When doing a grub2-update you might see some funky chatter/errors during the rebuild. You might need to edit a “global_filter” in order to exclude such warnings.
Example: error:
![](https://www.gotitadmin.com/wp-content/uploads/2021/11/lvm-rebuild-error.png)
IF this happens you can edit the /etc/default/grub
You may either need to uncomment or add in something like
![](https://www.gotitadmin.com/wp-content/uploads/2021/11/grub2-global-filter.png)
This instance was specifically for my /dev/sdc error.
Now you can …
grub2-update