Disk array device, parity data generating circuit for RAID...

Details Disk array device, parity data generating circuit for RAID... Disk array device, parity data generating circuit for RAID...

2004-11-17

2008-10-14

Abraham, Esaw (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Error/fault detection technique

C714S781000, C714S819000, C714S763000

Reexamination Certificate

active

07437658

ABSTRACT:
In this parity data generating circuit, a Galois field multiplying calculation is realized by performing data conversion by index table information generated from a Galois field multiplying table so that data for RAID6 are generated. A table check circuit inspects nonconformity of the index table information in advance by using results in which the Galois field multiplying table is indexed from different directions constructed by the longitudinal direction and the transversal direction. Data and parity for making the multiplying calculation are decomposed into plural data and parities by using this table check circuit, and index table information different from each other are allocated to these data and parities. Thus, a longitudinal index table making circuit and a transversal index table making circuit themselves are checked.

REFERENCES:
patent: 5499253 (1996-03-01), Lary
patent: 6148430 (2000-11-01), Weng
patent: 6523054 (2003-02-01), Kamijo
patent: 7003715 (2006-02-01), Thurston
patent: 7133889 (2006-11-01), Parthasarathy et al.
patent: 2004/0078643 (2004-04-01), Ghosh et al.

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