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

    Save sets

    When you save files with BACKUP Manager, the files are written to a
    single, special file called a save set.

    Save set names on tape can have up to 17 characters, including the
    period delimiter (.) and file type; save set names on disk can have
    up to 53 characters, including the period delimiter (.) and file
    type. (Note: BACKUP Manager allows you to enter file names of only up
    to 53 characters.)  The following example is a valid save set
    specification:

       WKLY27JUN1994.BCK

    Do not specify a directory name for the save set; save sets use the
    [000000] directory.