HP P9000 Snapshot User Guide (AV400-96394, October 2011)

Copy pair status changes from PSUS while splitting pairs in a consistency group, the Snapshot
data cannot keep consistency.
Table 8 BC Operations when P-VOL shared with SS P-VOL
Snapshot StatusBusiness Copy Operation
PSUECOPY (RS-R)COPY (RS)SMPL (PD)PSUSPAIRCOPY
YesNoYesYesYesYesYesCreate pair
YesNoYesYesYesYesYesCreate and split pair
YesNoYesYesYesYesYesSplit pair
YesNoYesYesYesYesYesForward pair resynchronization
YesNoYesYesYesYesYesNormal backward pair
resynchronization
NoNoNoNoNoNoNoQuick backward pair
resynchronization
YesYesYesYesYesYesYesSuspend pair
YesYesYesYesYesYesYesDelete pair
Table 9 BC Operations when S-VOL shared with SS P-VOL
Snapshot StatusBusiness Copy Operation
PSUECOPY (RS-R)COPY (RS)SMPL (PD)PSUSPAIRCOPY
NoNoNoNoNoNoNoCreate pair
NoNoNoNoNoNoNoCreate and split pair
YesNoYesYesYesYesYesSplit pair
YesNoYesYesYesYesYesForward pair resynchronization
YesNoYesYesYesYesYesNormal backward pair
resynchronization
NoNoNoNoNoNoNoQuick backward pair
resynchronization
YesNoYesYesYesYesYesSuspend pair
YesYesYesYesYesYesYesDelete pair
You can perform Business Copy operations while splitting pairs in a consistency group. However,
the Snapshot data cannot keep consistency.
For more on Business Copy pair status and operations, see the HP P9000 Business Copy User
Guide.
Restrictions
• A Snapshot pair whose P-VOL is shared with a Business Copy pair’s P-VOL or S-VOL cannot
have the same mirror unit (MU) number as the Business Copy pair.
• Because a Snapshot S-VOL uses the data in the P-VOL, the Business Copy Quick Restore
operation is not allowed.
Continuous Access Synchronous or Continuous Access Journal
Snapshot P-VOLs can be shared with Continuous Access Synchronous (Cnt Ac-S) or Continuous
Access Journal (Cnt Ac-J) pair volumes. Snapshot’s pair operations are more restricted when shared
Continuous Access Synchronous or Continuous Access Journal 21