HP XP P9500 Storage - Manual (Page 101)

When power is removed from network relay devices
If power is removed from a network relay device during remote copy operations, the primary and
secondary systems assume that a failure has occurred and split all pairs.
Power-off storage systems intentionally
This section explains what should be noted when you intentionally power off systems or network
relay devices.
NOTE: To intentionally power off the primary or secondary system, contact your HP account
team and ask them to power off the system.
To power off primary and secondary systems at the same time, see “Power-off primary and
secondary systems at the same time” (page 101) .
Power-off the primary or secondary system
To power off during copy operations
1. Insure that all pairs or mirrors are split and that the status of all the pairs is Suspend.
CAUTION: If you turn the power off without changing the status of all data volume pairs to
Suspend, and then you turn the power back on, the status of all data volume pairs could
become suspended when there is a failure. If you power off the secondary system while the
primary system is copying data by creating or recovery pair operations, the pair status of the
secondary system might remain Suspending. In this case, delete the pair forcibly on both the
primary and secondary systems and create a pair again.
If multiple primary and secondary systems are used with EXCTGs, insure that all pairs in
EXCTGs are split. When powering off the primary systems, power off the supervisor DKC first,
and then the subordinate DKCs.
2. Turn power off.
3. When ready, power on the system.
CAUTION: Wait five (5) minutes after powering on a system before performing Continuous
Access Journal Z operations; otherwise the pairs could be suspended with a failure.
4. When the system is ready to resume copy operations, on the primary site, restore the pairs
that have been split.
5. Confirm that the status of the pairs is Pending duplex or Duplex.
Correcting errors made when powering-off
If a secondary system remains in Suspending status because you initiated a power-off while the
primary system was copying data, delete the pair forcibly in both the primary and secondary
systems and then recreate the pair.
Power-off primary and secondary systems at the same time
The primary system must be powered off before the secondary system is powered off. When you
are ready to power the systems on, the secondary system must be powered on before the primary
system.
If multiple primary and secondary systems are used with EXCTGs, insure that all pairs in the EXCTGs
are split. When powering off the primary systems, power off the supervisor DKC first, and then the
subordinate DKCs.
The following is the procedure for powering off the primary and secondary systems at the same
time:
Manage power-off for systems and network devices 101