tar option
 

well well well I finally fix my backup type drive is working sweet, but now a new issue came up, I was doing a backup, now an error came cat: write error: No space left on device. So how could I find how much the type drive can hold and I think there a tar option call tar -l number source to destination

Hear command I was doing the backup cat 2005Nov09Data.tar.bz2 >/dev/st0 &

free disk space: df