Hi, I'm setting up my own dedicated server to offer my clients hosting and want to get the pricing right. Make sure I make enough to cover the hardware and license costs and ongoing running cost (and possibly a little profit - there's a thought) whilst providing a good deal for my clients. My problem is, apart from having built some large databases I'm not really sure of the performance of my hardware. The server I'm putting it on to is a: Dual Athlon MP 2200+ (ok, I know call me crazy but I allways back the underdog) 2gig RAM 128Meg RAID controller with 6x IBM Ultrastar drives Windows 2003 server The question is, how many databases can this server sensibly support, given that it will also be serving up web pages, dns and mail? I know this is a bit of an unknown quantity given that some bad code could lock it up, but I intend to review as much as the code as possible that goes on to it. Also, what's the best way to configure the disks? I've been told by someone the best option is: 2 disks mirrored for system (OS/etc) with a separate partition for swap space. 4 disks RAID 5 for data What's the benefit of mirroring the 2 disks? Why not just have one big RAID 5 array? Thanks for your help.