HP StorageWorks XP Remote Web Console Software - Manual (Page 196)

5-26 Chapter 5 Configuring Storage Systems and Logical Paths
Hitachi Universal Replicator for IBM /OS User’s Guide
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 Storage Navigator. 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.