Storage system and method for saving energy based on storage...

Details Storage system and method for saving energy based on storage... Storage system and method for saving energy based on storage...

2008-01-31

2008-12-30

Cao, Chun (Department: 2115)

Electrical computers and digital processing systems: support

Computer power control

Power conservation

C713S324000

Reexamination Certificate

active

07472298

ABSTRACT:
An example of the invention classifies disks drives based on their purpose and associating power-saving policies in multiple classes. The system implements Power On Demand, where a reduced power mode is enabled for every individual component of a storage subsystem. In addition, an embodiment of this invention extends a few power modes used in the prior art and allows almost infinite number of power modes when instructing a disk drive (via its I/O interface such as a SCSI or fiber channel interface) to enter a certain power saving mode. Furthermore, an embodiment of invention teaches a system and methods to save power in a disk system comprising a plurality of disk controllers and a plurality of disk drives, arranged in a plurality of arrays, where each array includes several (e.g., 4-16) disk drives.

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