OT: USB booting the (k)ubuntu Live-CD

[Derek Broughton]

On Wednesday 25 May 2005 10:10, Fabien Meghazi wrote:
> > If I accidentally try to boot with the drive connected to my new laptop,
> > it starts grub on the USB drive.  It then fails because grub was
> > configured to boot off /dev/hda and the partition is on /dev/sdb (or
> > possibly /dev/sdc).  I think if I just modified the grub configuration I
> > could get it to boot.  If you don't get a better answer today, I'll see
> > if I can give it a try tonight.
>
> Ok I see, but it seems that in this case we have to know what is the root
> partition before booting. I wonder if there is a way to have grub
> dynamically choose the root partition.
>
> Eg: we have a drive with grub on the mbr and 3 partition on this
> drive, let's say
> that the system is on the 3rd partition, that would be great if we
> could say to grub's
> menu.lst to use the 3rd partition of the current device it is running on,
> so, by example,  if the bios was asked to boot on usb and it started to
> boot using /dev/sdb grub would automatically call the kernel
> with root=/dev/sdb3 parameter

It needs to know where to find menu.lst, first...  

I really don't think it's that big a deal. If you want to boot off usb, you're 
well advised to have only _one_ device connected as you boot, so plug in the 
memory stick or USB drive and it should always come up with the same ID.  In 
my case, it could have been sdb or sdc depending on whether I had both my 
drive and my memory stick connected, and which was inserted first.
-- 
derek