Array management system with volume transform filter
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United States of America Patent
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Mar 10, 1998
Grant Date -
N/A
app pub date -
Feb 14, 1996
filing date -
Feb 14, 1996
priority date (Note) -
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Abstract
In an data storage system, a volume transform filter is employed in conjunction with a RAID array manager to maintain logical volumes entirely on corresponding physical data storage volumes while maintaining parity information on a dedicated parity storage volume. This is achieved by modifying data access commands received from a host such that forwarding the modified commands to the RAID array manager in effect 'tricks' the RAID array manager into maintaining the logical volumes without striping. This system provides data allocation with standalone data and parity storage volumes, which are easily exportable for convenient use in data storage libraries.
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