Dell POWERVAULT MD3600F Owner's Manual page 203

The write mode of a remote replication is selected when it is created.
However, you can change the write mode in a remote replication at a later
time, as well as change the secondary virtual disk's membership in a write
consistency group. For more information about write modes and write
consistency groups, go to Setting the Write Mode for Creating a Remote
Replication online help topic.
To change Write Mode and Consistency Group Membership:
1 In the AMW the storage array containing the primary virtual disk, select
the Logical tab.
2 In the Logical pane, right-click the primary virtual disk of the replicated pair.
3 Select ChangeWrite Mode.
The Change Write Mode dialog is displayed. The Replicated pairs table
reflects all replicated pairs in both the local and remote storage arrays.
4 Select one or more replicated pairs. To select all replicated pairs, click
Select All.
5 Select either the Synchronous or Asynchronous write mode.
6 If you are you adding the secondary virtual disk of the replicated pair to a
write consistency group, select Yes and then select the Add to consistency
group check box.
If you are not adding the secondary virtual disk of the replicated pair to a
write consistency group, go to Step 7.
7 Click OK.
The Change Write Mode confirmation message is displayed.
8 In the Change Write Mode confirmation message, click Yes.
The Replication properties section (the Properties panes in the Array
Management Window for the local storage array) displays the
following information:
• Replication status is Synchronized.
• Write mode is either Synchronous or Asynchronous, depending on your
selection above.
• The secondary virtual disk is either write consistent/not write consistent.
• Resynchronization method is either Manual or Automatic.
Configuration: Premium Feature— Remote Replication
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