Explanation: BACKUPVOLUME is a required parameter you specify to request a list of selected information from backup volume entries contained in the BCDS.
BACKUPVOLUME specifies that you want a list of all backup volumes.
For volser, substitute the serial number of the specific backup volume you want listed.
Defaults: If you specify BACKUPVOLUME without (volser), DFSMShsm lists all backup volume entries contained in the BCDS.