HP XP7 Storage - Manual (Page 123)

Figure 15 Delta Resync configuration with FS
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The Cnt Ac-S, Cnt Ac-J, and Cnt Ac-J delta resync pairs must be created before the remote FS
pairs.
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You can create a local FS pair before or after the delta resync pairs.
External Storage
You can create Cnt Ac-J pairs using External Storage-configured external volumes.
For more information, see the HP XP7 External Storage for Open and Mainframe Systems User
Guide.
Virtual LUN
•
Continuous Access Journal supports the Virtual LUN feature, which allows you to configure
custom-size LU that are smaller than standard-size LUs. When custom-size LUs are assigned
to a Continuous Access Journal pair, the S-VOL must have the same capacity as the P-VOL.
•
To perform Virtual LUN operations on a pair’s P-VOL and S-VOL, the pair must be deleted
and the volumes’ status returned to unpaired.
Auto LUN
You can specify the Continuous Access Journal P-VOL or S-VOL as Auto LUN source volumes.
However, when Cnt Ac-J pair status is COPY or PAIR, do not perform the volume migration
operation; otherwise, the operation is stopped.
Cnt Ac-J pair volumes and journal volumes cannot be used as Auto LUN target volumes.
External Storage 123