HP StorageWorks XP Remote Web Console Software - Manual (Page 46)

46 Managing cache with external storage
Determining if the cache mode is disabled
If you have an existing configuration and need to determine if your external LUs are configured with cache
mode disabled, follow this procedure:
1. In the XP Remote Web Console main pane, click the External Storage button in the left pane. The LU
Operation pane appears.
2. In the Device tree, select an external device group.
3. In the Device list, check the Cache Mode setting ( Figure 19 ). If cache mode is enabled, you should
change it to Disabled.
Figure 19 LU Operation pane, Cache Mode setting
Changing the cache mode
If you need to change the cache mode for existing external LUs, you must delete and remap the external LU
path and definition.
CAUTION: Before you delete any LUs that you want to remap, carefully record necessary configuration
information. If you remap existing LUs with changed configuration settings (other than cache mode), you
can lose access to the LUs and the data they contain.
Collecting device information
Before you remap an external storage device, collect the following information for each device:
• LU number in the group
• Universal Unique ID (UUID)
• Path settings
• CVS settings
• Mapped location
• External group number
• CU:LDEV identifier
To collect each of these items: