[TriLUG] grub problems booting ubuntu from USB stick

[Tim Jowers]

FWIW, you can also make a grub boot CD and more tightly control what disk is
being hit. That is, you have to do it this was for old (circa 2003 for sure)
hardware as the USB cannot become the first boot disk as far as their old
BIOS thinks.

I also found drastic differences in thumb drive performance. E.g. Lexar
good. Some others bad: they'll timeout on getting files from ext2 or ext3 so
you'll beat yourself silly trying to get an install that will boot every
time.

TimJowers


On Mon, Apr 21, 2008 at 4:03 PM, Joseph Mack NA3T <jmack at wm7d.net> wrote:

> On Mon, 21 Apr 2008, Tom Roche wrote:
>
> >
> > summary: I'm getting
> >
> > > Error 15: File not found
>
> the location of the disk/file is known to the BIOS, but
> won't neccessarily be where the kernel will see it, after
> the kernel has booted.
>
> go into grub edit mode attacking each line of your grub.conf
> paragraph. Use the tab key to see what grub knows about at
> each stage eg start with
>
> kernel (hd
>
> and tab from there. This will tell you if the BIOS knows the
> USB stick as hd?
>
> Eventually you'll get a kernel that boots. However you don't
> know where root is at this stage and you'll get a kernel
> panic when it can't mount the root partition. Start guessing
> again.
>
> Joe
> --
> Joseph Mack NA3T EME(B,D), FM05lw North Carolina
> jmack (at) wm7d (dot) net - azimuthal equidistant map
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