Does deleting a partition below Ubuntu mess up grub?

[Tom H]

On Mon, Oct 13, 2014 at 4:39 PM, Colin Watson <cjwatson at ubuntu.com> wrote:
> On Sun, Oct 12, 2014 at 12:27:53PM -0400, Robert Heller wrote:
>>
>> UUIDs only helps when *Linux* mounts file systems -- it does nothing
>> for grub.
>
> This is quite untrue.  GRUB 2 uses UUIDs to find the file systems it
> needs; indeed this was one of the primary reasons we switched from GRUB
> Legacy to GRUB 2 some years ago.

Wasn't there an Ubuntu-only patch for grub1 to understand UUIDs?

IIRC, "root=(hdX,Y)" where sdX(Y+1) was the "/boot" device was
replaced by "uuid uuid_of_/boot_device"