Re: Building a boot disk with initrd
On Wed, 15 Jun 2005, Diesis wrote:
> I'm stuck with this...
> I have a Debian Woody system with root on raid, and I wish to upgrade it.
> First of all, I wish to build a set of boot floppies that could be used
> for booting and restart the complete system without troubles.
if it is truly a working raid .. it will boot from either disks...
and a 3rd boot media ( floppy ) is not needed ???
- pull each disk out, one at a time and see if it boots and
if it doesn't booot, you do NOT have properly configured raid
- you can also use any arbitrary standalone boot cd from any
and all vendors w/ raid support on the cd to boot into your raid
> I've tried
> # mkboot /dev/fd0
that makes a boot floppy ...
boot floppies does not need initrd
standalone boot floppy does need initrd .. ( things that run in memory,
and you dont need a hard disk or cf or cdrom etc )
> Is there a smart and working way to build a two-three set disk like i
> did with mkbootdisk under other systems ?
bad idea... you're making things 1000x more complicated than it needs
to be for your boot floppy
- in your case, you need to know if raid support is in the kernel or
- if it is as modules .. you will have to decide, which problem
is easier to fix ... fix the kernel or fix your boot floppy
- kernel is 100x easier to fix, by building raid into the
- next simple way ..
change boot=/dev/hda to boot=/dev/fd0
you probably will need to create a bootable media first
and go thru some additional steps
- if neither lilo nor grub works ... than you have to do more homework as
- understand when /boot is required and when it is not
remove /boot and see if you "panic, why would i do that"
your boot floppy, boot cd, boot cf, etc will NOT have
the boot media ( fd, cd, cf, network ) just has MBR info
and not /vmlinuz nor /initrd.gz
/boot ( aka initrd for your problems ) will exists on say
the hard disk
build a minimal custom linux that runs in /dev/ram
and no other directories like /boot /bin /etc /sbin in
anything other than in your initrd.gz
- understand when initrd is required and when it is not
initrd is NOT required if your kernel has everything
built into it and is NOT modules that are required to boot