HP StorageWorks XP Remote Web Console Software - Manual (Page 195)

Chapter 5 Configuring Storage Systems and Logical Paths 5-25
Hitachi Universal Replicator for IBM /OS User’s Guide
After you take these steps, remote copy operations will be resumed. The
primary storage system will be able to respond to read journal commands
issued by the secondary storage system.
Note : If you want to power off both the primary and secondary storage systems
at the same time, please see the next section.
Note : 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.
When You Power Off the Secondary Storage System
If you want to power off the secondary storage system during remote copy
operations, you must ensure, before powering off the storage system, 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 more than one primary and secondary storage systems are used with
extended consistency groups, you must split all data volume pairs in the
extended consistency groups before powering off the secondary storage
systems. When powering off the secondary storage systems, you must power
off the supervisor DKC first, and then the subordinate DKCs.
Caution : If you want to power off the secondary storage system, please contact
your Hitachi account team and ask them to power off the storage system.
If data volume pairs are split and the secondary storage system is powered off
as mentioned above, you can resume remote copy operations by taking the
following steps:
1. Power on the secondary storage system.
If more than one secondary storage system is to be used with extended
consistency groups, power on the subordinate DKCs first, and then the
supervisor DKC.
2. If the secondary storage system is ready to resume 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.
After you take these steps, remote copy operations will be resumed. The
secondary storage system will be able to issue read journal commands to the
primary storage system.
Note : If you want to power off both the primary and secondary storage systems
at the same time, please see the next section.
Important : 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.