HP XP P9000 RAID Manager User Guide (T1610-96059, January 2014)

P-VOL_PSUS from/to S-VOL_SSUS(WE)T2: P-VOL_PSUS from/to S-VOL_SSUS(WE)
• If you attempt the pairevtwait -s psus in P-VOL_PSUS and S-VOL_COPY state, then pairevtwait
will return immediately even if the S-VOL is still in S-VOL_COPY state because P-VOL is already
in P-VOL_PSUS state. If you want to wait the "S-VOL_SSUS" state, and then you must check
the status of the S-VOL becomes "S-VOL_PSUS" via the return code using pairvolchk -ss
command on S-VOL side or pairvolchk -ss -c command on P-VOL side. Or you can use
pairevtwait -ss ssus on both P-VOL and S-VOL, pairevtwait -ss ssus -l on S-VOL locally.
• If you attempt the pairresync -restore or pairsplit -S in P-VOL_PSUS and S-VOL_COPY state,
then Business Copy will reject this command due to unable to perform. In this case, you need
to wait until the S-VOL state becomes S-VOL_SSUS.
Table 32 Pair status versus Snapshot commands
Snapshot CommandPair Status
pairresyncpairsplitpaircreate
Resync-S option-C option-E option-splitNo -split
RejectedAcceptableRejectedRejectedRejectedAccepted 2SMPL1
AcceptableRejectedRejectedRejectedRejectedAcceptableCOPY
RCPY
2
AcceptableAccepted 1Accepted 4RejectedAccepted*4AcceptablePAIR3
Accepted* 2Accepted 1AcceptableRejectedAcceptableRejectedPSUS
(PFUS)
4
Accepted* 2Accepted 1RejectedAcceptableRejectedRejectedPSUE5
Accepted*: A command is accepted and issued; whether this command is executed or not depends
on the microcode version of the RAID storage system.
NOTE:
• pairsplit ("simplex -S") of Snapshot volume is returned without verification of state transition
that waits until SMPL state. In SMPL state, the volume that was S-VOL becomes R/W disable
and data is discarded.
• In the "PSUE" state, Snapshot does not manage for differential data between the primary
volume and secondary volume.
Continuous Access Asynchronous, Continuous Access Synchronous, and Continuous
Access Journal volumes
Continuous Access Asynchronous/Continuous Access Journal provides paired volumes that use
asynchronous transfer to ensure the sequence of writing data between the primary volume and
secondary volume. The sequence of writing data between the primary and secondary volumes is
guaranteed within each consistency (CT) group (see Continuous Access Asynchronous consistency
groups (page 147)).
146 Data replication operations with RAID Manager