RAID systems and setup methods thereof are provided. At least a first
group of disks is selected to create a RAID 0 architecture. A second
group of disks is further selected to create the RAID 0 architecture. The
RAID 0 architectures are concatenated. The second group is within the
first group, and the disks of the second group are the disks having
remnant disk capacity after the RAID 0 architecture of the first group is
created. The RAID 0 architectures corresponding to the first and second
group are created respectively based on the disk having minimum disk
capacity size among the disks of the first and second group.