Priority management of a disk array

Details Priority management of a disk array Priority management of a disk array

2005-01-04

2005-01-04

Padmanabhan, Mano (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S151000, C711S158000, C710S036000, C710S039000, C710S040000, C710S244000

Reexamination Certificate

active

06839817

ABSTRACT:
In a first form, a method for managing requests in a disk array having a number of disks includes associating priorities with respective requests. A new request is processed, which includes determining a maximum priority for at least certain ones of requests received and comparing the priority of the new request to the maximum priority. Responsive to the comparison, a selection is made between i) categorizing the new request as a foreground disk operation and ii) categorizing the new request as a background disk operation. A selection is also made between i) working the new request on at least one of the disks and ii) placing the new request in a queue.

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