Re: Multiple partition maps

[phcoder <phcoder@gmail.com>]

Robert Millan wrote:
> On Wed, Sep 03, 2008 at 08:08:50PM +0200, phcoder wrote:
>> Hello. I was looking at the grub code and seen that if a disk has
>> multiple partition tables (e.g. macintel with bootcamp) then only first
>> one will be detected. In some cases it can lead to unreachable
>> partitions if for some reason partition is present only in one table.
>> Does anyone has an idea how theese cases may be treated compactly and
>> efficiently?
> 
> Strictly speaking, GPT+MSDOS hybrid tables are a violation of the GPT
> specification.  It's not clear what would be the "correct" way of handling
> them.
> 
> Since we're not a legacy program, I suppose the sane thing to do would be
> to abort MSDOS probing if a protective DOS partition (0xee) is found, and
> then only GPT will be used.

We're not a legacy application but some OS and partition tools are and
we have to work with them. I think just some maintenance tools included
in GRUB should be enough. I'll write them soon. (perhaps even tomorrow)
> 
> Isn't this what GRUB does already?  I thought it would be...
> 
It does. But I don't know if there are other cases similar to this one.

Vladimir 'phcoder' Serbinnenko