This article is for Amanda Enterprise (AE)
Error Message
taper: fatal changer error: slot 4: mtx: Request Sense: Long Report=yes taper: changer problem: no slots available
Error Description
This type of error occurs due to some tape SCSI errors
Solution
At this time if you do see any scsi tape errors in the /var/log/messages or in the dmesg output, then please go ahead and address these.
This will eliminate the possibility of hardware errors.