HP StorageWorks XP Remote Web Console Software - Manual (Page 197)

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 primary storage systems. When powering off the primary storage systems, you must power
off the supervisor DKC first, and then the subordinate DKCs.
CAUTION: If you want to power off the primary storage system, contact your HP account team
and ask them to power off the storage system.
If data volume pairs are split and the primary storage system is powered off as mentioned above,
you can resume remote copy operations by taking the following steps:
1. Power on the primary storage system.
If more than one primary storage system is to be used with extended consistency groups,
power on the subordinate DKCs first, and then the supervisor DKC.
2. If the primary storage system is ready to resume 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 duplex or Duplex. This operation must be performed at the primary site.
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, 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 (for example,
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, contact your HP 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, 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, 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.
Turning Off Power Intentionally 197