Error detection in storage data

Details Error detection in storage data Error detection in storage data

2006-10-03

2006-10-03

Chase, Shelly (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

Reexamination Certificate

active

07117422

ABSTRACT:
Provided are a method, system, and an article of manufacture for detecting errors while accessing a storage device. A host system writes an identical initialization pattern into each block of a plurality of blocks while formatting the storage device. Each block of the plurality of blocks has a checksum field capable of containing a value. Any host system generates an error when data from a retrieved block from the plurality of blocks computes to a checksum that is different from the value contained within the checksum field for the retrieved block, and the retrieved block does not contain the initialization pattern.

REFERENCES:
patent: 5617432 (1997-04-01), Eggenberger et al.
patent: 5734815 (1998-03-01), Schatzberg
patent: 6629273 (2003-09-01), Patterson
patent: 2002/0184556 (2002-12-01), Hashemi
Gene Milligan, ed., “dpANS SCSI-3 Block Commands (SBC)”, Revision 8c, Nov. 13, 1997, pp. 30-38.
U.S. Appl. No. 09/917,315, filed on Jul. 27, 2001,“End-to-End Disk Data Checksumming”, invented by W.L. Duncan.

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