Optimization of storage device accesses in RAID systems

Details Optimization of storage device accesses in RAID systems Optimization of storage device accesses in RAID systems

2011-03-29

2011-03-29

Rizk, Sam (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C711S111000, C711S112000, C711S114000

Reexamination Certificate

active

07917831

ABSTRACT:
A result value, such as a parity value, for a set of corresponding data elements from a plurality of storage devices is determined using a commutative operation. When accessing the set of corresponding data elements from a plurality of storage devices, a dual access can be performed for the storage device accessed last for the set of corresponding data elements so as to also obtain a data element from the last-accessed storage device for the next parity calculation. As a result, the number of storage device accesses can be reduced compared to conventional systems whereby a single access is performed for each storage device to obtain a single data element from the storage device.

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