Disk array system having adjustable parity group sizes based on storage unit capacities
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United States of America Patent
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May 19, 1998
Grant Date -
N/A
app pub date -
Feb 29, 1996
filing date -
Mar 13, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The capacity efficiency of a disk array, when this disk array is constructed of drives of different capacities, is managed with a table so that areas of larger capacity disk drives of the disk array that would otherwise be left unused can be used for parity group storage. In this regard, at least one parity group can be constructed of a size based on the disk drive unit of the array having the least capacity. And, at least one other parity group can be formed of the remaining area in the disk drive units having a capacity that is greater than the disk drive unit having the least capacity that is of a size based on the remaining area of the disk drive unit having the next least capacity of the disk array.
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