Fault tolerant hard disk array controller

Details Fault tolerant hard disk array controller Fault tolerant hard disk array controller

1993-03-23

1994-11-22

Beausoliel, Jr., Robert W.

Excavating

371 101, G06F 1100

Patent

active

053676696

ABSTRACT:
The disk array control system is a fault tolerant controller for arrays of hard disk drives. With the controller as a front end, an array of hard disk drives would appear as a single drive to a host computer system connected to the controller. The controller translates input/output data transfer requests from the host system to input/output data transfer requests for the appropriate drives in the drive array. To minimize latency, translation techniques provide for a minimal number of accesses to the drives in the array. Queued input/output requests are supported, and, to maximize throughput, optimal scheduling techniques are used to optimize resource usage and minimize drive access overheads. Means are provided for detecting module failures, sustaining operation after failure, and replacing faulty modules without interrupting service.

REFERENCES:
patent: 5101492 (1992-03-01), Schultz et al.
patent: 5148432 (1992-09-01), Gordon et al.
patent: 5155835 (1992-10-01), Belsan
patent: 5163131 (1992-11-01), Row et al.
"A Case for Redundant Arrays of Inexpensive Disks (RAID)", by David A. Patterson et al., University of California Berkeley, Report No. UCB/CSD 87/391, Dec. 1987.

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