Disk replacement via hot swapping with variable parity
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United States of America Patent
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N/A
Issued Date -
Nov 21, 2002
app pub date -
Jan 29, 2002
filing date -
Jan 29, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A system and method for enhanced disk replacement via hot swapping with variable parity is described. The system and method operate on a computer storage system that includes a plurality of disk drives for storing distributed parity groups. Each distributed parity group includes storage blocks. The storage blocks include one or more data blocks and a parity block that is associated with the one or more data blocks. Each of the storage blocks is stored on a separate disk drive such that no two storage blocks from a given parity set reside on the same disk drive. The computer storage system further includes file system metadata to describe a location of each of the storage blocks. The computer storage system further includes a resource-allocation module to recognize a new disk drive that is hot-swapped into the plurality of disk drives during file system operation and to use the new disk drive to store one or more storage blocks.
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