Management of defect areas in recording media

Details Management of defect areas in recording media Management of defect areas in recording media

1989-03-31

1991-12-24

Envall, Jr., Roy N.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Address coding

360 53, 360 54, 369 32, 369 48, 369 54, G11B 509

Patent

active

050758047

ABSTRACT:
An improved method of managing media defects in disk drives keeps an operating list of the tracks in the disk drive, and for each track enters on the list the number of good sectors (i.e., those free of defects) in that track. Thus the information on the operating list is sufficient for the disk drive microprocessor to avoid use of the defective sectors, each of which is labelled in its header as being defective. This method is compatible with SCSI and other common disk drive interfaces.

REFERENCES:
patent: 4498146 (1985-02-01), Martinez
patent: 4669004 (1987-05-01), Moon
patent: 4746998 (1988-05-01), Robinson
patent: 4774700 (1988-07-01), Satoh et al.
patent: 4821251 (1989-04-01), Hosoya
patent: 4839879 (1989-06-01), Sawada
patent: 4935825 (1990-06-01), Worrell

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