Here what I have. 2 Dell poweredge servers (500mhz 512 ram) with autoloaders. (kick *** servers btw) And another compaq server thats decent (300mhz 256 ram) with lots of hd space and an external tape backup unit. All servers have raid 5. Here are the requirements:
1. Have a Primary domain controller
2. Have a backup domain controller
3. Backup all three servers nightly
4. Run microsoft exchange
5. Run microsoft SQL (2 databases)
6. A file server for home dir and stuff
7. Need fire wall protection (a cisco pix is what I had in mind so the servers aren't sitting on the net)
8. Make as much as possible redundant.
Any ideas how I should set this up.