Power off the secondary storage system – HP XP Continuous Access Software User Manual
Page 157
If you turn the power off without changing the status of all data volume pairs to PSUS, and then
you turn the power back on, the status of all data volume pairs could be suspended due to a failure.
Power Off the Secondary Storage System
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 (that is, pairs of journal
groups) are split, and that the status of all the data volume pairs is PSUS.
If the delta resync function that uses a remote command devices is used, the SIM (SIM reference
code = EFD0) that suggests that the device connected to the external storage system has been
blocked, is reported to the destination storage system(s) because the command devices are blocked
due to a power-off of 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.
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
COPY or PAIR. This operation must be performed at the primary site.
After you take these steps, remote copy operations resume. The secondary storage system can
issue
read journal
commands to the primary storage system.
If you turn the power off without changing the status of all data volume pairs to PSUS, and then
you turn the power back on, the status of all data volume pairs could be suspended according to
a failure.
Power Off the Primary and Secondary Storage Systems at the Same Time
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. 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.
Follow this procedure to power off the primary and secondary storage systems at the same time:
1.
Split data volume pairs that will be affected by powering off the primary and secondary
storage systems.
For example, if two primary storage systems and one secondary storage system are connected
to each other, and you want to power off one of the primary storage systems 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 the storage systems.
2.
After the splitting of the pairs finishes, confirm that the status of all the pairs is changed to
PSUS at the primary storage system.
3.
Power off the primary storage system as described in
“Power Off the Primary Storage System”
. Do not power on the primary storage system yet.
4.
Power off the secondary storage system as described in
“Power Off the Secondary Storage
.
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 COPY or PAIR.
After turning the power on or off for both the primary and secondary storage system at the same
time, if the status of a data volume pair of the primary storage system is PSUS and the status of a
Managing Power for Storage Systems and Network Relay Devices
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