Changing a Primary Mirrored Logical Drive to a Secondary Logical Drive
Use the Change Role to Secondary option to perform a between the two paired in . This option demotes a selected to become the of the mirrored pair. If the associated secondary logical drive can be contacted, the secondary logical drive is automatically
promoted to be the primary logical drive.
Use this option for role reversals during normal operating conditions. You can also use this option during a Recovery Guru
procedure for a .
Keep these guidelines in mind:
If the selected primary logical drive has associated , demoting this logical drive to a secondary role will cause the associated flashcopy logical drives to fail only if the remote logical drive mirror was created on the of an existing flashcopy logical drive.
Any that are accessing the primary logical drive through a will have read-only access to the logical drive. When the primary logical drive becomes a secondary logical drive, only initiated by the primary will be written to the logical drive.
If a communication problem between the primary site and secondary site prevents the promotion of the secondary logical drive,
an error message appears. However, you can still demote the primary logical drive. This demotion leads to a . Refer to the Forcing a Primary Logical Drive to Change to a Secondary Logical Drive online help topic.
Note:
This option is not available unless the Enhanced Remote Mirroring has been activated.
In the Logical pane, select the primary logical drive, and select Logical Drive >> Enhanced Remote Mirroring >> Change >> Role to Secondary.
Click Yes.
The primary logical drive is demoted to be the secondary logical drive in the remote logical drive mirror. If the associated
secondary logical drive can be contacted, the secondary logical drive is automatically promoted to be the primary logical
drive in the remote logical drive.