In the manual for this Storage Works drive it says on page 33 NOT TO USE VERIFY because DDS does read-after-writing checking automatically (in the context of getting most out of media. Certainly not a necessity.)
The Backup wizard in SBS Server manager does not give the option to turn off verify, although my assumtion is that I can set it up manually this way (or go into scheduled task and just remove the verify switch).
Do I want to do this? It makes sense that the tape would last longer naturally, but I'm not willing to turn that off for that reason alone.