Library /sys$common/syshlp/bkm$help.hlb Tape label  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Tape Label(s) field

    Specify the label of the tape on which the save set will be stored.
    You can specify a tape label of up to six characters.  This field is
    ignored for save sets created on a disk.

    You can enter a comma-separated list of tape labels if you need more
    than one tape; do not use spaces.  If you need more labels during the
    save operation than are supplied, BACKUP Manager generates default
    names by putting sequentially increasing numbers in the last two
    character positions; for example, ACCNTS,ACCN02,ACCN03.