HP StorageWorks XP24000 for FlashCopy Mirroring Software User's Guide (T5240-96001, June 2007)

ShadowImage for z/OS
T-VOL
Shared S-VOL
T-VOL
Version2
Figure 19 Pair Configuration Where an S-VOL of Version 2 and ShadowImag e for
Mainframe is Shared
Usually, you need to specify a volume in Simplex status as a c opy source (S-VOL) or a copy target
(T-VOL). When you specify a ShadowImage for Mainframe S-VOL as a copy source, you can establish a
Version 2 relationship only if the ShadowImage for Mainframe pair is not in Resync-R status.
You can establish or release Version 2 relationships if you meet the requirements in
“Copying by Volume” on page 45 and “Copying by Dataset” on page 45. When there is a Version 2
relationship, you cannot perform backward resynchronization (that is, Reverse Resync or Q u ick Restore)
on the
ShadowImage for Mainframe p air.
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 cases shown below, you cannot create ShadowImage for Mainframe pairs (see also
Figure 20 on page 50):
• The case when the S-VOL of the Version 2 relationship and the T-VOL of the S hadowImage for
Mainframe pair are shared.
• The case when the T-VOL of the Version 2 relationship and the T-VOL of the ShadowImage for
Mainframe pair are shared.
• The case when the T-VOL of the Version 2 relationship and the S-VOL of the ShadowImage for
Mainframe pair are shared.
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