Chapter 10. Copy services 593
10.9.12 Stopping Metro Mirror/Global Mirror consistency group
Use the startrcconsistgrp 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.
10.9.13 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.
10.9.14 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. You can issue this command for any existing
consistency group.
If the consistency group is disconnected at the time that the command is issued, the
consistency group is deleted only on the system on which the command is being run. When
the systems reconnect, the consistency group is automatically deleted on the other system.
Alternatively, if the systems are disconnected and you still want to remove the consistency
group on both systems, you can issue the rmrcconsistgrp command separately on both of
the systems.
If the consistency group is not empty, the relationships within it are removed from the
consistency group before the group is deleted. These relationships then become stand-alone
relationships. The state of these relationships is not changed by the action of removing them
from the consistency group.
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