HP StorageWorks XP Remote Web Console Software - Manual (Page 19)

Using XP Continuous Access Software
You can use XP Thin Provisioning in combination with XP Continuous Access to replicate V-VOLs.
You can also use XP Continuous Access as a tool to move the data of the V-VOL for I/O load
reasons. The recommended movement is between the P-VOL in pool A and S-VOL in pool B.
Figure 8 (page 19) illustrates the interaction when the XP Continuous Access P-VOL and S-VOL are
also XP Thin Provisioning V-VOLs. Table 6 (page 19) lists the specifics.
Figure 8 Using XP Thin Provisioning Software
Table 6 Supported XP Continuous Access Software and XP Thin Provisioning Combinations
Explanation XP Continuous Access S-VOL XP Continuous Access P-VOL
Supported
At initial PAIR create time, pages in the
S-VOL are freed if not needed for
replicating the P-VOL. XP Thin Provisioning V-VOLs XP Thin Provisioning V-VOLs
Supported, but the Quick Restore
function is not available. Normal volumes XP Thin Provisioning V-VOLs
Supported, but the Quick Restore
function is not available.
This combination consumes the same
amount of pool capacity as the original
normal volume (P-VOL).
XP Thin Provisioning V-VOLs Normal volumes
NOTE: You cannot specify an XP Thin Provisioning pool-VOL as an XP Continuous Access P-VOL
or S-VOL. If the cache write pending rate exceeds 55%, the copy process stops temporarily.
If you retry the Quick Restore or XP Auto LUN function on V-VOLs where Quick Restore has been
already been performed, error 5208 65714 may occur. If the error occurs, use the following
equation to calculate how long to wait before retrying:
(Pool Capacity in terabytes x 3 seconds) + 40 minutes
Heavy workload on the storage system could add additional time to the wait period. If the V-VOL
operation status is in Processing state, then wait for the state to change to Ready before attempting
Auto LUN or Quick Restore.
Using XP Continuous Access Journal Software
You can use XP Thin Provisioning in combination with XP Continuous Access Journal to replicate
V-VOLs. You can also use XP Continuous Access Journal as a tool to move the data of the V-VOL
for I/O load reasons. The recommended movement is between the P-VOL in pool A and S-VOL in
pool B.
Figure 9 (page 20) illustrates the interaction when the XP Continuous Access Journal P-VOL
and S-VOL are also XP Thin Provisioning V-VOLs. Table 7 (page 20) lists the specifics.
Interoperability with Other Products and Functions 19