The DFSMSrmm EDGINERS utility was not able to read a tape label volser because the format of the label is not supported on this device. No volume serial number was returned from the device sense information.

In the message text:

drive_number

The tape drive number.

volser

The external volume serial number. If you are renaming the volume, DFSMSrmm includes both the current volume serial number and the new volume serial number in the message 'volser,newvolser'.