Changing The Cache Mode Setting Of The External Volume - Hitachi MK-96RD626-07 User Manual

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.
Hitachi Universal Storage Platform V/VM Universal Volume Manager User's Guide
Performing Universal Volume Manager Operations 5-41