Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2007-12-25
2007-12-25
Maskulinski, Michael C (Department: 2113)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
Reexamination Certificate
active
10911110
ABSTRACT:
A RAID controller performs a preemptive reconstruct of a redundant array of disks while it is still fault-tolerant by determining the errors by a first disk exceeded the error threshold, and reading data from a second disk, and writing the data to a spare disk. The second disk's data is a mirrored copy of the first disk's data. The controller also replaces the first disk with the spare disk, after completing the reading and writing. Additionally, while performing the reading and writing, the controller writes second data to the first disk in response to a user write request including the second data, thereby maintaining the fault-tolerance of the redundant array. In another embodiment, the controller creates the data of the first disk from second data read from two or more of the other disks in the array and writes the created data to the spare disk.
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Davis E. Alan
Dot Hill Systems Corporation
Huffman James W.
Maskulinski Michael C
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