JPH01245463A - Disk memory device - Google Patents

Abstract

PURPOSE:To shorten a lead lighting time by completing a seeking operation once even in either case of a normal track and defective track. CONSTITUTION:The seeking address fed from a controller through a controller interface pass 4 is compared with the defective address stored in the table 6 for referring the defective address by a defective address deciding part 7. In case of a defective track the deciding part 7 reads the address of an alternate track from the table 6, it is fed to a disk driving part 2 by an alternation processing part 8, the seeking operation onto the alternate track is performed and the lead lighting of the data is performed for this track. The seeking operation will thus do once even if the seeking address fed from a controller is on a normal track or defective track and the time spent in lead lighting is shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk storage device having a disk drive unit that drives a disk medium having defective tracks.

[Prior Art] FIG. 4 is a schematic configuration diagram showing a conventional disk storage device.
In the figure, (1) is a disk storage device such as a magnetic disk device, (2) is a disk drive unit that drives a disk medium (not shown) having a replacement track for a defective track, and (3) is a controller (not shown). A controller interface mechanism (5) controls the disk drive unit (2) in response to signals from the controller interface bus (4) from the controller interface bus (4), and a defective track (5) determines whether the seek address from the controller is a normal track or a defective track. This is the judgment section.

Next, the operation will be explained. The seek address sent from the controller to the controller interface mechanism (3) through the controller interface bus (4) is sent as is to the disk drive section (2). A seek operation is then performed to the sent address, and if the track at that address is a normal track, a read/write operation is thereafter performed on that track.

If the track on which the seek operation was performed is a defective track, the identification flag written on the track and its replacement track are sent to the defective track determination unit (5).
The data is read out by the disc drive unit (2), and a seek operation to the alternative track is performed. Thereafter, read/write operations are performed on that alternative track.

[Problems to be Solved by the Invention] Conventional disk storage devices are configured as described above, so if the seek address sent from the controller is a defective track, the seek operation for the disk drive unit is performed twice. However, there is a problem in that the time required to read and write comparison data becomes long when the track is not defective.

This invention was made to solve the above-mentioned problems, and it is a disk memory in which even if the seek address is a defective track, the time required for read/write is the same as when the seek address is a normal track. The purpose is to obtain equipment.

[Means for Solving the Problems] A disk storage device according to the present invention includes a defective track reference table storing defective track address information and alternative track address information in a disk medium in a controller interface mechanism, and A defective track determination unit that determines whether the received seek address is a normal track or a defective track based on the above table; and when the determination unit determines that the track is normal, the determination unit causes the disk drive unit to perform a seek operation to the normal track. The apparatus is further provided with an alternative processing section which causes the disk drive section to perform a seek operation to an alternative track when the track is determined to be defective.

Further, a disk storage device according to another invention of the present invention includes:
In addition to the above, a solid-state memory for alternative storage is provided to store data in place of the defective track, and an alternative processing section is provided to perform the seek operation of the disk drive section to the normal track when the judgment section judges that the track is normal. When the track is determined to be defective, an access operation to the alternative solid-state memory is performed.

[Function] In the disk storage device of the present invention, whether a seek address sent from the controller is a normal track or a defective track is determined by the defective track determination section using an alternative track reference table. When a track is being tracked, a seek operation to a normal track is performed, and when a defective track is being tracked, a seek operation to an alternative track is performed by the alternative processing section, and one seek operation is required for either a normal track or a defective track.

Further, a disk storage device according to another invention of the present invention includes:
If the defective track determining unit determines that the seek address is a normal track, the disk drive unit performs a seek operation to the normal track, and if the seek address is determined to be a defective trunk, the alternative processing unit accesses the solid-state memory for alternative storage. The operation is performed, and subsequent reads and writes to the defective track are performed to the solid-state memory for alternative storage.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1st
The figure is a schematic configuration diagram showing an embodiment of the present invention. In the figure, (1) is a disk storage device, (2) is a disk drive unit, (3) is a controller interface mechanism, and (4) is a disk drive unit.
is a controller interface bus, which is the same as the conventional device. (6) is a defective track reference table that stores defective track address information and alternative track address information in the disk medium, and (7) is a table (7) that stores seek addresses sent from the controller.
(6) is a defective track determining section that determines whether the track is a normal track or a defective track; and (8) is a defective track determining section that determines whether the track is a normal track or a defective track. If the determination in (7) is that the track is defective, this is an alternative processing section that causes the disk drive section (2) to perform a seek operation to an alternative track.

Next, the operation of this embodiment will be explained. The seek address sent from the controller through the controller interface bus (4) is sent to the defective address determination unit (7).
) is compared with the defective address information stored in the defective address reference table (6). If the seek address is a normal track, the seek address is sent as is to the disk drive unit (2) by the alternative processing unit (8), a seek operation to the normal track is performed, and data read/write is performed to this track. It will be done. If the seek address is a defective track, the determination unit (7) determines TE.

- Read the address of the alternate track from pull (6).

This is sent by the alternative processing section (8) to the disk drive section (2), a seek operation to the alternative track is performed, and data is read/written to this track.

In this way, regardless of whether the seek address sent from the controller is a normal track or a defective track, the time required for read/write can be shortened by requiring - times of seek operations.

