CMMVC6572E The command has failed because the I/O group that manages the volume that you specified is not stable.

Explanation
The unstable I/O group condition is typically transient,
and usually occurs during I/O group failover or fail back processing.

User response
Use the movevdisk command to change the I/O group with which this volume is
associated to recovery I/O group, and resubmit the command.