Note: This article is replaced with http://https://krypted.com//mac-os-x/enabling-raid-mirrors-redux for Snow Leopard. Do not use these procedures for Snow Leopard or above as they are meant for 10.5 and below. When you get an Xserve or one of the new Mac mini Leopard Server, it will come with the operating system on a single drive. In most cases, you’re likely gonna’ have a second drive in those devices. Most people are hopefully going to want to run a RAID1 on those drives. If so, many will simply choose to insert the disk, reboot and reinstall the operating system, using Disk Utility during the installation process to setup the RAID. But you don’t have to.…