IBM TOTAL STORAGE DS8000 - Manual (Page 295)

v A start or resume Global Mirror command with no modify options is being issued
to a storage image on which a master process is running.
v A start or resume Global Mirror command with modify options is being issued,
but the parameters do not match the existing configuration.
v A start or resume Global Mirror command with modify options is being issued,
but the master process is not paused.
Action
Ensure that the master process is not running and that the parameters match.
Resubmit the task.
CMUN03029E SOURCE Copy Services operation failure: invalid
failback primary
Explanation
The specified failback primary does not match the existing primary for the volume.
Action
Specify the correct primary, and then resubmit the task.
CMUN03030E SOURCE Copy Services operation failure: failback
primary volume not suspended
Explanation
The Remote Mirror and Copy failback primary volume must be suspended before
the task is issued.
Action
Suspend the failback primary volume, and then resubmit the task.
CMUN03031E SOURCE Copy Services operation failure: invalid
failover primary site
Explanation
The specified failover primary site does not match the existing primary site for the
volume.
Action
Specify the correct failover primary site, and then resubmit the task.
Chapter 7. DS storage management console server messages 275