编辑：不要做我在这个问题中所做的，查看下面的答案部分！
从 grub64efi 运行 Ubuntu 后，屏幕显示如下：
gave up waiting for root device. Common problems:
boot args (cat /proc/cmdline)
Check rootdelay= (did the system wait for long enough?)
Check root= (did the system wait for the right device?)
Missing modules (cat /proc/modules; ls /dev)
ALERT! UUID=1234-etc... does not exist. Dropping to a shell!
BusyBox v1.22.1 (Ubuntu 1:1.22.0-15ubuntu1) built in shell (ash)
Enter 'help' for a list of built-in commands.
(initramfs) _
我对 Windows 10 和 Ubuntu 16.04 进行了双重引导。
我是如何走到这一步的：