Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Reexamination Certificate
2007-01-25
2009-10-06
Bonzo, Bryce P (Department: 2113)
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
Reexamination Certificate
active
07600151
ABSTRACT:
A RAID capacity expansion interruption recovery handling method and system is proposed, which is designed for use with a RAID (Redundant Array of Independent Disks) unit for providing a capacity-expansion interruption recovery function that allows the RAID unit to recover after an event of an unexpected interruption to a capacity-expansion procedure that builds data from an original disk set to a newly-added disk. The proposed method and system is characterized by the capability of continuously recording the addresses of blocks that have been rebuilt in the original disk set and the newly-added disk to a permanent storage medium, such that in the event of any unexpected interruption, the address of the last block that has been rebuilt can be stored as a checkpoint. After the RAID unit is reset, the checkpoint can then be used as a recovery point for the uncompleted capacity expansion procedure without having to restart all over again from the beginning point. This feature allows the recovery of capacity expansion after unexpected interruption to be carried out more efficiently with enhanced system performance.
REFERENCES:
patent: 6058489 (2000-05-01), Schultz et al.
patent: 2005/0166085 (2005-07-01), Thompson et al.
patent: 2007/0174577 (2007-07-01), Moir et al.
patent: 2009/0094427 (2009-04-01), Sano
Bonzo Bryce P
Corless Peter F.
Edwards Angell Palmer & & Dodge LLP
Inventec C'orporation
Jensen Steven M.
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