Semi-static distribution technique

Details Semi-static distribution technique Semi-static distribution technique

2007-08-14

2007-08-14

Bragdon, Reginald (Department: 2189)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S170000, C714S006130

Reexamination Certificate

active

11633900

ABSTRACT:
A semi-static distribution technique distributes parity across disks of an array. According to the technique, parity is distributed (assigned) across the disks of the array in a manner that maintains a fixed pattern of parity blocks among the stripes of the disks. When one or more disks are added to the array, the semi-static technique redistributes parity in a way that does not require recalculation of parity or moving of any data blocks. Notably, the parity information is not actually moved; the technique merely involves a change in the assignment (or reservation) for some of the parity blocks of each pre-existing disk to the newly added disk.

REFERENCES:
patent: 5615352 (1997-03-01), Jacobson et al.
patent: 6000010 (1999-12-01), Legg

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