Patent ID: 7971126

Claim:
An apparatus for hard disk drive redundancy, the apparatus comprising: a demarcation module comprising a computer readable program stored on a tangible storage medium, executed by a processor, and configured to demark a parity data block in a set of data blocks on a hard disk drive; an association module comprising a computer readable program stored on the tangible storage medium, executed by the processor, and configured to associate a physical block address (PBA) of each un-demarked data block in the set of data blocks with a logical block address (LBA); a write module comprising a computer readable program stored on the tangible storage medium, executed by the processor, and configured to write data to the un-demarked data blocks; a parity module comprising a computer readable program stored on the tangible storage medium, executed by the processor, and configured to calculate parity data for the data written to the un-demarked data blocks; and the write module further configured to write the parity data to the parity data block.