HP StorageWorks P9000 User Manual page 149

Figure 25 Shared Continuous Access Journal and Business Copy primary volume
A Continuous Access Journal secondary volume shared with the Business Copy primary volume
is illustrated below. With this configuration, multiple backup copies of the Continuous Access
Journal primary volume can be made on the remote system.
CAUTION: When you share a Continuous Access Journal S-VOL with a Business Copy P-VOL
as shown in the following figure, the write operation to the Continuous Access Journal P-VOL
takes time. Especially, when the Business Copy pair is in the PSUS(SP) status, the write operation
to the Continuous Access Journal P-VOL may take extra time depending on the time needed
for copying the Business Copy pair.
In addition, if the journal volume size is small, the Continuous Access Journal pair may be
suspended by failure because of the shortage of the capacity of its journal volume.
Figure 26 Shared Continuous Access Journal secondary volume and Business Copy primary
volume
A Continuous Access Journal primary volume and an secondary volume shared with Business
Copy primary volumes is illustrated below. This configuration provides multiple copies of the
primary volume at the local and remote sites.
Configurations with Business Copy primary volumes 149