Re: Reboot required: the system will be rebooted automatically in 15 seconds
Reply #1 –
Often when doing drive swapping / partition copying you have to do things like check /etc/default/grub and /etc/fstab content, and from a tty if you get that far in the boot sequence, or chroot terminal if you don't, like in this case, run:
# mkinitcpio -P
# update-grub
plus do any BIOS / UEFI grub bootloader stuff if needed, but it seems like you have already done that. fsck is probably getting run from your fstab entries and there could be a reference to a non existing FAT partition, perhaps the UUID or name has changed because it has been altered or moved.