Notice: STP:SCSI tape 0 device 46/0 offline

My tape drive is not backing up my data. This is the message that comes up as the computer starts up each morning. Notice Stp:SCSI tape 0 device 46/0 offline. The computer is equipped with a Seagate STD 24000N internal tape drive and the green indicator light on it continuously is on but the amber light is flashing. This problem has come up before as indicated by search of previous postings on this site by other users. Is there any way with either commands as the programmer or someone who has had previous experience with this problem to determine if the drive just needs cleaning or if there is a software glitck or if the tape drive is shot. Any help appreciated. Thanks.