Raid overlapping

Details Raid overlapping Raid overlapping

2007-08-14

2007-08-14

Elmore, Stephen C. (Department: 2185)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S001000, C711S147000, C711S148000, C711S154000, C711S162000, C709S201000, C709S203000, C709S220000

Reexamination Certificate

active

10872059

ABSTRACT:
A first array of disk drives overlaps with a second array of disk drives in a Redundant Array of Inexpensive Drives (RAID) system, in which the first and second arrays share at least one disk drive. A first stripe of data from a first client is stored in the first array, and a second stripe of data from a second client is stored in the second array. The shared disk drives are less than the number of drives needed to reconstruct a full stripe. Thus, in the event of a drive failure in the first array, the first client can reconstruct the first data stripe, but is never able to reconstruct the second stripe. Likewise, in the event of a drive failure in the second array, the second client can reconstruct the second data stripe, but is never able to reconstruct the first stripe.

REFERENCES:
patent: 6785836 (2004-08-01), Franklin et al.
patent: 2003/0023811 (2003-01-01), Kim et al.
patent: 2003/0046497 (2003-03-01), Dandrea
patent: 2003/0105920 (2003-06-01), Rodriguez et al.
patent: 2003/0149750 (2003-08-01), Franzenburg
patent: 2003/0225970 (2003-12-01), Hashemi
patent: 2004/0015655 (2004-01-01), Willis et al.
patent: 2004/0250161 (2004-12-01), Patterson

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