Method and apparatus for raid load balancing

Details Method and apparatus for raid load balancing Method and apparatus for raid load balancing

2005-04-26

2005-04-26

Sparks, Donald (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S112000, C718S102000, C718S103000, C718S102000, C709S201000, C709S223000, C709S226000

Reexamination Certificate

active

06886074

ABSTRACT:
Methods and an apparatus for RAID load balancing are provided. One exemplary method includes establishing first and second counters where the first counter is associated with a first drive and the second counter is associated with a second drive. Next, a command is received form an operating system. Then, it is determined if the received command is a read command. If the received command is a read command, then the counters are examined to determine which of the counters is a lower value counter or if the counters are of equal value. Next, a drive associated with the lower value counter is selected or if the counters are of equal value a first drive is selected. The lower value counter is then incremented. Then, the read command is directed to the drive associated with the lower value counter or the first drive if the counters are of equal value.

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Jai Menon, Jeff Riegel, Jim Wyllie Software/hardware RAIDs 1063-6390/ IEEE 1995.

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