The shared tape drives control are always on Down state

Hi All,

I have this 2 tape drives that always on state DOWN TLD, even if I repeatly perform "up path". I don't see any H/w failure there (SLConsole) either. Have anyone had the same issue like this? Btw, I'm using Tape Lib SL3000

HP.ULTRIUM5-SCSI.006

HP.ULTRIUM5-SCSI.007

(please see the capture )

Care to share anyone? Thank you