What exactly is the difference here? We are no longer able to perform a
full backup on a single tape. Which backup means would you guys suggest?

We are running NW6.5, Backup Exec 9.0 for Netware. We have about 62g of
data on the server. Our 36/72 tapes no longer fit the entire backup. Thus,
what is the different between incremental and differential backups? Which
one do you have strong opinions about using?