I just recently transferred to the IT Department in my company and one of the tasks on my plate is to review their backup strategy and make sure it's "good". Although I have a lot of IT experience with previous employers, I've never really been involved with backup and restore much beyond the theory level.
They are performing nightly backups to a 400GB tape and a 1TB USB hard drive. The hard drive is backing up absolutely everything on all five servers. The tape is backing up just the essential stuff: web sites, databases, exchange, departmental shares, users' home folders. Both jobs start at 11:00 PM. The tape finishes around 8:30 AM; the hard drive finishes in the middle of the afternoon.
The selection lists were set up by a third-party company. The IT Manager is questioning whether it is really necessary to back up absolutely everything; for example, do we need to back up the WINNT folder? If a server dies, is the tape backup sufficient to bring it back to life, or do we need more?