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Device status stuck "In Use" in Symantec Backup Exec 12

All of our backup jobs are being missed because on the Devices tab of Bakcup Exec, it shows the "Quantum 3" under Robotic Libraries with a status of in use. All Backup jobs show a status of  "Scheduled", and the display on the Quantum SuperLoader shows Idle. I have tried restarting the Quantum, and tried restarting the Backup Exec Services. When I restarted the services, the device showed offline. As soon as I right clicked the device and clicked "Online" it showed "In Use" again.
2 Solutions
bradl3yAuthor Commented:
Called Symantec Support, seems the media changer and tape were both not showing up in device manager. Right clicking on the computer name and choosing to scan resolved this problem. I am still unsure what the cause of this happening was. If anyone has any insight to why this might have happened, I will aware points, otherwise I will request that this be closed with this comment as the solution.
bradl3yAuthor Commented:
*award points
If it dropped out of device manager I would double check my physical connections.
Hi Bradl3y,

Well at times we would never be able to understand the mystry of devices missing in windows device manager.

the plug and play service checks periodically for any new devices connected and connections to existing devices which ensures communication between the OS and the devices.

The possible reson why in your case the device might have gone fishing is because of some connectivity related issue between the OS hardware and the TAPE devices.

Check the windows event viewer in the system section for any hardware communication failures. You might need to check the events from the time you noticed the "in use" and the last time it worked.

also check if there was any library activity i.e. loading or unloading of tapes directly from the tape unit instead of from the backup exec interface.

you can post back if you have any further queries.

Richard WyattCommented:
D'oh! Or, your 16 LTO autoloader had 17 cartridges loaded, names have been withheld...
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