HP StorageWorks XP24000/XP20000 for FlashCopy Mirroring Software User Guide (T5240-96012, May 2011)

You can establish or release a Version 2 relationship if you meet these requirements. When there
is a Version 2 relationship, you cannot perform the backward resynchronization (that is, Reverse
Resync or Quick Restore) on the ShadowImage for Mainframe pair.
Even if the ShadowImage for Mainframe S-VOL already has three T-VOLs, you can create up to
16 pairs by specifying the volumes of Version 2 relationships as the copy source.
In the following cases, you cannot create ShadowImage for Mainframe pairs (see “Version 2 and
ShadowImage for Mainframe: Non-sharable Combinations” (page 55)):
• The S-VOL of the Version 2 relationship and the T-VOL of the ShadowImage for Mainframe
pair are shared.
• The T-VOL of the Version 2 relationship and the T-VOL of the ShadowImage for Mainframe
pair are shared.
• The T-VOL of the Version 2 relationship and the S-VOL of the ShadowImage for Mainframe
pair are shared.
When you use Version 2, you cannot create pairs sharing the volumes shown in “Version 2 and
ShadowImage for Mainframe: Non-sharable Combinations” (page 55).
Figure 30 Version 2 and ShadowImage for Mainframe: Non-sharable Combinations
Using Version 2 with TrueCopy for Mainframe
• Volumes that can be shared:
The following table shows the combination of volumes when you use Version 2 with TrueCopy
for Mainframe. Basically, TrueCopy for Mainframe includes both TrueCopy Synchronous for
Mainframe and TrueCopy Asynchronous for Mainframe. For details about the Preserve
Mirror Flashcopy function, see “ Preserve Mirror FlashCopy Function” (page 48).
Interoperability With Other Products and Functions 55