Method of RAID 5 write hole prevention

Details Method of RAID 5 write hole prevention Method of RAID 5 write hole prevention

2006-06-27

2006-06-27

Moazzami, Nasser (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S162000, C714S006130, C714S006130

Reexamination Certificate

active

07069382

ABSTRACT:
A method of efficiently preventing data loss, specifically a RAID 5 write hole, in data storage system by storing valid parity information at the storage controller level during data write operations. The method employs the use of redundant data structures that hold metadata specific to outstanding writes and parity information. The method uses the redundant data structures to recreate the write commands and data when a system failure occurs before the writes have completed.

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