1) Right-click on the tape library and pause/unpause the library.
2) In the Windows Device Manager, check that the library is appearing as an Unknown Medium Changer with a Microsoft driver. If it has a Quantum driver, change it using these procedures.
How to uninstall the Original Equipment Manufacturer driver for the medium changer in a robotic library so as to make it "Unknown medium changer"
How to uninstall the Original Equipment Manufacturer driver for the medium changer in a robotic library so as to make it "Unknown medium changer" on Windows 2008 Server.
The tape drive should have a Symantec driver.
3) If both the above do not solve the problem, re-install the tape drive using this procedure
a) Delete the library from BE
b) Stop the media server and the library
c) Start the tape library
d) Start the media server
e) Ensure that the library and tape drive is recognised and functioning correctly in the Windows Device Manager
f) In BE, install the library if necessary. Go to Tools --> Wizards ---> Device Configuration Wizard to do so.
g) Try again.
