David, a few questions:
1. Have you ever used your backup server for AC. I don't know how you would back up using Server 2008 Imaging backup in real time. It backs up to a drive which it manages, and must be restored to be able to be used. Typically, you would restore it to the same server. Just missing how you can run AC from the backup?
2. Are you doing incremental backups? How long do they take? How much resources does the backup take?
3. JUST ASKING but why do you back up several times a day. I thought I backed up a lot. You could use a program like Backup Assist and backup SQL files every five minutes with almost no footprint. Also, don't forget about the Volume Shadow Copies which you can use to back up every 15 minutes or so. We set them for one hour. Of course, these are on the drive you are protecting.
