I have a PV110T DLT1 drive that has recently stopped performing backups.  The clean/media light was blinking, so I inserted a cleaning tape, but this was ejected only a few moments later apparently without cleaning the drive since the light remained on.  I tried a fresh cleaning tape, but the same thing happened.  Also, the drive will not mount any media.  The Veritas Backup Exec 8.5 software hangs up on all backup jobs before eventually reporting the tape as bad media.  The same thing happens with a brand new Dell DLTape IV.  Any suggestions?