hi there,,
first of all its an accident that should be avoided,,,well actually seagate is good but if the problem is about the torn off of the tape,,maybe you can change your tape drive,,,actually i have the same problem before but i switch a tapedrive for a TANDBERG DATA tape drive,,its the best in the market and until now i haven't encountered any torn off tapes,,,
--usually the longevity of the tape drive depends on the data that is back up regularly by the server,,so if your system doesnt have big databases ,,,the capacity ,,,lets say a 40 mb tape ,,usually you can use it for about a year,,,it depends on what kind and type of system are you backing up...
goodluck