Device not booting up after disabling the HDD

Looking at your /etc/fstab from the other topic here>> System trying to boot from drive which doesn't have root partition - #9 by PhoenixAwakened
you have a number of entries for partitions on your hdd.

I think you would need to comment them out. You could use a Live usb, mount your system partition and edit /etc/fstab as root.