Magnetic disk having reserve servo sectors and plural reserve tr

Details Magnetic disk having reserve servo sectors and plural reserve tr Magnetic disk having reserve servo sectors and plural reserve tr

1992-01-14

1994-05-31

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record medium

Disk

G11B 582

Patent

active

053174682

ABSTRACT:
Plural reserve servo sectors are provided to the outside of the outside and inside circumferences of the data recording track area of a sector servo type magnetic disk. Plural reserve tracks are likewise provided in this area. Using these reserve servo sectors and tracks, the position of the magnetic head is recognized even if the head skips outside the data recording track area due to magnetic head overshoot during track access, and seek errors are quickly determined and the disk re-accessed if the magnetic head is positioned in the reserve track due to a seek error or other cause. Sectors to which data relating to the protection of the magnetic disk itself or to the data files written to the data recording track area of the disk are also provided in the reserve tracks, and these sectors are referenced for data protection.

REFERENCES:
patent: 3731177 (1973-05-01), Commander et al.
patent: 4032984 (1977-06-01), Kaser et al.
patent: 4400747 (1983-08-01), Siverling
patent: 4783705 (1988-11-01), Moon
patent: 4949202 (1990-08-01), Kim
patent: 5187619 (1993-02-01), Sidman

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