Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2006-03-23
2009-02-03
Chu, Gabriel L (Department: 2114)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
C714S764000, C717S168000
Reexamination Certificate
active
07487392
ABSTRACT:
Data in a nonvolatile memory included in a data storage device is rewritten with higher security. According to one embodiment of the present invention, if an error is included in data stored in a nonvolatile semiconductor memory, the HDD rewrites correct data to the nonvolatile semiconductor memory. In particular, during the execution sequence of a write command, the HDD executes rewrite processing of control data stored in the nonvolatile semiconductor memory. More specifically, data is rewritten during a specified period of time that falls within a period of time starting from a start notification of write-data transfer processing that is sent from the HDD to the host, until a command completion notification. Since there is a very small possibility that the power of the host may be interrupted during this specified period of time, it is possible to securely rewrite data.
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Kanamaru Atsushi
Kawa Tadahisa
Kowa Tsuguaki
Chu Gabriel L
Hitachi Global Storage Technologies - Netherlands B.V.
Nader Rambod
Townsend and Townsend / and Crew LLP
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