 2. The instruction execution control circuit 62 includes a signal line 601, an input / output device connection circuit 61,
Through the signal line 501, the input / output device 50 is notified that the execution of the positioning command is completed.

 The I / O device 50 subsequently issues a write command.

The instruction execution control circuit 62 is a signal line 501, an input / output device connection circuit
61, When a write command is received through the signal line 601, the signal line
The storage drive connection circuit 65 and the signal line 606 are used to instruct the storage drive 66a to start writing from the sector on the previously selected track. Information to be written is input / output device 50 to signal line 501, input / output device connection circuit 61, signal line 60.
1, transferred to the storage drive 66a through the instruction execution control circuit 62, the signal line 602, the storage drive connection circuit 65, and the signal line 606. When the instruction execution control circuit 62 finishes transferring to the storage drive 66a the number of pieces of information corresponding to the number of sectors to be written specified by the previously executed positioning instruction, the signal line 60
1, I / O device connection circuit 61, I / O device through signal line 501
Notify 50 that the execution of the write instruction is completed.

The input / output device 50 subsequently issues a verify command. The instruction execution control circuit 62 includes a signal line 501, an input / output device connection circuit 61,
When a verify command is received through the signal line 601, the track address information and sector address information transferred by the previously issued positioning command and stored in the command execution control circuit 62 are transferred to the signal line 602, the storage drive connection circuit 65,
The data is again transferred to the storage drive 66a through the signal line 606, and an instruction to select a track and a sector is given. When the selection of tracks and sectors is completed, the storage drive 66a operates on the signal line 6
This is notified to the instruction execution control circuit 62 through 06, the storage drive connection circuit 65, and the signal line 602.

Then, the instruction execution control circuit 62 instructs the storage drive 66a through the signal line 602, the storage drive connection circuit 65, and the signal line 606 to start reading from the sector on the previously selected track. The read information is sent to the error check circuit 63 through the signal line 606, the storage drive connection circuit 65, and the signal line 603, and the error check circuit 63 checks whether there is an error, and the result is sent through the signal line 604 to the instruction execution control circuit. 62 will be notified. If there is no error, the sectors are sequentially read and transferred by the previously executed positioning command. Command execution control circuit
Reading and error checking of the number of sectors specified by the number of sectors to be written stored in 62 are performed. When the error check circuit 63 detects an error, the fact is notified to the instruction execution control circuit 62 through the signal line 604. The instruction execution control circuit 62 reads the address of the sector including the error from the storage drive 66a through the signal line 606, the storage drive connection circuit 65, and the signal line 602, and reads the address of the spare alternative sector corresponding to the data sector including the error. The track address information and the sector address information are calculated, and transferred to the storage drive 66a through the signal line 602, the storage drive connection circuit 65, and the signal line 606 to instruct to select the track and the sector. When the track and sector selection is completed, the instruction execution control circuit 62 causes the signal line 602,
Through the memory drive connection circuit 65 and the signal line 606, the memory drive 66a is instructed to start reading from the sector on the previously selected track. The information read is the signal line 606,
It is sent to the write state inspection circuit 64 through the memory drive connection circuit 65 and the signal line 603 to check whether or not the alternative sector has been written, and the result is notified to the instruction execution control circuit 62 through the signal line 605. If the read alternative sector has been written, the alternative sectors are sequentially read and it is checked whether or not it has been written. Write status inspection circuit
When the end-write alternative sector is detected, 64 notifies the instruction execution control circuit 62 of this through the signal line 605. The instruction execution control circuit 62 reads the address of the last written alternative sector from the storage drive 66a through the signal line 606, the storage drive connection circuit 65, and the signal line 602, and adds an error to the status information indicating that an error was detected during verification. The address of the included data sector and the address of the last-used alternative sector are added and transferred to the input / output device 50 through the signal line 601, the input / output device connection circuit 61, and the signal line 501.

The input / output device 50 writes a mark indicating that the sector is unreadable to the data sector specified by the address of the data sector containing the error, and further, the alternative sector specified by the address of the unused alternative sector. By writing the information to be written to the unreadable data sector, the information of the defective data sector can be transferred to the alternative sector.

The operation when the storage drive other than the storage drive 66a is selected is the same as the above-mentioned operation, and thus the description thereof is omitted.

〔The invention's effect〕

As described above, the storage device of the present invention has the effect of facilitating software error processing by displaying the address of an unused alternative track or alternative sector in the status information indicating the execution result of the verify command.

[Brief description of drawings]

FIG. 1 is a block diagram showing an information recording format in an embodiment of the storage device of the present invention, and FIG. 2 is a circuit block diagram showing an embodiment of the storage device of the present invention. In the figure, 11,12,13, to 1n ... Data sector, 21,22,
~ 2m …… Alternative sector, 50 …… I / O device, 60 …… Memory device, 61 …… I / O device connection circuit, 62 …… Instruction execution control circuit, 63 …… Error checking circuit, 64 …… Writing status check circuit,
65 ... Memory drive connection circuit, 66a-66i ... Memory drive, 501,601, -607 ... Signal line.

Claims (1)

[Claims] 1. An instruction execution control means for decoding and controlling execution of an instruction, an error checking means for checking whether information read from a recording medium contains an error, and writing information on the recording medium. Write state inspection means for inspecting whether or not it has been completed, and the instruction execution control means is a verify instruction for inspecting whether or not the decoded instruction is correctly recorded on the recording medium. When there is an error, the information recorded by the error checking means is inspected for an error. When an error is detected, the writing state checking means preliminarily substitutes an unused information recording area which has not been written. Memory device, the address of an alternative information recording area is added to the status information indicating the execution result of the verify command, and the result is transferred to a higher-level device. Place.