Hi All I am pretty much confused about the raid configuration and disk space requirement for exchange 2007. We will be having 200 users and we are planning to give 500 MB space per mailbox. What should be the raid configuration for exchange server like where should be the OS, logs, database and etc ... and keeping the users in new what should be the disk space we would required. We would want to implement RAID-5 with 3 drives. Please help in this scenario. Regards

I would start here:http://msexchangeteam.com/archive/2007/01/15/432207.aspxExchange 2007 Mailbox Server Role Storage Requirements Calculator The general rule of thumb is to separate the logs from the database for performance and recoverability.RAID 10 is typically recommened versus RAID 5 because of the higher performance hit RAID 5 requires, but with 200 users, depending on their profile, RAID 5 should work.