Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2011-03-22
2011-03-22
Chu, Gabriel L. (Department: 2114)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
C714S024000
Reexamination Certificate
active
07913108
ABSTRACT:
Described are a system and method for improving the performance of a disk drive in a data storage system by enabling the disk drive to “ride through” events that can induce disk drive errors. In response to an error message received from a disk drive, a disk director temporarily places the disk drive into a wait state. While in the wait state, the disk drive is prevented from shutting down, despite the current error and any subsequent errors that the disk drive may experience. The disk drive may continue to service I/O requests while in the wait state, with the disk director monitoring the disk drive performance. After the disk drive exits the wait state, the disk director can determine from the monitored results whether to shut down the disk drive or to permit the disk drive to return to normal operation.
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Berenson Jeffrey R.
De Lucia Thomas M.
French F. William
Garvey Michael D.
Ives Stephen Richard
Chu Gabriel L.
EMC Corporation
Guerin & Rodriguez LLP
Ko Chae
Rodriguez Michael
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