Patent ID: 6223323
Filing Date: 2001-04-24
Classification: G06F

Abstract:
A disk array storage system wherein data and related parity information are stored in corresponding storage blocks across a plurality of disk drives, said disk array storage system comprising:a first disk drive including a storage block for the non-volatile storage of a first component of parity information;a second disk drive including a storage block for the non-volatile storage of a second component of parity information;at least two disk drives including corresponding storage blocks for the storage of data;a first parity generating mechanism for calculating said first component of parity information stored on said first disk drive; anda second parity generating mechanism for calculating said second component of parity information stored on said second disk drive;wherein the exclusive-OR combination of said first component of parity information with said second component of parity information is equivalent to the exclusive-OR combination of the data stored within the corresponding storage blocks of said at least two disk drives.