US Patent 7281088 Disk array apparatus and disk array apparatus controlling method
Patent 7281088 was granted and assigned to Hitachi on October, 2007 by the United States Patent and Trademark Office.
All edits
Times at which requests for a data read or data write from/to a logical volume are received are stored in memory as access times of a RAID group making up the logical volume. When a predetermined time has elapsed after the access time, a number of the hard disk drives according to the redundancy of the RAID group are set to a power saving mode. Assume there are first hard disk drives and second hard disk drives having shorter lifes and the RAID group exceeds a predetermined time after the access time. When the RAID group consists of only the first drives, a number of the first drives according to the redundancy of the RAID group are set to a power saving mode and when it consists of only the second drives, an arbitrary number of second drives are set to a power saving mode.
US Patent 07281088 Disk array apparatus and disk array apparatus controlling method US Patent 7281088 Disk array apparatus and disk array apparatus controlling method
US Patent 07281088 Disk array apparatus and disk array apparatus controlling method
Find more entities like US Patent 7281088 Disk array apparatus and disk array apparatus controlling method
