Chapter 11. Advanced Copy Services 547
11.7.11  Starting Metro Mirror/Global Mirror consistency group
Use the startrcconsistgrp command to start an MM/GM consistency group. You can issue 
this command only to a consistency group that is connected.
For a consistency group that is idling, this command assigns a copy direction (master and 
auxiliary roles) and begins the copy process. Otherwise, this command restarts a previous 
copy process that was stopped by a stop command or by an I/O error.
11.7.12  Stopping Metro Mirror/Global Mirror consistency group
Use the stoprcconsistgrp command to stop the copy process for an MM/GM consistency 
group. You can also use this command to enable write access to the auxiliary volumes in the 
group if the group is in a consistent state.
If the consistency group is in an inconsistent state, any copy operation stops and does not 
resume until you issue the startrcconsistgrp command. Write activity is no longer copied 
from the master to the auxiliary volumes that belong to the relationships in the group. For a 
consistency group in the ConsistentSynchronized state, this command causes a Consistency 
Freeze.
When a consistency group is in a consistent state (for example, in the ConsistentStopped, 
ConsistentSynchronized, or ConsistentDisconnected state), you can use the -access 
parameter with the stoprcconsistgrp command to enable write access to the auxiliary 
volumes within that group.
11.7.13  Deleting Metro Mirror/Global Mirror relationship
Use the rmrcrelationship command to delete the relationship that is specified. Deleting a 
relationship deletes only the logical relationship between the two volumes. It does not affect 
the volumes themselves.
If the relationship is disconnected at the time that the command is issued, the relationship is 
deleted only on the system on which the command is being run. When the systems 
reconnect, the relationship is automatically deleted on the other system.
Alternatively, if the systems are disconnected and you still want to remove the relationship on 
both systems, you can issue the rmrcrelationship command independently on both of the 
systems.
A relationship cannot be deleted if it is part of a consistency group. You must first remove the 
relationship from the consistency group.
If you delete an inconsistent relationship, the auxiliary volume becomes accessible even 
though it is still inconsistent. This situation is the one case in which MM/GM does not inhibit 
access to inconsistent data.
11.7.14  Deleting Metro Mirror/Global Mirror consistency group
Use the rmrcconsistgrp command to delete an MM/GM consistency group. This command 
deletes the specified consistency group.