IBM Advanced SerialRAID Adapters SA33-3285-02 User Manual page 67

If pdisk2 fails, the hot spare disk drive pdisk4 might replace pdisk 2 as one of the
primary disk drives in the array, as shown in Figure 17.
Building 1
pdisk1
A
(Spare)
D
A
P
T
E
R
pdisk12
Figure 17. Primary Disk in Building 1; Secondary Disks in Building 2; Distributed Spares
Now, assume that for some reason, the disk drives in building 2 are no longer available.
The example array is now in the Offline state because one of its four primary disk
drives is in building 2. Only the three primary disk drives that are in building 1 are
operational.
pdisk2 pdisk3
(Failed)
pdisk11 pdisk10
Primary Disks
Building 2
pdisk4 pdisk5
pdisk9 pdisk8
Secondary Disks
Chapter 5. Hot Spare Management
pdisk6
A
D
A
P
T
E
R
pdisk7
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