Chapter 5 Configuration Menu
> 5.2 RAID Management
ETERNUS DX400/DX8000 series ETERNUSmgr User Guide Settings/Maintenance
154 Copyright 2010 FUJITSU LIMITED
P2X0-0760-02ENZ0
This section describes procedures to change controlling CMs for RAID Groups.
Procedure
1Click [Change Controlling CM of RAID Group] under the RAID Management (or

Thin Provisioning Management) in the [Configuration] menu.

The [Change Controlling CM of RAID Group (Initial)] screen appears.
2Select the change setting mode as either [Automatic Allocation] or [Individual

Selection], and click the [Set] button.

When [Automatic Allocation] is selected:
If [Automatic Allocation] is selected, the controlling CM-CPU is changed automatically. All
the RAID Groups are targets for [Automatic Allocation]. It is n o t n ec e s s ar y t o s el e c t t h e
controlling CM-CPU for each RAID Group from the list box. [Automatic Allocation] assigns
the same CM-CPU as when "Auto" is specified for the controlling CM-CPU in [Create
RAID Group] menu. Refer to "5.2.1 Create RAID Group" (page 144) for details.
In the following cases, the controlling CM cannot be changed.
-When the Bind in Cache memory is already specified
-When no RAID Group is registered in the ETERNUS DX400/DX8000
series
-When LDE is in progress
-When there is Pinned data
-When RAID Migration is in progress
-When balancing TPV is in progress
-When a REC Buffer whose usage is not "Unused" is registered
Controlling CM for the RAID group in the following status cannot be
changed.
-When the RAID group status is not "Available"
-When the RAID group is blocked
-When there is a volume that is being encrypted
-When there is a volume that is being formatted
While the controlling CM is being changed, the device mode changes
from "Write Back" to "Write Through". When using the [Change
Controlling CM of RAID Group] menu, be sure to consider the workload.
When Resource Domains are registered in the ETERNUS DX400/
DX8000 series, the RAID Groups that can change the controlling CM
differ depending on the current user account.
-When logged on using a Total Administrator account, controlling
CMs of all the RAID Groups that are assigned to Resource Domains
can be changed.
-When logged on using a Resource Domain Administrator account,
only the controlling C M for RAID Grou ps that are assigned to the
relevant Resource Domain, and only the controlling CM for RAID
Groups that are assigned to the Shared Resource, can be changed.