HP StorageWorks XP24000 Continuous Access Journal Software User and Reference Guide, v01 (T5278-96001, June 2007)

use Business Copy to provide multiple backup copies of a single Continuous Access Journal
primary data volume.
Figure 12 Sha
red
Contin u ous Acces s Journal Secon dar y D ata Volume and B usiness
Copy P-VOL
Caution: When you share a Continuous Access Jo urnal secondar y data volume with a Business Copy
P-VOL as show
nin Figure 12 on pag e 55, the write operation to the Continuous Access Journal primary
data volume takes time. In particular, when the Business Copy pair is in PSUS(SP) status, the write
operation to the Continuous Access Journal primary data volume may take extra time because of the time
for the copy
process on the Business Copy pair.
In addition, note that if the journal volume size is small, the Continuous Access Journal pair may be
suspended due to a failure b ecause of the shortage of the capa city of its journal volume.
• Continuous
Access Journal/Business Co py configuration which shares the Continuous Access
Journal primary data volume and Business Copy P-VOL, and Continuous A ccess Journal
secondary data volume and Busin ess Copy P-VOL
Figure 13 on
page 55 combines the configurations s hown in Figure 11 on page 54 and
Figure 12 on page 55. Within a single Continuous Access Journal pair, the primary data volume
and secondary data volume a re both functioning as Business Copy P-VOLs, providing multiple
copies at the primary and remote sites.
Figure 13 Shared Continuous Access Journal Primary D a ta Volume and Business
Copy P-VOL, an d C on tin u ous Access Journal Secon dar y Data Vo lum e and Business
Copy P-VOL
• Continuous Access Journal/Business Copy co n fi guration where a Busi ness Copy S-VOL in PSUS
status is u sed as a Continuous Access Journal primary d ata volume
In the following example, a Business Copy S-VOL in PSUS status is also functioning as a
Continuous Access Journal primary data volume. This configuration allows Continuous Access
Journal to make a remote backup copy of the Business Copy S-VOL.
XP24000 Continuous Access Journal Software User a nd Reference Guide
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