IBM Advanced SerialRAID Adapters SA33-3285-02 User Manual page 68

This problem can be solved if, in each building, a hot spare pool is created for the disk
drives. In Figure 18, all the disk drives in building 1 have been made members of pool
A1, and all the disk drives in building 2 have been made members of Pool A2. A failure
of a member disk drive in Pool A1 now causes pdisk1 to be selected as the hot spare
disk drive.
Building 1
pdisk1
A (Spare)
D
A
P
T
E
R
pdisk12
Figure 18. Primary Disk in Building 1; Secondary Disks in Building 2; Pools
Hot spare pools can be configured in other ways, as shown in figures 19 through 21.
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User's Guide and Maintenance Information
Pool A1
pdisk2 pdisk3
pdisk11 pdisk10
Primary Disks
Building 2
Pool A2
pdisk4 pdisk5
(Spare)
pdisk9 pdisk8
Secondary Disks
pdisk6
A
D
A
P
T
E
R
pdisk7