Anti-wear disk drive system

Details Anti-wear disk drive system Anti-wear disk drive system

1986-10-06

1991-01-22

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 69, G11B 2102

Patent

active

049875027

ABSTRACT:
A low-wear floppy disk drive system includes an anti-wear controller which randomly selects successive disk tracks to which it directs the disk read/write head whenever the disk drive is idle, so as to more evenly distribute head contact wear across lesser used portions of the disk, and thus increase disk life. The anti-wear controller does not intercede until after the disk drive has been idle for a minimum idle time (e.g. 15 seconds). After a maximum number (e.g., 6) of such idle periods--after the head has been moved a maximum number of times to randomly selected tracks--the anti-wear controller stops the disk rotation, thus stopping head contact wear on the disk altogether. The system excludes the most frequently used disk tracks--i.e., those tracks storing the disk file allocation tables--from the random selection. The system further excludes the innermost tracks on the disk--where the media is less compliant and disk wear more rapid--from the random selection.

REFERENCES:
patent: 4445188 (1984-04-01), Barrett
patent: 4458273 (1984-07-01), Johnson
patent: 4635145 (1987-01-01), Horie et al.
Patent Abstracts of Japan, vol. 4, No. 160, Abstract of Unexamined Application-#55-108963, Masaki Murakami, 8/21/80.
IBM Technical Disclosure Bulletin, vol. 21, No. 11, Apr. 1979, p. 4648, Multiple Band Loading Zone for Direct-Access Storage Devices, N. K. Ouchi.

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