Re: Unable to boot a raw kernel image :??

Denis Vlasenko
2002-12-06T08:59:44Z

On 29 November 2002 11:21, DervishD wrote:
> Hi all :))
>
> A time ago I was able to generate bootable Linux CD's just by
> dd'ing a floppy containing a raw kernel image:
>
> dd if=/dev/fd0 of=eltorito
>
> After that, mkisofsing, toasting and booting. But now, depending
> on the machine, ^^^^^^^^^
^^^^^^^^^^^^^^
Boot CD support is BIOS-dependent AFAIK. Maybe on those machines BIOS
floppy emulation from CD is broken?
OTOH if you can boot, say, 2.2 but not 2.4, that's a counterproof
for my theory.

> I have 'invalid compressed format' errors, or even
> ye olde register dump when the image was damaged :(
>
> Booting directly from the floppy works, but booting with that
> same image from a CD does not :(( I now I can use LILO, or better
> yet, Syslinux or isolinux, but I'm just curious why I cannot boot raw
> image-based CD's anymore.
--
vda