Basic Dedicated E-Comm. Backup is a premium to have and many people feel that it's just not worth it. But, if you have data that you care about, you should think about how much time you'd spend re-creating it if you accidentally deleted a file or your system crashed before you save a file you were working on. The answer to this will help you figure out if a tape drive makes sense.
Tape drives are slow storage.
There's no getting around this fact, but, on the other hand, tapes can store a lot of information and they're somewhat cheap. Think about what it's worth to you. Most computers don't come with a tape drive as standard equipment. Only get one if you're really going to use it. Some people think they can use a Zip drive or an LS120 for a full system backup.