发明名称 |
SYSTEM AND METHOD FOR IMPROVING THE PERFORMANCE OF OPERATIONS REQUIRING PARITY READS IN A STORAGE ARRAY SYSTEM |
摘要 |
A system for improving a performance of a write process in an exemplary RAID system reduces a number of IOs required for a short write in a RAID algorithm by using a replicated-parity drive. Parity is stored on the parity portion of the disk drives. A replicated-parity drive comprises all the parity information. Parity information for each parity drive is co-located or mirrored on the replicated-parity portion of the disk drives for fast access during a read portion of the read-modify-write process. Consequently, the system accesses parity data with one seek, as opposed to P seeks in a conventional disk array system utilizing P parity drives.
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申请公布号 |
US2008155194(A1) |
申请公布日期 |
2008.06.26 |
申请号 |
US20080037480 |
申请日期 |
2008.02.26 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORP. |
发明人 |
HARTLINE JEFFREY R.;HAFNER JAMES LEE;KANUNGO TAPAS |
分类号 |
G06F12/00 |
主分类号 |
G06F12/00 |
代理机构 |
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