Fault tolerance system and method for one or two failed...

Details Fault tolerance system and method for one or two failed... Fault tolerance system and method for one or two failed...

2008-04-08

2008-04-08

Chase, Shelly A (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Error/fault detection technique

Reexamination Certificate

active

07356757

ABSTRACT:
A fault tolerance system for one or two failed disks in a disk array includes a CPU, a disk array, and a bus. The disk array includes disks, each of which is logically divided into multiple blocks, wherein the blocks include data blocks, P parity blocks and Q parity blocks. The CPU, which is connected to the disk array through the bus, includes: an exclusive-or (XOR) unit for performing XOR operations on blocks of the disk array when generating P/Q parities or reconstructing failed data; a modulus operation unit for performing modulus operations; a shift operation unit for performing shift operations on the blocks of the disk array; and an address conversion unit for converting a logic address into a physical address. Related methods are also provided.

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