HP XP7 Storage - Manual (Page 147)

Figure 47 Business Copy cascade volume pairs
Restrictions for Business Copy cascading volumes
Pair Creation. Pair creation of SVOL (oradb1) can only be performed after the pair creation of
S/PVOL (oradb). If you create the oradb1 pair first without creating the oradb, the subsequent
oradb creation will be rejected with EX_CMDRJE or EX_CMDIOE.
Pair splitting. Pair splitting of SVOL (oradb1) can only be performed after the S/PVOL (oradb) is
in a SMPL or PSUS state, since Business Copy copies are asynchronous. If pair splitting of the SVOL
(oradb1) is attempted while the S/PVOL (oradb) is in a COPY or PAIR state, the pairsplit
command is rejected with EX_CMDRJE or EX_CMDIOE.
Pair restore. Pair restore (resync from SVOL (oradb1) to S/PVOL) can only be performed when the
SVOL (oradb) and the PVOL (oradb2) on the S/PVOL are in a SMPL and PSUS state. If the pair
restore of SVOL (oradb1) is performed while either the SVOL (oradb) or PVOL (oradb2) on the
Business Copy operations 147