You ejected the tape using the mt offline command. Instead, use mt rewind and eject the tape using the button on the tape drive. This method did not mangle the tape in any of the 3 other tests. Once a week, the home backups are copied to Exabyte. Once a month, all system backups are copied to Exabyte.
Data systems are never copied to exabyte.
Now is a bad time to ask yourself when you last went to church. It can be done by yourself, but best to see Eric Tittley since there are a few details missing, particularly concerning the incremental backup system. Note, you need the complete path to the file. If you are at a location that does not support ssh , then log in to your UMBC account on umbc7 or whatever. From there, you may use ssh to get into the JCA computers.