Disk drive memory

Details Disk drive memory Disk drive memory

1988-06-28

1990-04-03

Fleming, Michael R.

Excavating

371 401, 371 404, G06F 722

Patent

active

049146564

ABSTRACT:
The disk drive memory of the present invention uses a large plurality of small form factor disk drives to implement an inexpensive, high performance, high reliability disk drive memory that emulates the format and capability of large form factor disk drives. The plurality of disk drives are switchably interconnectable to form parity groups of N+1 parallel connected disk drives to store data thereon. The N+1 disk drives are used to store the N segments of each data word plus a parity segment. In addition, a pool of backup disk drives is maintained to automatically substitute a replacement disk drive for a disk drive in a parity group that fails during operation.

REFERENCES:
patent: 4467421 (1984-08-01), White
patent: 4667326 (1987-05-01), Young
patent: 4722085 (1988-01-01), Flora et al.
patent: 4761785 (1988-08-01), Clark
patent: 4817035 (1989-03-01), Timsit
patent: 4825403 (1989-04-01), Gershenson
Product Description--Micropolis 1804 SCSI Parallel Drive Array, Document No. 108120 Rev A, Micropolis Corporation.
David A. Patterson, Garth Gibson, and Randy H. Katz; A Case for Redundant Arrays of Inexpensive Disks (RAID); Report No. UCB/CSD8//391, Dec. 1987; pp. 1-24.

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