Always use Backup to move the media inside an autochanger. If you physically move the media, the autochanger inventory becomes outdated. If this occurs inadvertently, follow these steps:
Reset the autochanger:
# nsrjb -H |
Inventory the autochanger contents:
# nsrjb -I -E |
Refer to Appendix B, Command Line Reference Utilities and the nsrjb man page for details on the nsrjb program.