Cylinder address storage in multiple servo sectors of a track

Details Cylinder address storage in multiple servo sectors of a track Cylinder address storage in multiple servo sectors of a track

1994-12-22

1996-12-31

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 49, 360 7708, 360 76, G11B 5596

Patent

active

055899986

ABSTRACT:
A no-ID zone-bit-recording sectored servo data recording disk drive system is described wherein track seek time is substantially reduced by storing only partial cylinder address on each servo sector of each track. According to the system and method described herein, a cylinder address is divided into high order bits, middle order bits, and low order bits. The low order bits is stored on each servo sector of each track. The high order bits is stored only on even number servo sectors and middle order bits is stored only on odd number servo sectors. During the seek operation, as the head passes over the tracks toward the desired track, the partial cylinder address stored on odd and even numbered servo sectors on each track is retrieved and stitched together to form a complete cylinder address. The completed cylinder address is then compared with the desired cylinder address to determine whether desired cylinder is reached or not. By storing only partial cylinder information on each servo sector rather than the full cylinder address, servo seek time is substantially reduced.

REFERENCES:
patent: 5210660 (1993-05-01), Hetzler
patent: 5276564 (1994-01-01), Hessing et al.
patent: 5339207 (1994-08-01), Moon et al.
patent: 5384671 (1995-01-01), Fisher
patent: 5459623 (1995-10-01), Blagaila et al.

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