Method for recovering data from a redundant storage object

Details Method for recovering data from a redundant storage object Method for recovering data from a redundant storage object

2007-06-26

2007-06-26

Chu, Gabriel (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S020000

Reexamination Certificate

active

10601265

ABSTRACT:
A method for recovering data from a redundant storage object comprises a command, executable upon a redundant storage object, which provides a mechanism for discovering the existence of copies of the data image and the number of copies of the data image available. The present invention further provides the capability of retrieving a copy of the data image(s) from underlying virtualization layers. By querying specific layers of the IO path to determine if a specific layer has copies of the data image, the number of copies may be determined and specified copies of the data image retrieved. This allows higher layers within a system to perform recovery if incorrect data is detected.

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