Specify a volser prefix in the EXTRNVOL Control-M/Tape installation parameter to enable automatic generation of volsers in the External Volume Check-In screen.
Estimate the number of external tapes the data center receives and retains to determine the length of the prefix that should be specified (for example, a three character prefix allows a range of up to 999 volumes).
Choose a naming convention for external volumes if the automatic generation of volsers is not activated (that is, no value is specified for the EXTRNVOL parameter).
