HP XP Continuous Access Software - Manual (Page 204)

1. Split data volume pairs that are affected by powering off the primary and secondary arrays.
For example, if two primary arrays and one secondary array are connected to each other
and you want to power off one of the primary arrays and the secondary array, split data
volume pairs defined between the remaining one primary array and primary array, because
these data volume pairs are affected by powering off of the arrays.
2. After splitting the pairs finishes, confirm that the status of all pairs is changed to PSUS at the
primary array.
3. Power off the primary array as described in When powering off primary arrays . Do not power
on the primary array yet.
4. Power off the secondary array as described in When powering off secondary arrays .
5. Power on the secondary array.
6. If the secondary array is ready to resume remote copy operations, power on the primary
array.
7. If the primary array is ready to resume remote copy operations, resume data volume pairs
that were split at the primary array. Confirm that the status of data volume pairs changed to
COPY or PAIR.
When powering off network relay devices
To power off a network relay device during remote copy operations, first ensure that all data
volume pairs or mirrors (that is, pairs of journal groups) are split and the status of all data volume
pairs is PSUS.
If data volume pairs are split and the network relay device is powered off as mentioned above,
use the following procedure to resume remote copy operations:
1. Power on the network relay device.
2. If the network relay device is ready for remote copy operations, restore data volume pairs
that were split, and confirm that the status of data volume pairs is COPY or PAIR. This operation
must be performed at the primary site.
204 Power management for arrays and network relay devices