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Re: UUIDS

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On Sun, May 28, 2023 at 09:34:58AM -0400, Stefan Monnier wrote:
> >> I'm sure it used to be that you could swap linux discs between PCs and it
> >> would sort itself out but I try swapping disks about and booting and they
> >> complain
> >> "Cannot find UUID..lots of identifying numbers"
> >> and gives intramfs prompt.
> >
> > The system seems to try to mount the root file system, which seems to be
> > specified in the fstab by UUID. It doesn't. This can have several reasons:
> 
> That's quite likely indeed.
> 
> This said, I've had such UUID problems in the early boot (initramfs) that
> involved the swap partition rather than the root partition because the
> code that tries to resume from hibernation looks for some tell-tale sign
> in the resume partition (usually also playing the role of the swap
> partition), and this is done before trying to mount the root partition.

Yes, the boot loader not finding the root partition came also to mind.
I deemed that less likely because, if I understood correctly, the OP
is already in an initramfs shell.

> IIRC booting with `resume=no` on the kernel's command line worked around
> the problem in my case.

Yes, in your case, the system dumped its state into swap and kept
a remark "where" to get that state back. Not finding that partition
is then cause for much grief (refusing to boot _at all_ does seem
like one of those really nerdy design decisions which possibly isn't
helpful to end users...)

Cheers
-- 
t

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Re: UUIDS <tomas@tuxteam.de> - 2023-05-28 07:20 +0200
  Re: UUIDS Stefan Monnier <monnier@iro.umontreal.ca> - 2023-05-28 15:40 +0200
    Re: UUIDS <tomas@tuxteam.de> - 2023-05-28 17:40 +0200
      Re: UUIDS Stefan Monnier <monnier@iro.umontreal.ca> - 2023-05-28 18:10 +0200
        Re: UUIDS <tomas@tuxteam.de> - 2023-05-28 18:20 +0200

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