Nice General Linux RAID 1 Guide

Full examples/tutorials that should work for any Linux system using GRUB or LILO as the boot loader.

This is the only tutorial I've seen that clearly shows how you can convert an existing non-RAID system to software RAID1 remotely, without ever having to be at the computer. This is important for people who co-locate or rent dedicated servers that they may not have physical access to in a timely manner.

https://alioth.debian.org/project/showfiles.php?group_id=30283&release_id=288