HP XP7 Storage - Manual (Page 85)

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.
Powering-off systems intentionally
This topic 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 “Powering-off primary and
secondary systems at the same time” (page 85) .
Powering-off the primary or secondary system
To power off during copy operations
1.
Ensure that all pairs or mirrors are split and that the status of all the pairs is PSUS. Otherwise
the pairs could be suspended due to failure.
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 operations; otherwise the pairs could be suspended with a failure.
4. When the system is ready to resume copy operations, on the local site, resynchronize the
pairs that have been split.
5. Confirm that the status of the pairs is COPY or PAIR.
Correcting errors made when powering-off
If a secondary system remains in Suspending status because you powered-off while the primary
system was copying data, delete the pair forcibly in both primary and secondary system and then
recreate the pair.
Powering-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.
The following is the procedure for powering off the primary and secondary systems at the same
time:
1.
Split all pairs that will be affected. For example, if two primary systems and one secondary
system are connected to each other and you want to power off one of the primary system and
the secondary system, you must split the pairs on all three systems since they are all affected.
2. After the pairs are split, confirm that their status is PSUS at the primary system.
3. Power off the primary system.
4. Power off the secondary system.
5. Power on the secondary system.
6. When the secondary system is ready to resume copy operations, power on the primary system.
CAUTION: Wait five (5) minutes after powering on a system before performing Continuous
Access Journal operations; otherwise the pairs could be suspended with a failure.
Managing power-off for systems and network devices 85