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Re: GPT probe: signature vs checksum

From: Andrew Clausen
Subject: Re: GPT probe: signature vs checksum
Date: Sat, 1 Dec 2001 08:19:04 +1100
User-agent: Mutt/1.3.17i

On Fri, Nov 30, 2001 at 03:05:54PM -0600, address@hidden wrote:
> > Can I contribute somehow to the spec?
> Probably.  http://developer.intel.com/technology/efi/efi.htm has the spec.
> http://developer.intel.com/technology/efi/feedback.htm is to submit
> feedback, but I've never gotten a response out of that.
> address@hidden and address@hidden are two people at
> Intel working on IA-64 Linux, and it was Asit that first contacted me about
> the PMBR change.  That's your best bet.


> -         if (ped_device_read(dev, legacyMbr, 0, 1)) {
> +         if (ped_device_read(dev, &legacyMbr, 0, 1)) {
> I think.

Right ;)  I haven't compiled yet... I'm making MAJOR changes to it.
(So far the 1.5.x version, is about 800 lines shorter than the 1.4.x one!)

> > i.e. define GPT present (possibly corrupt) vs GPT valid.
> That looks good to me.

Cool :)

> Then the test for valid GPT really moves into
> gpt_open() calling gpt_read(), where if one is valid and the other invalid,
> it gets fixed up automatically.


> I don't think the EFI Spec would need to be
> changed here then, it's an implementation detail that we probe before
> testing for valid.  OK.


> FYI, I'm testing a kernel patch from Red Hat that will allow us to drop the
> #if linux read/write last odd sector of a disk kludge from parted.  The
> kludge gets moved into the kernel. :-)

Ah, thanks :)


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