Just do:

grub-install /dev/sda1

...but don't you really want to install grub to the drive itself?  If do:

grub-install /dev/sda

Brian Cluff


On 10/26/2016 10:05 AM, Michael wrote:
> I messed up. I installed mint18 on my external drive but mint18 is not 
> quite ready for prime time so I figured I would put mint 17.3 on. 
> Well, durring installation I told it to put grub on the external 
> drive. now I can't boot unless the external drive is plugged in. I 
> need the port the external is plugged into because that is the only 
> USB port it will boot from and I need that port  for the thumb drive. 
> So  my question is how do I install grub to sda1......
>
> Mint won't boot now! How do I RESTORE WINDOWS SO i CAN DO THIS AGAIN?
>
> -- 
> :-)~MIKE~(-:
>
>
> ---------------------------------------------------
> PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org
> To subscribe, unsubscribe, or to change your mail settings:
> http://lists.phxlinux.org/mailman/listinfo/plug-discuss