Magnetic disk write precompensation method and apparatus which t

Details Magnetic disk write precompensation method and apparatus which t Magnetic disk write precompensation method and apparatus which t

1986-10-17

1991-06-18

Severin, David J.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Pulse crowding correction

360 27, G11B 509

Patent

active

050253271

ABSTRACT:
Write precompensation data is recorded on a disk of a magnetic disk drive indicating the write compensation to be provided for each of a plurality of head/media combination which may have relatively wide variations in performance characteristics. Apparatus is provided for transferring and storing this write precompensation data in the disk controller at start-up and for accessing this stored data during each write operation to provide a "tailored" write precompensation for the particular head/media combination to be employed for the writing operation.

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IBM TDB, "Write Data Wrap Test", vol. 26, No. 10A, Mar. 1984 p. 4879.
Electronics International, "Winchester Electronics Functions Fit on Four High-Speed Chips", vol. 55, No. 12, Jun. 1982, p. 117.

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