HP XP P9500 Storage - Manual (Page 102)

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 Suspend 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 Z operations; otherwise the pairs could be suspended with a failure.
7. When the primary system is ready to resume copy operations, restore the pairs that have been
split at the primary system. Confirm that the status of the pairs is changed to Pending duplex
or Duplex.
After turning power on or off for both the primary and secondary system at the same time, if pair
status at primary system is Suspend and a status of a pair of secondary storage system is Duplex,
use Remote Web Console to suspend the pair of the secondary system. After confirming that the
statuses of the pair on both systems is Suspend, restore the pair at the primary system.
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 be
suspended according to a failure.
Power-off network relay devices
To power off a network relay device during copy operations
1. Insure that all pairs or mirrors are split and that the status of all the pairs is Suspend.
2. Power off the device.
3. When ready power on the network relay device.
4. When the network relay device is ready for copy operations, from the primary site, restore
the pairs that have been split.
5. Confirm that pair status is Pending duplex or Duplex.
102 Maintaining the system