Information writing and reading apparatus

Details Information writing and reading apparatus Information writing and reading apparatus

1992-06-29

1995-04-04

Canney, Vincent P.

Excavating

371 102, 369 4427, G11B 700

Patent

active

054043573

ABSTRACT:
An information writing and reading apparatus for writing and reading data on a recording disk has a plurality of rewritable sectors for storing normal data and a plurality of DMA sectors for storing defect management data repeatedly in a plurality of DMAs (Defect Management Areas). The information writing and reading apparatus includes DMA register for storing condition data representing the condition of the DMA sectors, erasing device for erasing data in the recording disk by a sector, and a controller for controlling such that after one DMA sector is erased by the erasing device, a condition of the DMA sector is examined whether it is a defectless sector or a defect sector, and a flag representing the examined result is stored in the DMA register.

REFERENCES:
patent: 5075804 (1991-12-01), Deyring
patent: 5233584 (1993-08-01), Kulakowski et al.
patent: 5235585 (1993-08-01), Bish et al.

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