If your server contains the following:
Express configuration will create three logical devices and one hot-spare drive as follows:
Logical device A: The total capacity of this logical device is 940 MB (1 x 1024 MB - raid signature) and it contains one, 940 MB RAID level-0 (simple volume) logical device.
Logical device B: The total capacity of this logical device is 2066 MB (2 x 2150 MB - redundant storage - raid signature) and it contains one, 2066 MB RAID level-1 logical device.
Logical device C: The total capacity of this logical device is 8433 MB (3 x 4300 MB - redundant storage - raid signature) and it contains one, 8433 MB RAID level-5 logical device.
Hot Spare: Express configuration defines one of the four 4300 MB drives as a hot-spare drive.
x-1022-ASM-00-08-EN