On Thu, Oct 24, 2013 at 4:33 PM, Sven Hartge <s...@svenhartge.de> wrote: > 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.
+1 Unfortunately grub doesn't (yet) fallback to the secondary config: https://bugzilla.redhat.com/show_bug.cgi?id=1022743 -- 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/CAOdo=sxdq1hgk+l7-nmjkyqrv5fukjhprbfjnere_vsxt3n...@mail.gmail.com