Simplified parity disk generation in a redundant array of inexpensive disks
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United States of America Patent
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Issued Date -
Dec 20, 2007
app pub date -
Apr 28, 2006
filing date -
Apr 28, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method for efficiently writing data to a redundant array of inexpensive disks (RAID) includes: writing an entire slice to the RAID at one time, wherein a slice is a portion of the data to be written to each disk in the RAID; and maintaining information in the RAID for slices that have been written to disk. A system for efficiently writing data to a RAID includes a buffer, a parity generating device, transfer means, and a metadata portion in the RAID. The buffer receives data from a host and accumulates data until a complete slice is accumulated. The parity generating device reads data from the buffer and generates parity based on the read data. The transfer means transfers data from the buffer and the generated parity to the disks of the RAID. The metadata portion is configured to store information for slices that have been written to disk.
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