GUID partitioning

Tom H tomh0665 at
Fri Oct 29 04:51:54 UTC 2010

On Fri, Oct 29, 2010 at 12:19 AM, Goh Lip <g.lip at> wrote:
> On Friday 29,October,2010 12:02 PM, Tom H wrote:
>> On Thu, Oct 28, 2010 at 11:38 PM, Goh Lip<g.lip at>  wrote:
>>> Has anyone tried GUID partitioning (GPT) on a BIOS based system - as
>>> opposed to UEFI?
>>> It would seem to be a drastic and 'quantum leap' to even try this out
>>> and would appreciate feedback on advantages, pitfalls, dangers,
>>> revertiblity, etc - okay, all and any comment.
>> Yes. You have to remember to create the first partition as a
>> mini-partition for grub to embed core.img otherwise there's nothing
>> noticeably different.
> Okay..., need a sort-of 'mbr' partition, if I understand you correctly,
> then a 'boot-loader' type of partition, swap, then all others.
> But, but but ..... :)  did you see any advantage, any reason to do this,
> no reason to do this.. what does the bios do then..? etc...
> Thanks, Tom.
> ps: googled pages do not 'explain' experiences, just technical how-to's
> or what's.

You're welcome.

The actual partition is called bios-grub, it has to be about 1MB, and
you have to use parted to create it (AFAIK, fdisk can't handle the

I had to use GPT because of a 3TB disk and BIOS/MBR can only handle up
to a 2TB partition.

I've never had a UEFI box other than my MBP and I only have OSX on it.

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