Boot Fail After Edit Fstab

The problem lies with your fstab. When you created the new raid array, it ended up with a new UUID which is what you are using to specify your root filesystem. It looks like you can get to busybox (the emergency shell). Try:

• Mount up your root filesystem manually
• Edit /etc/fstab
• Put in the correct UUID (you can get it with blkid /dev/sdX1 or the output from your mdadm output in your screenshot)

You will need to remount root as read/write to edit fstab

• mount -o remount,rw /