RAID Xanadu User Manual page 78

To restore a faulted pair, perform the replication operation below.
1. Execute the Forced Separate operation on the RV subject.
2. Execute an operation that returns to the previous state again (Replicate → Separate or
Restore).
Note: Although copying is started again, it is a full copy operation to which all areas of a logical
disk are subject.
About the storage system information save function
The storage system information save function backs up storage system information to the
storage system volume. (The storage system volume is configured on disk drives.)
If storage system information in cache memory is volatilized due to power-off in which the
disk array unit battery backup time is exceeded when power to the disk array unit was
disconnected by performing the procedure in 6.2 "Power-off Procedure", the next time the
disk array unit starts, it is restored from the storage system volume to cache memory.
Accordingly, it is not a full copy operation the first time that data is replicated. When using
the data replication function, it is recommended that you configure a storage system volume.
Storage system volume configuration is performed by Storage Manager.
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