The following website can be used to generate barcode tape labels for Ultrium LTO backup libraries.
It supports various media types, such as LTO3, LTO4, and LTO5 and can be printed onto standard Avery label paper.
It may be helpful if you run out of tape labels and desperately need to use the tapes. The only drawback is trimming the printed labels and making sure they’re firmly attached to the tape.
Website: http://tapelabels.librelogiciel.com/