Is the device disabled in Veeam?  Check the properties of the drive to ensure it is enabled.  Other than that it should work since it shows in Windows correctly.

Seems to be working correctly from the Device Manager! What is the log saying?

No need to really check the logs as that symbol from what I know means disabled.  I have seen it on our tape services but we had to disable the drive cause it was faulty.

I checked and the drive is enabled. it’s strange that the sign means disabled 

Typically that is what I have seen. Maybe try reacanning the library to see if it picks up properly if already enabled.  Otherwise you might need to check logs or open a case.

I've seen a similar issue with the MSL3040 but unfortunately don't remember what was causing it. Both drives on your screenshot have the same tape ID and that's why one is disabled.

Did you have to replace a drive recently?

Have you tried to restart library and the Veeam/Tape Server?

Also, is there anything unusual shown in the MSL's web management?

Hi everyone, 

After doing some troubleshooting, we discovered that one of the drives was using an outdated firmware. we upgraded that and voila! it is now working perfectly. 

Thanks a lot for taking the time to look into our issue. This community has been very helpful and positive!

Glad to hear you were able to resolve it and it was something simple.