FreeBSD HOWTO: Software Mirror System Disk
Danny Howard
dannyman at toldme.com
Mon Jan 24 12:25:01 PST 2005
Danny Howard wrote:
> As the documentation is a bit sketchy, here’s a quick cheat sheet for
> setting this up with gmirror:
> (This crib sheet assumes you have a pair of identical IDE (in my case,
> SATA) drives identified as ad4 and ad6.)
Let me apologize for Thunderbird formatting my mail goofy. (I only use
it for mailing lists, silly vim weenie.) Here's a little clean-up:
1. Install FreeBSD on to ad4.
2. Reboot with the Install CD.
3. Enter Fixit mode, using Install CD disc2 as the “live filesystem”
4. # chroot /dist
# mount_devfs devfs /dev
# gmirror label -v -b round-robin gm0 /dev/ad4
# gmirror insert gm0 /dev/ad6
# mount /dev/mirror/gm0s1a /mnt
# echo ‘geom_mirror_load="YES"‘ >> /mnt/boot/loader.conf
# echo ’swapoff="YES"‘ >> /mnt/etc/rc.conf
5. Edit /mnt/etc/fstab to convert ad4 -> mirror/gm0
6. Reboot
-danny
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