Disk array system using detachable memory medium

Details Disk array system using detachable memory medium Disk array system using detachable memory medium

1994-06-29

1996-10-08

Bowler, Alyssa H.

Boots, shoes, and leggings

39549701, 395833, 3642423, 364245, 3642463, 364254, 364DIG1, G06F 1200

Patent

active

055640338

ABSTRACT:
An external memory unit for a data processing system has a plurality of detachable memory media. Data is written in parallel to the memory media. Since the positions of the memory media can be switched, reference information is written in each of the media during an initialization process. Once initialized, the data can be read from and written to the memory media regardless of their current and former positions in the external memory unit. The reference information has sequence information indicating the position of a memory medium in a sequence when data is first written to a group of media as part of an operation that subdivides data and writes the subunits to the group. The name of the group is also included in the reference information. When a subsequent read or write operation is requested, the group information is used to determine if all of the media required for executing the request are present in the external memory unit, and if so, the operation is executed.

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Nikkei Computer 1992, Nikkei BP, pp. 87-99, Mar. 9, 1992.

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