Re: Debian 6 / Grub 2 problem

Yes, the UUID is part of the filesystem. Same filesystem, same UUID. That's
the whole point of uuids.

And who cares how long they are? If you're typing them by hand you're "doing
it wrong" .. learn to cut and paste.


On 16 October 2011 18:54, cr <[email protected]> wrote:

> On Wednesday 07 September 2011 14:29:04 Ross wrote:
> > > I think, for some reason, Grub failed to install  (certainly the second
> > > time, when I was using the Deb6 DVD in 'rescue' mode, I got an error
> > > message to that effect).
> > >
> > > I was going to ask what the Grub file is called, but I guess if it's
> > > installed to the boot sector an 'ls' wouldn't show it up anyway.
> > >
> > > Anyway thanks for the help, I think I might try a Deb6  install on one
> of
> > > my laptops (which don't have vital data on them) and get a 'feel' for
> it
> > > before I attack my big box again.
> >
> > I think you have two MBRs, one on each drive.
> >
> > You could try changing your BIOS disk boot order in CMOS setup if that
> > option is available to see if mbr is on other drive and bootable. As
> > long as you note the original order it should be simple to switch back
> > if it is unsuccessful.
> > You could also try using a Super Grub Disk or similar to boot the mbr
> > from the other drive.
> >
> > Ross.
>
> I think you might be right   :)
>
> After a successful install of Deb 6.0.2.1 Squeeze (32-bit) on my laptop, I
> thought I'd try 6.0.2.1 (AMD64) on the desktop.   And the same thing
> happened
> as with 6.0 previously - an apparently successful install, then it rebooted
> into my old (Lenny) grub menu.
>
> I've got three hard disks, a 40GB Seagate (which I use for Linux distros),
> a
> 160GB Seagate for data, and a 500GB WD SATA for data.   The BIOS sees them
> in
> that order.
>
> And yes, changing my boot sequence in the BIOS found the new Grub2 menu, on
> the 500GB  WD SATA.
>
> Complications persist though -
>
> Debian Lenny sees them as /dev/hda,  /dev/hdc and /dev/sda, whether booted
> from Grub on /hda or Grub2 on sda.
>
> Debian Squeeze, if booted from Grub, sees them as /dev/sda (40GB), /dev/sdb
> (160GB), and /dev/sdc in that order.   If booted from Grub2, it sees them
> as
> /dev/sdb, /dev/sdc and /dev/sda.   I assume Squeeze gets its drive ID's
> from
> Grub.
> This obviously leads to complications in Squeeze with identifying my data
> partitions in /etc/fstab, since it changes according to which Grub I boot
> it
> off.   I was hoping to shun UUID's which look like digital garbage.
> I suppose I shall have to bite the bullet and fill my /etc/fstab with
> UUID's
> (why do they have to be so damn _long_  - I could tolerate 12 digits like
> MAC
> addresses!).
>  Can somebody confirm, do these UUID's remain the same no matter which
> drive
> the system was booted from?
>
> Then I'll hafta try and get Grub2 installed on the MBR of my 40GB drive
> (since
> booting a system on one drive off the MBR of another seems like setting up
> for
> trouble next time I shuffle drives around).
> Which raises the question, why did Debian install the system on one hard
> drive
> and the Grub boot stage on another anyway?
>
> cr
>
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