I have a client with a new Dell PowerEdge 2950. The sever has 2 x 73GB drive and 4 x 300Gb drives. I have read all the post and articles, but am still struggling with the best drive/partition setup. The server will host about 150 users, once we import all the mail we figure to be using about 70GB. I don't think doing 3 mirrored sets will work, because we lose to much disk space.