On Fri, Jun 28, 2024 at 2:10 PM Frank Bures <bur...@gmail.com> wrote:
>
> On 2024-06-23 11:43, Frank Bures wrote:
> > On 2024-06-23 04:29, Tim wrote:
>
> > I followed
> >
> > https://fedoraproject.org/wiki/GRUB_2?rd=Grub2#Updating_GRUB_2_configuration_on_UEFI_systems
> >
> > and then I tried to run
> > grub2-emu
> >
> > I get the list of installed kernels OK, but any choice for boot returns
> >
> > error: ../../grub-core/loader/emu/linux.c:319:cannot find kernel file
> > /vmlinuz-6.9.4-200.fc40.x86_64.
> >
> > and the same error for initramfs.  Please note the dot at the end of the
> > line, is it normal?
> >
> > No matter which kernel I choose, I get the error that kernel file was not
> > found.  All kernel files are in /boot and have correct permissions.
>
> As a general warning only:
>
> Never, I mean NEVER try to dd the boot disk to another permanently
> connected disk in a machine.  The existence of two identical UUIDs in the
> same machine created all kinds of problems, one of those exhibited itself
> as described in this thread.  But that was just the beginning.
>
> Actually I ended up trying changing the UUID on /dev/sga that somehow
> changed the UUID on /dev/sda by itself.  Even after wiping the sdg, blkid
> still reported an alive msdos partition, no matter how invisible in
> gparted.  It behaved like quantum entanglement :-).
>
> I had to wipe the disk completely and then remove all mentions of sdg* in
> /dev to free myself of this mess.
>
> After repairing /boot and /boot/efi, subsequent reboot worked normally.
>
> Very painful experience, suffice to say.  Never again!

Lol... quantum entanglement.

Another one to avoid: cheap SSDs with duplicate serial numbers. Some
manufacturers repeat (clone?) serial numbers, and when you try to use
them in a RAID configuration, things go badly. A fellow on a Ubuntu
list struggled for months because of it.

Jeff
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