Chris Davies <ch...@roaima.co.uk> wrote: > Tom H <tomh0...@gmail.com> wrote: >> On Thu, Oct 24, 2013 at 9:04 AM, Chris Davies <ch...@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? Yes, the sectors at the end are a backup version of the GPT, so if one ever accidently overwrite the start of a medium there is always another version of the GPT at the end. All GPT-aware tools must write to both versions and complain of they are not in sync. Grüße, S° -- Sigmentation fault. Core dumped. -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/6a5e714su...@mids.svenhartge.de
