"Failed to start Apply Kernel Variable" after converting the root filesystem from XFS to EXT4

Nicolas C. rh at nryc.fr
Thu Aug 6 06:06:42 UTC 2015


On 05/08/2015 19:01, Nicolas C. wrote:
> Hello,
>
> A had a RHEL7 VMware template with the root filesystem in XFS. I tried
> to copy the system to an EXT4 partition but now I have the message
> during boot : "Failed to start Apply Kernel Variable"
>
> http://i.imgur.com/atEjCuO.png
>
> This is how I've proceeded :
>
>   - boot on LiveCD
>
>   - copy from the XFS partition to EXT4
>
>   - chroot
>
>   - initramfs rebuild with "dracut"
>
>   - re-generation of "grub.cfg" with "grub2-mkconfig"
>
>   - /etc/fstab update to change the filesystem of "/" from "xfs" to "ext4"
>
> A few things :
>
>   - /boot partition is ext4 on its own 1G drive
>
>   - / partition is a LVM Logical Volume, the Physical Volume is a
> dedicated drive of 16G
>
> Anyone know how I can get further? I can boot the system in single mode
> or LiveCD... I try to remove all kernel options in the Grub menu, no
> success...

Solved by restoring the template with the XFS root filesystem and doing 
the same procedure but copying the system with "tar" instead of "mv".

I don't know what went wrong the first time but now it works.





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