HP XP P9500 Storage - Manual (Page 51)

3. If the external volume was defined as a THP V-VOL in the local system, restore all blocked
THP V-VOLs.
Procedure 21 To restore all THP V-VOLs in the pool
1. Click Pools in the Storage Systems tree.
2. In the tree, select the pool to be restored.
3. Select the Virtual Volumes tab.
4. Click Select All Pages.
5. On the menu bar, click Actions, Logical Device, and then Restore LDEVs.
6. In the Restore LDEVs window, confirm the settings and enter the task name in the Task Name
box.
7. Click Apply in the Confirm window.
Powering off and on the local storage system
Prerequisite information
You do not need to disconnect the external system when powering off only the local system.
However, if you do disconnect, when you power on the local system again, access is disabled to
the external system until you reconnect.
Procedure 22 To power off the local system, then power on again
1. Stop read and write I/O to the mapped external volume.
2. Perform all necessary operations for powering off the local system.
3. Turn off the power supply of the local storage system.
Data in local cache memory is written in the external volume when the local system is powered
off (all data is destaged).
4. When ready, make sure that the external system is on, and then power on the local system.
Powering off and on both storage systems
Procedure 23 To power off both local and external storage systems
1. Stop read or write I/O to the local storage system, including read and write I/O with Fibre
Channel connections.
2. Check the documentation for any software functions used with the mapped external volume.
For example, if the external volume is used in a Business Copy pair, see the HP XP P9000
Business Copy User Guide.
3. Power off the local storage system.
4. When the power supply of the local system is completely off, power off the external system.
Procedure 24 To power on both local and external storage systems
1. Power on the external system.
2. When the power supply of the external system is completely on, power on the local system.
3. Resume use of the mapped external volume.
4. Start read or write I/O to the local storage system.
All read and write I/Os with Fibre Channel connections can be started.
Powering off and on local, external storage systems 51