Re: Debian and UEFI and GPT

[Chris Davies <chris@roaima.co.uk>]

Tom H <tomh0665@gmail.com> wrote:
> On Thu, Oct 24, 2013 at 9:04 AM, Chris Davies <chris@roaima.co.uk> wrote:
>> I assume the 1MB space at the beginning is for grub_boot? I found I
>> needed that for my big (3TB) GPT disks. What's the space required at
>> the end of the disk?

> A gpt disk needs 34 sectors at its beginning; the 0th is the mbr, the
> 1st is the gpt header, the 2nd-33rd are for the partition table (for
> 128 possible partitions at 128 bytes per partition). And it needs 33
> sectors at its end; it's the same as the beginning minus the mbr.

What does it use those sectors at the end for? A duplicate of the ones
at the front? If so, do parted and other partitioning tools write to both?

Thanks,
Chris