The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 30, 2008
Filed:
Jan. 31, 2008
Peter Kimmel, Kaiserslautern, DE;
Thomas Gardelegen, Wiesbaden, DE;
Nils Haustein, Soergenloch, DE;
Daniel James Winarski, Tucson, AZ (US);
Peter Kimmel, Kaiserslautern, DE;
Thomas Gardelegen, Wiesbaden, DE;
Nils Haustein, Soergenloch, DE;
Daniel James Winarski, Tucson, AZ (US);
International Business Machines Corporation, Armonk, NY (US);
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.