Method of detecting sector servo information in a disk system

Details Method of detecting sector servo information in a disk system Method of detecting sector servo information in a disk system

1994-01-25

1995-08-15

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 48, 360 49, 360135, 369 4426, G11B 5596, G11B 509

Patent

active

054424992

ABSTRACT:
A method and apparatus for detecting sector servo information in a disk system, uses sector servo information with at least one auxiliary confirming code pattern provided in addition to conventionally-used sector mark, track address and servo position information. Generation of a group of timing signals to detect a selected portion of the sector servo information, is adjusted by detecting the auxiliary confirming code pattern so that the timing signal is synchronized with the selected portion of the sector servo information In another embodiment, synchronization is performed using a predetermined number which is loaded into a counter circuit when the auxiliary confirming code pattern is detected.

REFERENCES:
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patent: 4862295 (1989-08-01), Tanaka et al.
patent: 4914530 (1990-04-01), Graham et al.
patent: 4964009 (1990-10-01), Moriya et al.
patent: 4984100 (1991-01-01), Takayama et al.
patent: 5036408 (1991-07-01), Leis et al.
patent: 5177651 (1993-01-01), Moraru et al.
IBM Technical Disclosure Bulletin, "Redundant Servo Identification Mark" vol. 30 No. 4, Oct. 1987, p. 239.
Patent Abstracts of Japan, vol. 6, No. 125 (P-127) (1003), Jul. 10, 1982 & JP-A-57-50313.

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