Disk array subsystem and data generation method therefor

Details Disk array subsystem and data generation method therefor Disk array subsystem and data generation method therefor

1995-09-07

1998-06-09

Swann, Tod R.

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

371 511, G06F 1300, G06F 1110

Patent

active

057651833

ABSTRACT:
A disk drive has two channels of upper interfaces, and one channel is connected to a disk array controller, and the other channel is connected between a plurality of disk drives. A data disk drive reads the old data on the recording medium, calculates the exclusive OR of the old data and the corresponding data from the disk array controller, and transfers it to a parity disk as pseudo-parity data from the other channel. The parity disk drive reads the old parity data on the recording medium, calculates the exclusive OR of the old parity data and the pseudo-parity data, and writes it as new parity data.

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Alford, Roger C. "Disk Arrays Explained", Byte, pp. 259-266, Oct. 1992.

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