Dual redundant data storage format and method

Details Dual redundant data storage format and method Dual redundant data storage format and method

2008-07-29

2008-07-29

McCarthy, Christopher S (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C711S114000

Reexamination Certificate

active

07406621

ABSTRACT:
Disclosed is a data storage architecture that provides data regeneration following the failure of two storage domains and that provides conversion for RAID-6 to RAID-5 or RAID-0 without moving or copying any data. A storage grid comprising at least eight domains and twelve rows contains user data in a first contiguous portion and may contain row parity data in a second continuous portion and may contain vertical parity data in a third contiguous portion. In one embodiment data is arranged in row and vertical sets each comprising four data blocks such that each user data block is a member of one row set and is a member of one vertical set. In another embodiment sets comprise two blocks each.

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