Win svr sbs sp2 2003, dell pv-100t - dat72 tape drive, vertias drivers, Backup exec 10d for windows servers sbs suite ver: 10.1, rev. 5629. No av scans during backup job, job is set to append to media, overwrite if no appendable media is availble.  it is only bkin up 23gbs of data, Not sure what to do at this point as sometimes not all the time i have to put in another tape for it to finish a job.