Matt wrote: > Does anyone know of a howto on setting up raid1 on CentOS 5.x 64 bit? > There's at tutorial for RAID 1 on FC-8 here: http://www.howtoforge.com/software-raid1-grub-boot-fedora-8 The adjustments for CentOS are minimal but since you are presumably not yet on a first-name basis with md, I suggest that you make a "dry run" first, determining at each step if the command specified exists in CentOS, if the devices match your hardware, etc. Most of all, you should back up your data before proceeding.