One of the common problems after boot from a cdrom is accessing the devices or processes that runs from the cd but inside the jail of the chroot. You can bind some already mounted system folders like /dev, inside our root partition. Here's what I usually do: Boot up from a rescue cd Mount root partition to /mnt and boot partition into /mnt/boot. mount --bind /proc /mnt/proc mount --bind /sys /mnt/sys mount --bind /dev /mnt/dev chroot /mnt (you just went live on the system) Now Read more...
if running grub-install it shows this error message
Error /dev/sda does not have any corresponding BIOS drive and Solution
grub-install --recheck /dev/sda
It will probe a device map even if it already exists.