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Old 06-27-2005, 06:29 PM   #1
Registered: Aug 2003
Location: Edinburgh
Distribution: Server: Gentoo2004; Desktop: Ubuntu
Posts: 720

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RAID 1 on boot/root: LILO error


I'm setting up RAID 1 on my boot and root partitions, using hda and hdc

In order to be redundant, I would like to install my LILO configuration onto the MBR of both my hard drives.

My lill.conf looks like this:


# MBR to install LILO to:
#disk = /dev/md0
boot = /dev/hda #LOOK HERE
map = /boot/.map

install = /boot/boot-menu.b   
delay = 50
vga = 791

# Linux bootable partition config begins
image = /boot/gentoo-2.6.11
        root = /dev/md1
        #root = /devices/discs/disc0/part3
        label = Gentoo
        read-only # read-only for checking
When boot = /dev/hda (as above), I get no errors when running /sbin/lilo. Thus, the MBR is correctly installed on /dev/hda and the computer will boot if hda is plugged in.

However, when I chagne the line and set boot = /dev/hdc, and then run /sbin/lilo, I get an error:

localhost root # lilo
Warning: /dev/hdc is not on the first disk
Warning: The boot sector and map file are on different disks.
Added Gentoo *
Added Windows
What does this mean? I know that it isn't the first disk, but that should not matter.

When I unplug hda and try and boot with just /dev/hdc plugged in, my screen is just filled with "999999999".

Any suggestions?

Old 06-27-2005, 06:33 PM   #2
Registered: Jun 2004
Location: Scotland
Distribution: Anything that'll install...
Posts: 305

Rep: Reputation: 30
When it comes to MBR's, there can be only one, and it can only go on the first sectors of the first disk. No way round it, AFAIK.
Old 06-28-2005, 02:47 AM   #3
Registered: Aug 2003
Location: Edinburgh
Distribution: Server: Gentoo2004; Desktop: Ubuntu
Posts: 720

Original Poster
Rep: Reputation: 30
But I'm sure I've read on sites that you should install LILO/Grub to the MBR for both.

Maybe grub would work better.



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