User`s guide

StorageWorks RAID Array 200 Controller Installation and Standalone Configuration Utility
6–18 EK–SWRA2–IG. C01
Table 6–1 Data Availability Configuration Through RAID 5
Drive
Group
Number
of Drives
in Group Drive Location
Group
Type
Usable
Capacity
A 3 Drive 1 = Ch 0, SCSI ID 0 RAID 5 2GB
Drive 2 = Ch 1, SCSI ID 0
Drive 3 = Ch 2, SCSI ID 0
B 3 Drive 1 = Ch 0, SCSI ID 1 RAID 5 2GB
Drive 2 = Ch 1, SCSI ID 1
Drive 3 = Ch 2, SCSI ID 1
G 3 Drive 1 = Ch 0, SCSI ID 6 RAID 5 2GB
Drive 2 = Ch 1, SCSI ID 6
Drive 3 = Ch 2, SCSI ID 6
Total Total Total Total
7 21 drives 7 RAID 5 14 GB
This example shows all of the 21 drives in the subsystem being used in drive
groups; however, you may want to create fewer drive groups and use some of the
21 drives as hot spare drives, on which the controller would automatically begin
to rebuild data from a failed drive in one of these RAID 5 redundant group types.