Computer storage drive array with command initiation at respecti

Details Computer storage drive array with command initiation at respecti Computer storage drive array with command initiation at respecti

1995-09-14

1998-06-30

Beausoliel, Jr., Robert W.

G06F 1100

Patent

active

057746419

ABSTRACT:
In a data processing system, a redundant array of storage devices is provided for storing data from a host data processing system. When a selected, storage device receives a write command, the selected storage device reads old data from the logical address specified in the write command, and temporarily stores such old data in a buffer. Next, the selected storage device writes new data from the host data processing system to a location specified in the write command. Thereafter, an XOR operation is performed in the selected storage device between the new data and the old data to produce intermediate data. The intermediate data is then transferred to a second storage device within the array. Within the second storage device, old parity data is read from the media in the second storage device and placed in a buffer. Next, an XOR operation is performed in the second storage device between the intermediate data and the old parity data to produce new parity data. Finally, such new parity data is written in the second storage device. Commands for reading data, writing data, performing XOR operations, and transferring data are all generated and executed within the storage devices which comprise the redundant array of storage devices.

REFERENCES:
patent: 5440727 (1995-08-01), Bhide et al.
patent: 5504858 (1996-04-01), Ellis et al.
patent: 5519844 (1996-05-01), Stallmo
patent: 5519849 (1996-05-01), Malan et al.
patent: 5533190 (1996-07-01), Binford et al.
patent: 5617425 (1997-04-01), Anderson
patent: 5634033 (1997-05-01), Stewart et al.
IEE Transactions On Computers, vol. 42, No. 6, Jun. 1993.
The Performance Of Parity Placements in Disk Arrays.
Patterson et al., "A Case For Redundant Arrays Of Inexpensive Disks (RAID)", pp. 1-23, ACM, 1988.
HSIAO et al., "A Performance Study of Three High Availability Data Replication Strategies", IEEE, 1991, pp. 18-28.

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