JPH04135227A - Lifetime calculating method for hard disk medium - Google Patents

Abstract

PURPOSE:To prevent the destruction of data written in a hard disk medium by recording comulatively the access frequency when the reading or writing operations are applied to the hard disk medium and therefore estimating the lifetime of the hard disk medium. CONSTITUTION:A processor 1 produces a data reading or writing command to a hard disk device 5, and a magnetic head of the device 5 has an access to a recording part 6. This physical access frequency is written in a data area 14 where the cumulative access frequency of the items 12 are recorded for each corresponding cylinder. Then the processor 1 monitors the data value of the cylinder having the highest access frequency based on a program stored in a main storage 2. When the monitored data value exceeds the access frequency defined previously as a lifetime, an exchanging command is produced for the hard disk media. Thus the data written in the hard disk medium are never destroyed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for calculating the lifespan of a hard disk medium, and particularly to prevention of failures due to the lifespan of a hard disk medium mounted in a disk device.

[Conventional technology]

Conventionally, disk devices have not had a function to detect the lifespan of a hard disk medium, and the operation mode has been such that the lifespan of a hard disk medium is known only after a failure occurs in the disk device.

[Problem to be solved by the invention]

The conventional disk device described above has the disadvantage that data is destroyed as the hard disk medium reaches the end of its life, making the disk device unusable.

[Means to solve the problem]

A method for calculating the lifespan of a hard disk medium according to the present invention includes providing a recording area corresponding to each cylinder in a hard disk medium for recording information and recording the number of accesses of a magnetic head for each cylinder; The number of accesses is accumulated in the recording area corresponding to the corresponding cylinder each time the cylinder is accessed, and when the number of accesses of the cylinder accessed the most times exceeds a predetermined number of times, the hard disk medium is replaced. It is characterized by

〔Example〕

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

FIG. 1 is a block diagram for implementing one embodiment of the present invention. In FIG. 1, a hard disk device 5 is connected to a signal bus 7 via a hard disk control device 3.
The processor 1 executes a program stored in the main storage device 2 to read data from the hard disk device 5 to the main storage device 2 or write data stored in the main storage device 2 to the hard disk device 5. or The hard disk device 5 also has a built-in recording unit 6 made of a hard disk medium, and the number of times a magnetic head (not shown) is accessed when reading or writing data output from the processor 1 to the hard disk device 5. is recorded in the memory 4 in the access count recording area provided in the hard disk control device 3.

FIG. 2 is a diagram showing the data structure in the access count recording area memory. In FIG. 2, the access count recording area 11 has the same number of items 12 for each cylinder as the number of cylinders in the hard disk drive 6 (615 in this embodiment), and the items 12 for each cylinder have a cylinder number 13. It consists of a data area 14 that records the cumulative number of accesses.

Here, the processor 1 issues a command to read or write data to the hard disk device 5, the magnetic head of the hard disk device 5 accesses the recording section 6, and the number of physical accesses is calculated as follows. Write to data area 14 that records the cumulative number of accesses in item 12 for each cylinder. The processor 1 monitors the data value of the most frequently accessed link/link mainly by a program stored in the device 2, and when the number of accesses exceeds a predetermined lifespan, it instructs to replace the hard disk medium. I do.

〔Effect of the invention〕

As described above, the present invention can predict the lifespan of a hard disk medium by cumulatively recording the number of accesses when reading or writing to the hard disk medium. This has the effect of preventing data written on the hard disk medium from being destroyed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram for realizing an embodiment of the present invention, and FIG.
The figure shows the data structure in the access count recording area memory. DESCRIPTION OF SYMBOLS 1... Processor, 2... Main storage device, 3... Hard disk control device, 4... Memory for access count recording area, 5... Hard disk device, 6... Recording unit, 7...・Signal bus, 11... Access count recording area, 12... Item for each cylinder, 13...
/linder number, 14... Data area that records the cumulative number of accesses.

Claims (1)

[Claims] A hard disk medium for recording information includes a recording area corresponding to each cylinder for recording the number of accesses of the magnetic head for each cylinder, and a recording area corresponding to the corresponding cylinder each time the hard disk medium is accessed. A method for calculating the lifespan of a hard disk medium, comprising accumulating the number of accesses to the recording area, and exchanging the hard disk medium when the number of accesses of the cylinder that has been accessed the most times exceeds a predetermined number of times.