Background data reconstruction in a storage device array system

Details Background data reconstruction in a storage device array system Background data reconstruction in a storage device array system

1991-11-15

1998-09-01

Nguyen, Hoa T.

Excavating

39518205, 371 102, G06F 1100

Patent

active

058022643

ABSTRACT:
The present invention provides a storage device array system and method for operating a storage device array system that provides for data transfers to and/or from a storage device array during the reconstruction of data contained in a failed storage device onto a spare storage device. One embodiment of the invention provides for data transfers during the reconstruction of data on the spare storage device onto a storage device that is replacing the failed storage device. Another embodiment of the invention is directed to the situation in which data contained in a storage device to which data can be written and from which data can be read but these operations are inhibited is being reconstructed on a spare storage device using other of the storage devices in the array. In this situation, write operations to the storage device array are conducted in a manner that provides fault-tolerance, i.e., the ability to continue the reconstruction process, in the event one of the other storage devices being used to reconstruct the data on the spare storage device cannot provide the necessary data for reconstruction.

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R.R. Muntz and J.C.S. Lui, "Performance Analysis of Disk Arrays Under Failure," Proceedings of the 16th International Conference on Very Large Data Bases, Brisbane, Australia, Aug. 13-16, 1990, (1989) Palo Alto, California, pp. 162-173.

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