- 1). Partition your hard drive into three parts.
- 2). Install the OS to hd0, move it over to hd1, and mirror it to hd2.
- 3). Type "grub" from your computer's boot screen for hd 2.
- 4). From within grub type:
grub> device (hd1) /dev/sdy
grub> root (hd1,0)
grub> setup (hd1)
grub> device (hd2) /dev/sdac
grub> root (hd2,0)
grub> setup (hd2)
This makes sure the OS is written to the right drive: - 5). Then type:
title CentOS-4 x86_64 (2.6.9-42.ELsmp)
root (hd1,0)
kernel /vmlinuz-2.6.9-42.ELsmp ro root=/dev/md1 rhgb quiet
initrd /initrd-2.6.9-42.ELsmp.img
This will make sure your computer boots from the right drive.
Source...