HP StorageWorks XP Remote Web Console Software - Manual (Page 211)

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.
Once powered 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, please 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.
Hitachi Universal Replicator for z/OS user guide for XP12000/XP10000 Disk Arrays and SVS 200 211