Data integrity inspection support method for disk devices,...

Details Data integrity inspection support method for disk devices,... Data integrity inspection support method for disk devices,...

2005-11-14

2009-08-18

Chase, Shelly A (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

Reexamination Certificate

active

07577897

ABSTRACT:
Embodiments of the invention provide a disk device data integrity verification support method that allows data integrity verification of a disk array apparatus without consuming an interface band of disk devices. In one embodiment, arithmetic operations for data integrity verification are divided into those of a first phase that can be performed at least in the disk devices, and those of a second phase that can be performed in the disk array apparatus only. The arithmetic operations of the first phase are conducted using the following procedure: data is read out from a storage medium, saved arithmetic operation interim results are read out, the arithmetic operations using the two sets of data are conducted, and arithmetic operation results are saved as new interim results. During the arithmetic operations of the second phase, arithmetic operation results of the first phase are read out from each disk device and further arithmetic operations are conducted between those arithmetic operation results.

REFERENCES:
patent: 5745671 (1998-04-01), Hodges
patent: 5958067 (1999-09-01), Kaneda et al.
patent: 6526477 (2003-02-01), Yuan et al.
patent: 2002-149503 (2002-05-01), None

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