HP XP P9500 Storage - Manual (Page 49)

To turn on the power supply of the local storage system to restart from the turned off status:
1. Turn on the external storage system that contains the external volume, which is mapped as an
internal volume.
2. Turn on the power supply of the local storage system.
CAUTION:
•
When the local storage system is turned off after the Disconnect External Storage Systems
command is executed, you cannot access the mapped external volume from the local storage
system as you just turn the local storage system on. It is necessary to execute the Reconnect
External Storage Systems command to resume using the mapped external volume. The Reconnect
External Storage Systems command checks whether there is a match between the defined
information and the actual status of the external volume mapped as an internal virtual volume.
If the external volume is ready to be used as a mapped volume, the volume is set to accept
the I/Os and you can resume using the volume as a mapped volume.
•
When the Disconnect External Storage Systems command or the Disconnect External Volumes
command is executed and all the data in the cache memory is written to the external volume,
Disconnect appears for the external volume status in the window.
Turning on or off both storage systems
This section explains how to turn on or off the power supply of the local and external storage
systems, and uses Business Copy as an example.
To turn off the power supply of both storage systems:
1. Stop the read or write I/O to the local storage system. All read and write I/Os with fibre
channel connections should be stopped.
2. Split all Business Copy pairs (pairsplit operation). For details on the pairsplit operation, see
the HP P9000 Business Copy User Guide.
3. Turn off the power supply of the local storage system.
CAUTION: Make sure that the power supply of the local storage system is completely off
and then go to the next step.
4. Turn off the power supply of the external storage system.
CAUTION: Make sure that the power supply of the external storage system is completely
off.
To turn on the power supply of both storage systems:
1. Turn on the power supply of the external storage system.
CAUTION: Make sure that the power supply of the external storage system is completely on
and then go to the next step.
2. Turn on the power supply of the local storage system.
CAUTION: Make sure that the power supply of the local storage system is completely on
and then go to the next step.
3. Resynchronize all Business Copy pairs (pairresync operations).
For details on the pairresync operation, see the HP P9000 Business Copy User Guide.
Turning on or off the storage system 49