Re: using GPT support in BIOS boot

[Joerg Sonnenberger <joerg%britannica.bec.de@localhost>]

On Sat, Jan 08, 2011 at 12:52:28AM +0000, David Brownlee wrote:
> On 6 January 2011 17:36, Jonathan A. Kollasch 
> <jakllsch%kollasch.net@localhost> wrote:
> > On Thu, Jan 06, 2011 at 09:06:33AM -0800, Jeff Rizzo wrote:
> >> One thing that I was curious about: whether it's important to start
> >> the partition at 64 like you did.  The answer: apparently not.  I
> >> just let gpt add do its default thing, and it started at 34 and
> >> worked fine.
> >
> > No, it's not, but given the 4KiB-physical-sector disks around these
> > days, it's a good idea to make it a multiple of 8 DEV_BSIZE sectors.
> > I could have gone with 40, but I figure a partition starting at
> > 32KiB looks more elegant than one starting at 20KiB...
> 
> Maybe gpt add should be defaulting to 4K alignment?

I would actually suggest to align to 128KB or even 256KB by default.
I doubt anyone cares much about the wasted space and it would make RAID
and SSD setups more happy out of the box.

Joerg