Patent ID: 7970995
Filing Date: 2011-06-28
Classification: G06F

Abstract:
1. A storage system, comprising: a storage group configured by a plurality of storage devices; and a write controller that controls writing to the storage group, wherein the storage group being configured from a plurality of storage sub-groups, wherein respective storage sub-groups being configured from two or more storage devices of the plurality of storage devices, wherein the plurality of storage sub-groups being configured from a plurality of first type storage sub-groups and a plurality of second type storage sub-groups, wherein two or more storage devices, which configure respective second type storage sub-groups, being storage devices that respectively constitute components of the plurality of first type storage sub-groups, and therefore, respective storage devices that configure a storage group constituting components of both any of the plurality of first type storage sub-groups, and any of the plurality of second type storage sub-groups; wherein respective first type sub-group storage areas, which are respective storage areas of respective first type storage sub-groups, being configured from a plurality of rows of first type sub-group storage areas, wherein a row of first type sub-group storage areas spanning the two or more storage devices configuring the first type storage sub-group, and being configured from two or more first type sub-storage areas corresponding to these two or more storage devices, wherein respective second type sub-group storage areas, which are respective storage areas of respective second type storage sub-groups, being configured from a plurality of rows of second type sub-storage areas, wherein a row of second type sub-group storage areas spanning the two or more storage devices that configure the second type storage sub-group, and being configured from two or more second type sub-storage areas corresponding to these two or more storage devices, wherein respective second type storage sub-groups are RAID groups corresponding to RAID wherein two or more logical addresses respectively corresponding to two or more first type sub-group storage areas configuring a Pth row of first type sub-group storage areas inside a Kth first type storage sub-group, and two or more logical addresses respectively corresponding to two or more first type sub-group storage areas configuring a Pth row of first type sub-group storage areas inside a K+1st first type storage sub-group are consecutive (K and P being integers greater than 0).