Does deleting a partition below Ubuntu mess up grub?

[Colin Law]

On 12 October 2014 17:21, William Scott Lockwood III <scott at guppylog.com> wrote:
>
> On Sun, Oct 12, 2014 at 11:19 AM, William Scott Lockwood III
> <scott at guppylog.com> wrote:
>>
>> On Sun, Oct 12, 2014 at 11:15 AM, Colin Law <clanlaw at gmail.com> wrote:
>>>
>>> That confuses me, Robert says that grub cannot use UUIDs, so if it is
>>> expecting to boot from /dev/sda5 and sda5 is no longer the same
>>> partition then it will not boot.
>>
>>
>> https://bbs.archlinux.org/viewtopic.php?id=166217
>
>
> http://ubuntuforums.org/showthread.php?t=1373394

Well that suggests that I should not have a problem even if the
partition numbers change, as looking in /boot/grub.cfg I see the entry

menuentry 'Ubuntu, with Linux 3.2.0-70-generic' --class ubuntu --class
gnu-linux --class gnu --class os {
    recordfail
    gfxmode $linux_gfx_mode
    insmod gzio
    insmod part_msdos
    insmod ext2
    set root='(hd0,msdos5)'
    search --no-floppy --fs-uuid --set=root 6e742c8a-134f-4a8d-91eb-eee3f14d4836
    linux    /boot/vmlinuz-3.2.0-70-generic
root=UUID=6e742c8a-134f-4a8d-91eb-eee3f14d4836 ro   quiet splash
$vt_handoff
    initrd    /boot/initrd.img-3.2.0-70-generic
}

And one of the posts in that thread says that set root='(hd0,msdos5)'
is only used if the uuid from the search line below it fails.  If so
then it would not matter if partitions get re-numbered, so I can just
go ahead and delete sda3.

Colin

>
>
>
> --
> W. Scott Lockwood III
> AMC Tech (SPI) / GWB BoD / GWB2009033817
>
> --
> ubuntu-users mailing list
> ubuntu-users at lists.ubuntu.com
> Modify settings or unsubscribe at:
> https://lists.ubuntu.com/mailman/listinfo/ubuntu-users
>