[CentOS] Weird problems with CentOS 7.6 1810 installer

[Simon Matter]

>>
>>
>>
>> Commands line options:
> rd.debug rd.udev.debug systems.log_level=debug
>
> That willl be incredibly verbose, and slows things down a lot, so in the
> off chance there's a race, you might get different results. But if not,
> the
> log should contain something useful.
>
> I like the hypothesis about mdadm metadata version 0.9, however that's
> still really common on RHEL and CentOS. It was used for /boot prior to
> about Fedora around Fedora 24 maybe?

At least I didn't have any problems on my systems having all metadata
version 1.2, which seems the default for CentOS 7.

Maybe it's a good idea to upgrade those arrays with older metadata before
doing the 7.6 upgrade.

Regards,
Simon