In the above embodiment, the table (6), the determination unit (7), and the alternative processing unit (8) are shown as separate parts, but the determination unit (7) and the alternative processing unit (8) can be integrated into one unit.
It may be used as an alternative processing section, or as shown in FIG. 2, the table (6) may also be configured as a - section of the determination/alternative processing section (9).

In the above embodiment, when data is read or written across two or more tracks that include a defective track, a seek operation is performed to an alternative track each time the head passes over the defective track, and the track does not include only normal tracks. However, when data is read or written over two or more tracks, the specific write-to-write time increases. Third
The figure is a schematic configuration diagram showing an embodiment that improves this point. In the figure, (1) to (4), (6), and (7) are the first
It is similar to the embodiment shown in the figure, and (10) is a random access memory (hereinafter referred to as RAM) which is a solid-state memory for alternative storage that stores data in place of defective tracks.

(11) is a battery for supplying power to the RAM (10); (12) is a battery that controls the seek operation of the disk drive unit (2) to a normal track when the determination unit (7) determines that the track is normal; ) is determined to be a defective track, RA
This is an alternative processing unit that performs an access operation to M (10).

In this embodiment, when the seek address sent from the controller through the controller interface bus (4) is determined to be a normal track by the 1 determination unit (7), the disk drive unit (2) performs a seek operation to the normal track. is performed by the alternative processing section (12). When the determination unit (7) determines that the seek address is a defective track, the alternative processing unit (12) reads RAM (10).
The address of the alternative track for the defective track read from the table (6) is accessed, and thereafter read/write is performed to the accessed address in the RAM (10).

In this way, in this embodiment, the RA is applied to a defective track without performing a seek operation of the disk drive section (2).
M(10) is accessed and a quick drive is performed on it, so if data is read or written over two or more tracks including a defective track, an alternative track is created each time the head passes over the defective track. There is no need to perform a seek operation to the track, and read/write can be performed in the same time as when only normal tracks are used.

In the embodiment shown in Fig. 3, a combination of RAM and a battery as its power source was used as the alternative solid-state memory, but it is also possible to use EEPROM (electrically erasable and programmable ROM) with similar functions. May be used.

[Effects of the Invention] As described above, according to the present invention, the controller interface mechanism includes a defective track reference table that stores defective track address information and alternative track address information in the disk medium, and a defective track reference table that stores defective track address information and alternative track address information in the disk medium. A defective track determination unit determines whether the coming seek address is a normal track or a defective track based on the above table. In the case of a defective track, an alternative processing section is provided that causes the disk moving section to perform a seek operation to an alternative track when a defective track occurs.

Even when a defective track is detected, the read/write time is the same as that for a normal track, and the read/write time is significantly shortened.6Furthermore, according to another aspect of the present invention, when An alternative storage solid-state memory for storing data in place of the defective track is provided, and an alternative processing section is provided, and when the defective track determination section determines that the track is normal, the disk drive section performs a seek operation to the normal track; This is because the above-mentioned solid-state memory for alternative storage is sometimes accessed.

There is no need to perform a seek operation to an alternative track when a defective track occurs, and even when data is read or written across two or more tracks including a defective track, the read/write time is about the same as when only normal tracks are included. This has the effect of further shortening the read/write time.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing one embodiment of the present invention, FIGS. 2 and 3 are schematic diagrams showing other embodiments of the invention, and FIG. 4 is a schematic diagram showing a conventional disk storage device. FIG. In the figure, (1) is a disk storage device, (2) is a disk drive unit, (3) is a controller interface mechanism, (4) is a controller interface bus, (6) is a defective track reference table, and (7) is a defective track reference table. A track determination unit, (8) and (12) are alternative processing units, (10) is an alternative storage solid-state memory (RAM), and (11) is a battery. The same reference numerals in the figures indicate the same or corresponding parts.

Claims (2)

[Claims] (1) In a disk storage device comprising a disk drive unit that drives a disk medium having a substitute track for a defective track, and a controller interface mechanism that controls the disk drive unit in response to a signal from a controller, the controller interface mechanism , a defective track reference table storing defective track address information and alternative track address information in the disk medium, and a seek address sent from the controller to determine whether the track is a normal track or a defective track. a defective track determination section; when the determination section determines that the track is a normal track, the disk drive section performs a seek operation to the normal track; when the determination section determines that the track is defective, the disk drive section performs a seek operation to an alternative track; What is claimed is: 1. A disk storage device characterized by comprising an alternative processing section that allows (2) In a disk storage device that includes a disk drive unit that drives a disk medium that has a replacement track for the defective track, and a controller interface mechanism that controls the disk drive unit in response to a signal from a controller, the replacement track is replaced with the defective track. A solid-state memory for alternative storage is provided for storing data, and the controller interface mechanism includes a defective track reference table storing defective track address information and its substitute track address information in the disk medium, and a defective track reference table that is sent from the controller. a defective track determination unit that determines whether the received seek address is a normal track or a defective track based on the table; and when the determination unit determines that the track is normal, the disk drive unit performs a seek operation to the normal track;
A disk storage device comprising: an alternative processing section that performs an access operation to the alternative solid-state memory for storage when the judgment section judges that the track is defective.