I ran into an issue where I had a usb ssd drive that I built Centos 8 upon. After I relocated it to the onboard controller I preceded to boot the system and wallah!
Warning: /dev/centos/root does not exist Warning: /dev/centos/swap does not exist Warning: /dev/mapper/centos-root does not exist ... dracut#
To no surprise I went right into dracut# prompt. So what happened? Well I configured it as an LVM disk so when I relocated it the drive was on a different controller hence the config changed. So now what?
- Boot into rescue mode
- List the initramfs images
ls -ltrh /boot/initramfs-*- Locate the kernel version you’re using and create a backup of it:
cp -iv /boot/initramfs-4.18.0-193.el8.x86_64.img /boot/initramfs-4.18.0-193.el8.x86_64.img.<date>
- Rebuild the kernel image for that specific kernel
dracut -f- Select the new kernel image
ls -ltrh /boot/initramfs-*- Specify the new kernel version (For Example):
dracut -f /boot/initramfs-4.18.0-193.el8.x86_64.img 4.18.0-193.el8.x86_64- Generate a GRUB2 configuration file and reboot
grub2-mkconfig
reboot
Thats it, thansk to: https://unix.stackexchange.com/questions/425045/warning-dev-centos-root-swap-centos-root-does-not-exist-after-configuring-dr
