A job specifies the expression VOL=SER=(VOL1,VOL2) and successfully reads a data set that spans volumes VOL1 and VOL2.
VOL1 is recorded in the Media Database as a single active volume; VOL2 is marked as a scratch volume; and Control-M/Tape is not aware that the data set continues from VOL1 to VOL2.
After the job is run, VOL1 and VOL2 are chained in a group in the Media Database, where VOL1 is the first volume and has a volume sequence number of 1, and VOL2 is the second volume and has a volume sequence number of 2.