Fujitsu Eternus DX80 S2 - Hot Spares; Figure 4.11 Drive Combination 3; Figure 4.12 Hot Spares

Chapter 4 System Configuration
4.5 Hot Spares
ETERNUS DX80 S2/DX90 S2 Disk storage system Overview
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Example 3: Paired drives are installed in three different drive enclosures
Figure 4.11 Drive combination 3
4.5 Hot Spares
Hot spares are used as spare drives for when drives in a RAID group fail, or when drives are in error status.
Figure 4.12 Hot spares
DE#02
B' C'
DE#01
Mirroring
CA'
DE#00
Mirroring
AB
Hot spare
Failure
RAID group