HP StorageWorks XP Remote Web Console Software - Manual (Page 198)

When You Power Off the Primary and Secondary Storage Systems at the Same Time
If you want to power off the primary and secondary storage systems at the same time, the primary
storage system must be powered off before the secondary storage system is powered off. If you
want to power on the primary and secondary storage systems again, the secondary storage system
must be powered on before the primary storage system is powered on.
If more than one primary and secondary storage systems are used with extended consistency
groups, you must first power off all the primary storage systems, and then the secondary storage
systems. When you power on the primary and secondary storage systems again, you must first
power on all the secondary storage systems, and then the primary storage systems.
The following is the procedure for powering off the primary and secondary storage systems at the
same time:
1. Split data volume pairs that will be affected by powering off of the primary and secondary
storage systems.
For example, if two primary storage systems and one secondary storage systems are connected
to each other and you want to power off one of the primary storage system and the secondary
storage system, you must split data volume pairs that are defined between the remaining one
primary storage system and the primary storage system, because these data volume pairs will
be affected by powering off of the storage systems.
2. After the splitting of the pairs finishes, confirm that the status of all the pairs is changed to
Suspend at the primary storage system.
3. Power off the primary storage system as described previously. Do not power on the primary
storage system yet.
4. Power off the secondary storage system as described previously.
5. Power on the secondary storage system.
6. If the secondary storage system is ready to resume remote copy operations, power on the
primary storage system.
7. If the primary storage system is ready to resume remote copy operations, resume the data
volume pairs that have been split at the primary storage system. Confirm that the status of the
data volume pairs is changed to Pending or Duplex.
NOTE: After you turned the power on or off both the primary and secondary storage system at
the same time, if a status of a data volume pair of primary storage subsystem is Suspend and a
status of a data volume pair of secondary storage subsystem is Duplex, you must suspend the data
volume pair of secondary storage system by using XP Remote Web Console. After confirming that
the statuses of the data volume pair of primary storage system and secondary storage system are
Suspend, restore the data volume pair that has been split at the primary storage system.
When You Power Off Network Relay Devices
If you want to power off a network relay device during remote copy operations, you must ensure,
before powering off the device, that all data volume pairs or mirrors (i.e., pairs of journal groups)
are split, and that the status of all the data volume pairs is Suspend.
If data volume pairs are split and the network relay device is powered off as mentioned above,
you can resume remote copy operations by taking the following steps:
1. Power on the network relay device.
2. If the network relay device is ready for remote copy operations, restore the data volume pairs
that have been split, and then confirm that the status of the data volume pairs is Pending or
Duplex. This operation must be performed at the primary site.
198 Managing Power for Storage Systems and Network Relay Devices