Setting Up The Differential Management Lu (Dmlu) - Hitachi AMS2100 User Manual

Setting up the Differential Management LU (DMLU)

Hitachi AMS 2000 Family Copy-on-Write SnapShot User Guide
The DMLU is an exclusive volume used for storing SnapShot
information when the array is powered down. You must set up the
DMLU before using SnapShot.
Prerequisites
• The DMLU must be set at a minimum size of 10 GB.
• Though only one DMLU is needed, two are recommended, with
the second used as a backup.
• For RAID considerations, see the bullet on DMLU in
configuration for LUs assigned to SnapShot on page
• Also see Appendix A,
To set up a DMLU
(For instructions using CLI, see
1. In the navigation tree, select Settings, then DMLU. The
Differential Management Logical Units screen displays.
2. Click Add DMLU. The Add DMLU screen displays, as shown in
Figure 5-1.
•
Figure 5-1: Add DMLU Screen
3. Select the LUNs that you want to assign as DMLUs, and then click
OK. A confirmation message displays.
4. Select the Yes, I have read... check box, then click Confirm.
When a success message displays, click Close.
Configuring SnapShot
Specifications.
Setting the DMLU on page
RAID
2-10.
B-10.)
5-5