HP XP External Storage Software - Manual (Page 127)

• Whether the LU is part of a LUSE. When it constitutes a part of a LUSE, the cache mode setting
should be same among all LUs which constitute the LUSE LU.
Whether the bind mode of a Cache LUN is set. When bind mode is set, you cannot change the
cache mode from Enable to Disable. To change the cache mode to Disable, first cancel the setting
for Cache LUN XP or change the cache residency mode to the priority mode.
• Whether the IO Suppression mode is set to Disable. When the IO Suppression mode is set to
Enable, you cannot change the cache mode from Disable to Enable.
Whether the volume is not a remote command device. When the volume is a remote command
device, you cannot change the cache mode from Disable to Enable.
Changing the cache mode of all external LUs in an external
array
The procedure to change the cache mode of all external volumes in an external subsystem is as follows:
1. Log on to Remote Web Console.
2.
Click the External Storage XP icon ( ) on the Remote Web Console main pane. The
External Storage XP pane (LU Operation pane) is displayed.
3. Change the session to Modify mode by clicking the modify icon. For the procedure to change
the operation mode to Modify mode, please refer to the HP StorageWorks XP Remote Web
Console user guide.
4. Click the LU Operation tab. The LU Operation pane is displayed.
5. Click External Devices in the Device tree. The connected external arrays are displayed in the
Device list.
6. Click the array whose cache mode you want to change in the Device list, right-click to select the
Change Cache Mode command, and then select Enable or Disable. The selected array is displayed
in blue and italics in the Device tree and Device list. The contents of the selected array are
displayed in the Preset list. To check the details of the selected array, select an item from the
Preset list and right-click to select the Detail command. To cancel the setting, click the item in the
Preset list, and right-click to select the Delete command.
7. Click Apply on the LU Operation pane. A message asking if you want to apply the settings to
the array is displayed.
8. Select OK to close the message. The cache mode settings in the Preset list are applied to the
array. When an error occurs during the cache mode change of the external LU, the failed setting
is displayed in the Preset list, and an error code is displayed. To check the error message, select
the failed setting and right-click to select the Detail command.
Changing the cache mode of an individual external LU
The procedure to change the cache mode of an individual external LU is as follows:
1. Log on to the Remote Web Console.
2.
Click the button with the External Storage XP icon ( ) on the Remote Web Console
main pane. The External Storage pane (LU Operation pane) is displayed.
3. Change the session to Modify. For the procedure to change the operation mode to Modify mode,
please refer to the HP StorageWorks XP Remote Web Console user guide.
External Storage XP user guide for the XP12000, XP10000, SVS200 127