Performing Universal Volume Manager Operations
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Hitachi Universal Storage Platform V/VM Universal Volume Manager User’s Guide
Changing the Cache Mode Setting of the External Volume
You can change the cache mode of the external volume in the Volume
Operation window. To change the cache mode of the external volume, right-
click the external volume, click the
Change Cache Mode
in the pop-up menu,
and then click
Enable
or
Disable
. Data that is not written by the host (for
example, data written by ShadowImage) is asynchronously destaged to the
external storage system regardless of the
Cache Mode
setting.
Check the following before changing the cache mode of the external volume.
•
Whether the volume is not set as a volume which constitutes a part of a
LUSE volume.
When it is set as a volume which constitutes a part of a LUSE volume, the
cache mode setting should be same among all volumes which constitutes a
LUSE volume.
•
Whether the bind mode of Cache Residency Manager is not set.
When the bind mode is set, you cannot change the cache mode from
Enable
to
Disable
. To change the cache mode to
Disable
, cancel the
setting for Cache Residency Manager or change the cache residency mode
to the priority mode.
•
Whether the volume is not registered to a pool.
When a volume is registered to a pool as a pool volume, the cache mode
setting should be the same among all the pool volumes in the pool.
•
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
.
To change the cache mode of the external volume:
1.
Start Storage Navigator, and open the Volume Operation window.
2.
Make sure that Storage Navigator is in
Modify
mode.
3.
Click the path group in the Volume Operation tree.
4.
Right-click the external volume that you want to change in the Volume
Operation list.
5.
Click
Change Cache Mode
in the pop-up menu and click
Enable
or
Disable
in the submenu.
The settings are displayed in blue and italics.
6.
Verify the settings in the Preview dialog box.
7.
Click
Apply
in the Volume Operation window.
The settings are applied to the local storage system and the Volume
Operation window is displayed normally. When an error occurs, an error
message is displayed. Verify the details in the Preview dialog box.