Informix Database Backup Error

Hi Guys,

I am not able to perform a level 0 backup on our informix database because I keep getting these error messages:

function write to tape failed code -1 errno 6
function could not write archive tape. failed code -1 errno 6
function put arc data failed code -1 errno 6
Archive failed - function write to tape failed code -1 errno 6

Please help in troubleshooting this one out. Bec we really need to perform a full backup on the system.

Thanks!

Chris