grub2-mkconfig command shows "/usr/sbin/grub2-probe: error: failed to get canonical path of `/dev/mapper/rhel-root'." error message after renaming root lv.

Solution Verified - Updated 2022-04-14T12:11:56+00:00 -

Issue

# grub2-mkconfig -o /boot/grub2/grub.cfg
/usr/sbin/grub2-probe: error: failed to get canonical path of `/dev/mapper/vg_root-lv_root'.

Server fails to boot and goes in dracut shell after reboot.
From rescue mode, grub2-mkconfig command executed without any error which helped the server boot up successfully.
Why grub2-mkconfig command failed and server failed to boot as renaming root lv is online procedure?

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.