"This guide explains how to set up software RAID1 on an already
running Debian Etch system. The GRUB bootloader will be configured
in such a way that the system will still be able to boot if one of
the hard drives fails (no matter which one)...
"In this tutorial I'm using a Debian Etch system with two hard
drives, /dev/sda and /dev/sdb which are identical in size..."