Patent ID: 7194580
Filing Date: 2007-03-20
Classification: G06F

Abstract:
1. A disk array device having a plurality of disks, each of said disks being divided into a plurality of partitions, and a plurality of redundancy groups, each of said redundancy groups having a plurality of partitions, each of said partitions of each of said redundancy groups belonging to a disk different from the disks the other partitions of the same redundancy group belong to, said disk array device comprising: means for dividing a newly added disk into a plurality of partitions; means for selecting, as an origin of copying a partition, a partition included in one of the existing redundancy groups but not sharing a disk with any other origin of copying a partition of any other existing redundancy group; means for selecting a partition of said newly added disk as a destination of copying a partition; means for repeating copying the data of an origin of copying a partition to a destination of copying a partition for a plurality of existing redundancy groups; means for excluding the origin of copying partitions from the existing redundancy groups said origin of copying partitions have belonged to and adding the destination of copying partitions to the redundancy groups the origin of copying partitions have belonged to; and means for preparing a new redundancy group by collecting the excluded plurality of partitions.