CMMVC9443E The command failed because the volume is part of a Remote Copy consistency group.
Explanation
This error can occur when an attempt is made to change the size of a HyperSwap® volume while the volume is part of a remote copy consistency group.
User response
Remove the active-active relationship for the volume from the remote copy consistency group, and then retry the command. The active-active relationship can be added back to the consistency group after the volume is expanded.