[SOLVED] boot failure with "mdadm: no devices listed in conf file" error after upgrade to 7.1.8 and kernel 5.13.19.2

[Roger Simpson]

Hi all,

I have performed an upgrade on a single host running 7.1.5 to go to 7.1.8.
As part of that upgrade there was also a kernel upgrade from 5.11.22.7 to 5.13.19.2.
After rebooting to that new kernel, I faced a boot failure related to mdadm with the message looking like is shown on the picture below (not mine but just showing the exact same error message):


After catching the boot sequence, I selected the kernel 5.11.22.7 and the boot was successful.

The system is running on a virtual drive from mdadm over 3 physical drives.

Could somebody provide some guidance on what to check prior to upgrading to 5.13? I have no idea why the upgrade affected mdadm so fundamentally.

 

[Roger Simpson]

Answering myself, it looks like my boot partition is too small due to left over kernel versions and the update did not properly complete.
I did some clean up and I could restart with the new kernel.