Disk control apparatus for recording and reproducing compression

Details Disk control apparatus for recording and reproducing compression Disk control apparatus for recording and reproducing compression

1996-01-29

1997-07-29

Kim, Matthew M.

395463, 395888, 395441, 395442, G06F 1208

Patent

active

056528574

ABSTRACT:
The logic blocks which were swept out from a non-compression cache memory are compressed by a compressing circuit and are combined to a compression group (logic sector size) of a fixed length in which a plurality of compression data are collected by a compression group forming unit. The compression group is stored into a logic sector of a disk drive through a compression cache memory. A correspondence relation with a plurality of logic blocks included in the logic sectors of a disk is registered in a mapping table. In response to a request by the logic block number from the host computer, the logic sector (compression group) of the disk drive is read and written with reference to the mapping table.

REFERENCES:
patent: 4467421 (1984-08-01), White
patent: 5393445 (1995-02-01), Takamoto et al.
patent: 5403639 (1995-04-01), Belson et al.

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