Re: linux software RAID with hot-swap hardware
Russell Coker wrote:
> > > raid-extra-boot="/dev/sda,/dev/sdb"
> > >
> > > According to the documentation of lilo, this shouldn't be necessary,
> > > but apparently either the funcionality or the docs are buggy. Without
> > > that line I couldn't boot at all from the second disk,
> > the way I've tested it also works with
> > install-mbr /dev/md1
> Why would you want to use install-mbr on a RAID device?
> I use install-mbr for the MBR on the hard drive (/dev/sda and /dev/sdb in
> this case) and then have it load the real boot block from /dev/md1 which
> was created by LILO.
In my experience a lilo.conf such as this works:
Simply run lilo thereafter, you will see that it automatically installs boot
sectors in both drives. Like this:
boot = /dev/hda, map = /boot/map.0301
Added Linux *
boot = /dev/hdc, map = /boot/map.1601
Added Linux *
The above is from a Redhat 7.3 system but this worked back in Redhat 6.2, I
have also done this with a sid system within the past month.
In the above case /dev/md1 is a 24MB partition mounted as /boot, consisting of
/dev/hda1 and /dev/hdb1. Since lilo is supposed to get past the 1024
cylinder limit these days that is probably not relevant.
In testing I was able to boot with hda only (that one's obvious), I was able
to boot with hdc only (both directly using BIOS and using lilo installed on
I'm 90% sure that I physically moved hdc so that it became hda and was able to
boot perfectly but it was getting late and I lost track of what I was
All partition types are set to RAID Autodetect (FD), I believe that may be