Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Reexamination Certificate
2006-07-11
2006-07-11
Padmanabhan, Mano (Department: 2189)
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
C360S055000
Reexamination Certificate
active
07076604
ABSTRACT:
A disk drive is disclosed comprising a disk having a plurality of tracks each comprising a plurality of data sectors for storing a plurality of data blocks. A microprocessor initializes a write verify counter in a disk command data structure and executes a write command. The microprocessor executes a write verify operation to verify the recoverability of the data written to a plurality of target data sectors. If the write verify operation fails for a target data sector, the microprocessor updates the write verify counter in the disk command data structure and re-executes the write command and the write verify operation. If the write verify operation fails a number of times such that the write verify counter exceeds a threshold, the microprocessor relocates a data block from the failing target data sector to a spare data sector.
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Evans, Esq. Jason T.
Ko Daniel
Sheerin, Esq. Howard H.
Western Digital Technologies Inc.
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