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Re: using GPT support in BIOS boot



"Jonathan A. Kollasch" <jakllsch%kollasch.net@localhost> writes:

> On Fri, Jan 07, 2011 at 01:31:52AM -0800, Thomas Mueller wrote:
>> Some questions on my part:
>> 
>> What versions of NetBSD is this good for?  Only 6 (current)?
>
> You need gpt(8) from current to install the new mbr_gpt code.
> You also need the new /boot and bootxx code.

Sorry for being slow, but does this imply that one can use gpt
partitions and boot them on a motherboard whose BIOS has no idea about
gpt, because the BIOS will load sector 0 and then it's all our code?
Or is this about accomodating newer computers with EFI boot?
(I realize this is a huge win for >2T drives.)

If so, is there any big advantage to doing this on a disk that's < 2T
when one is using the whole disk for NetBSD?  I agree that the fdisk
partitioning is a bit gross, but I have not had trouble from making wd0c
be 63-end * and then using disklabels.


* I understand about 4K physical blocks and why 63 is very bad - I just
  used GPT on "2T" (1963M) backup drives with 4K actual sectors and
  started at 64.

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