HP XP7 Storage - Manual (Page 153)

Figure 21 Shared Cnt Ac-J Z and BC Z primary volume
Business Continuity Manager allows you to set the starting time of the backup copy to journals.
In the above configuration, if you set the starting time of the backup copy, the write operations
to the P-VOL up to that time are backed up to the S-VOL. If the above configuration is used in
multiple journal volumes in multiple storage system, you can set the same starting time of the
backup copy to all the journals. If you do this, the P-VOLS are backed up across the multiple
disk systems at the same time.
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A Cnt Ac-J Z secondary volume shared with the BC Z primary volume is illustrated below.
With this configuration, multiple backup copies of the Cnt Ac-J Z primary volume can be made
on the secondary system.
You can specify a split time for BC Z pairs on the secondary system. See the section on using
the ATTIME Suspend operation in the HP XP7 Business Copy for Mainframe Systems User
Guide’s appendix on sharing volumes for more information.
CAUTION: When you share a Cnt Ac-J Z S-VOL with a BC Z P-VOL as shown in the following
figure, the restore operation to the Cnt Ac-J Z S-VOL takes time. This is especially the case
when the BC Z pair is in the V-Split/SUSPVS status because of the time needed to copy the
BC Z pair.
Because of the extra time that may be needed, make sure the Cnt Ac-J Z journal volume is
sized with enough capacity to handle the possible increase in I/O. If journal volume capacity
is insufficient, the pair will suspend because of failure. If necessary, contact HP Support for
assistance.
Figure 22 Shared Cnt Ac-J Z S-VOL and BC Z primary volume
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Cnt Ac-J Z primary and secondary volumes shared with BC Z primary volumes is illustrated
below. This configuration provides multiple copies of the source volume at the local and remote
sites.
Configurations with Business Copy Z primary volumes 153