Sector servo with sync marks

Details Sector servo with sync marks Sector servo with sync marks

1979-12-26

1981-10-27

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record medium

Disk

360 77, 360 78, G11B 582, G11B 2110

Patent

active

042977371

ABSTRACT:
A disk file employs a disk having sectors of track-following servo information interspersed around the disk between data portions. Included in each sector is a SYNC signal which is encoded to indicate the validity or invalidity of the servo information in that sector. The servo information in a sector is used only if the SYNC signal indicates that it is valid.

REFERENCES:
patent: 3725861 (1973-04-01), Hancock
patent: 3864741 (1975-02-01), Schwarz
patent: 3919697 (1975-11-01), Walker
patent: 4048660 (1977-09-01), Dennison et al.
patent: 4151571 (1979-04-01), Caroot et al.
patent: 4152734 (1979-05-01), Louth
patent: 4163265 (1979-07-01), Herk

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