When bar code reading is enabled through the SCO ARCserve/Open Device Manager, the autochanger scans for labels on each loaded cartridge tape. When a new bar code label is encountered, the corresponding tape is inserted in the tape drive and the label and the tape's volume header are read.
This information is then stored in files in the bar code tape database directory, /usr/lib/ARCserve/tapedb. A separate file is created for each unique tape label that is read.
If the changer scans a tape label that has already been encountered, the tape information is extracted from the database, saving the need to insert the tape into the tape drive.
It you do not use the changer-specific Device Management menu in this case, the tape database is not updated to reflect the new state of the tape.
In addition, it is recommended that you only remove tapes from the changer using the changer-specific Device Management menu, so that the tapes' information is properly removed from the tape database.