Re: must downgrade dracut on Fedora 26-28

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On Wed, 4 Jul 2018 09:15:02 +0200 Harald Hoyer wrote:
>   
> 
> apparently
> /dev/disk/by-id/md-uuid-e40a0234-7e52-5f10-f267-658d8ec463fa
> 
> changed its name to
> /dev/disk/by-id/md-uuid-e40a0234:7e525f10:f267658d:8ec463fa
> 
> Very strange...
> 
> /lib/udev/rules.d/63-md-raid-arrays.rules:ENV{DEVTYPE}=="disk", ENV{MD_UUID}=="?*", SYMLINK+="disk/by-id/md-uuid-$env{MD_UUID}"
> 
> /sbin/mdadm -D --export /dev/md127
> ...
> MD_UUID=e40a0234:7e525f10:f267658d:8ec463fa
> 
> I wonder if that changed with the new mdadm version.
> 
> Jake, maybe changing the kernel command line option from
> rd.md.uuid=e40a0234-7e52-5f10-f267-658d8ec463fa
> to
> rd.md.uuid=e40a0234:7e525f10:f267658d:8ec463fa
> helps in your case.

That certainly fixed things, thanks!

> Please file a bug against mdadm, stating that apparently the UUID changed.

I guess I don't see how mdadm plays a role here -- it hasn't changed ...
this was occurring on F26 and started months ago ... downgrading dracut
(and only dracut) to 044-183.fc26.x86_64 and then running (for
example for F28):

dracut -v --kver 4.17.3-200.fc28.x86_64

would create an initramfs that would boot ... either of the other two
dracut versions since create an initramfs that won't boot (but
apparently I can change the uuid format in grub2-efi.cfg as you figured
out) ...

seems weird that this happened and weirder that I am the only one (?)
that has run into it ... thoughts?

jake

-- 
Jake Edge - LWN - jake@xxxxxxx - https://lwn.net
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