Patent ID: 7487294

Claim:
A RAID system, comprising: a plurality of disks; wherein at least a first group of the disks is selected to create a RAID 5 architecture, a second group of the disks within the first group is selected to create a RAID 1 architecture, the RAID 5 and RAID 1 architectures are concatenated, and the number of the disks in the first group is greater than 2, and that in the second group equals 2; wherein the RAID 5 architecture corresponding to the first group is created based on the disks having minimum disk capacity size among the first group, and the disks in the second group are the disks having remnant disk capacity after the disks in the first group are used to create the RAID 5 architecture, and the RAID 1 architecture corresponding to the second group is created with the remnant disk capacity based on the disks having minimum remnant disk capacity size among the second group.