Change Controlling Cm - Fujitsu ETERNUS DX60 S3 User Manual

Chapter 5 RAID Group Management

5.4 Change Controlling CM

5.4

Change Controlling CM

This function changes the Controlling CM that is allocated to the RAID group.
Unequal loading between the CMs can be resolved by changing the Controlling CM.
• While changing the Controlling CM, the storage system status is changed from Write Back mode to Write
Through mode, reducing the I/O performance for the ETERNUS DX. Perform this function when there are
not many I/O operations. Changing the Controlling CM may take up to 20 or 30 minutes.
• The Controlling CM of a RAID group cannot be changed if it configures an FTRP.
• The Controlling CM of a RAID group cannot be changed if it is registered as an EXCP.
• This function cannot be used under the following conditions:
- A CM that is not in "
- Formatting or LUN Concatenation is being performed in the volumes that are registered in the target
RAID group
- Encryption is being performed in the target RAID group
- The target RAID group status is not "
- The rebuild, copyback, or redundant copy is being performed in the target RAID group
- LDE is being performed in the ETERNUS DX
- The RAID migration is being performed in the ETERNUS DX
- The RAID group diagnosis is being performed in the ETERNUS DX
- The disk diagnosis is being performed in the ETERNUS DX
- The TPV balancing is being performed in the ETERNUS DX
- The FTRP balancing is being performed in the ETERNUS DX
- Pinned data exists in the ETERNUS DX
This function can also be used for changing the Controlling CM of the RAID groups that configure a Thin
Provisioning Pool (TPP).
For details on the parameters for this function, refer to
For the factory default settings for this function, refer to
The procedure to change Controlling CM of the RAID group is as follows:
Procedure
1
Select the RAID group to change the Controlling CM (multiple selections can be made) and
click [Change Controlling CM] in [Action].
Normal" status exists
Available"
538
ETERNUS Web GUI User's Guide (Settings)
Copyright 2015 FUJITSU LIMITED
"A.5.3 Change Controlling CM" (page
"Appendix B Change Controlling CM" (page
915).
1004).
P2X0-1270-13ENZ0