Data redundancy and recovery protection

Details Data redundancy and recovery protection Data redundancy and recovery protection

G - Physics

11

B

354/224

G11B 20/18 (2006.01) G06F 11/14 (2006.01) G11B 19/02 (2006.01) G11C 29/00 (2006.01) G06F 11/10 (2006.01)

Patent

CA 2029151

Abstract A method for detecting the presence of a replacement disk in a fault tolerant, intelligent mass storage disk array subsystem having a microprocessor based controller in a personal computer system and rebuilding the replacement disk independent of the computer system processor. The method calls for the microprocessor controller to run a disk array check at system powerup or at specified intervals at which will detect the existence of a replacement drive. The microprocessor then builds a series of disk drive commands which attempt to read every sector on the replacement disk. The read commands will return a null data read, indicating that the sector must be restored. The microprocessor controller converts the replacement read commands for all sectors on the replacement disk to write-restore commands. The microprocessor executes the write commands and restores the data to the replacement drive.

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