Try running a cleaning process and that can tell you.
If the cleaning cartridge is not a valid cleaning cartridge or if there is no cleaning cartridghe , the LCD screen will display Invalid Tape and the cartridge will be exported or will say no tape.
To clean the tape drive:
From the Home Screen, press Previous or Next until the screen displays Operations. Press Enter to select.
Press Previous or Next until the screen displays Clean Drive . Press Enter to select.
Use Previous or Next until the screen displays either Drive 1 , or Drive 2 . The second line can display either Clean Required or Good for both drives. Select the drive for Clean Required .
When the screen displays the correct drive, press Enter . The screen will display either Cleaning Tape Slot 4 or Cleaning Tape slot XX , where XX represents flashing blocks. If a slot number is displayed, the tape in that slot has a bar code label identifying the tape as a cleaning tape. If a slot is displayed, continue to Step 6 . If no slot number is displayed, it indicates that the library is not able to detect that a cleaning tape with a bar code is in the library. In this case, the operator must select the slot where a cleaning tape resides.
Use Previous or Next to display the location of a cleaning tape.
When the correct location for the cleaning tape is displayed, press Enter to select. While the library is cleaning the drive, Cleaning Drive 1 in progress or Cleaning Drive 2 in progress will be displayed.
After the cleaning is complete, the screen will either display Cleaning Drive 1 Complete , or Cleaning Drive 1 Failed . If the cleaning failed, press Enter to display the error code and message explaining the failure.
The library will return the cleaning cartridge to the original slot. If the cartridge is loaded from the front panel, it should be unloaded from that slot now either by using the mailslot, or by removing the left magazine. When the tape drive cleaning is complete, the Clean drive LED turns off (if previously on).
