TAPE DRIVE ERROE ON ML370

[joshua_34]

I have a ML 370 with windows 2000 server in stalled on it.I have a DAT 72 tape drive. I was backing up everyday and things was normal.Now, i can't nolonger backup above 30gb. My tape catridge is 72 gb.MY database contain 60 gb. When i backup to 30Gb, it gives a error saying " the wrire file' call failed for device \\.\tape0 with the error 1100(the physical end of the tape has benn reach.my tape has been used foor months.My databse include oracle,sybase,SQL.since the problem began , i have try a new tape but the error still exist.