Grub loading grub probe error cannot find device for root

Stuck in GRUB rescue mode. error: disk ‘lvmid’ not found.

Lỗi này do grub bị lỗi, để khắc phục boot vào rescurecd sau đó thực hiện update grub

~ # mkdir /mnt/vm1
~ # mount /dev/vg0/vm1 /mnt/vm1
~ # mount -o bind /dev /mnt/vm1/dev
~ # mount -o bind /dev/pts /mnt/vm1/dev/pts
~ # mount -o bind /proc /mnt/vm1/proc
~ # mount -o bind /run /mnt/vm1/run
~ # mount -o bind /sys /mnt/vm1/sys
~ # chroot /mnt/vm1 /bin/bash

Trong trường hợp boot vào rescuecd không tìm thấy LVM cần active lv

lvscan
modprobe dm-mod
vgchange -ay

Update grub

/usr/sbin/grub-mkconfig -o /boot/grub/grub.cfg

Trong Ubuntu Debian chạy lệnh sau

update-grub

VM Boots with Dracut Emergency Shell and warnings that specific locations do not exist on the file system after failover

Nguyên nhân:

the SCSI controller drivers, in this example the LSI Logic Parallel (MPTSPI) drivers, are missing from the recovery VM because the drivers are not available in the protected VM

In some cases, the latest PRM (Package Manager) and VMware tools on the Linux VM have not been installed

Khắc phục: build lại dracut

boot vào rescure như hướng dẫn trên sau đó gõ

source /etc/profile

dracut --regenerate-all --force