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Date:      Sun, 1 Dec 2002 14:44:56 -0800 (PST)
From:      Nate Lawson <nate@root.org>
To:        Poul-Henning Kamp <phk@critter.freebsd.dk>
Cc:        Riccardo Torrini <riccardo@torrini.org>, freebsd-current@FreeBSD.ORG
Subject:   Re: Trivial patch: fdisk doesn't recognize my partitions 
Message-ID:  <Pine.BSF.4.21.0212011443300.1744-100000@root.org>
In-Reply-To: <3475.1038522113@critter.freebsd.dk>

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On Thu, 28 Nov 2002, Poul-Henning Kamp wrote:
> In message <XFMail.20021128230029.riccardo@torrini.org>, Riccardo Torrini write
> s:
> >I have 4 primary partitions and I use a boot manager (magic.com)
> >that install some black magic that hide unused partition, this
> >permit to have multiple 'other-OS' partition that don't know of
> >each other (but, obviously, FreeBSD can see and mount all of them).
> >
> >As far as I know it use an EXOR 0x10 to hide/unhide but fdisk doesn't
> >recognize 0x0B/0x0C fat32 when hidden (0x1B/0x1C)
> >
> >This is the patch, that can be extended easily to cover the range
> >0x1A-0x1F (0x0A-0x0F when hidden).  I simply copied strings from
> >0x0B/0x0C and added Hidden in front of them  :-)  Any comment?
> >(I don't know if 0x1B/0x1C are registered as used)
> 
> I think this is very marginal use really...
> 
> If we really wanted to support this convention, we should not add
> (almost-duplicate) entries in the table, but rather on missing
> an entry in the table, try again after xor'ing with the "hide-bit"
> and see if we then get a hit.
> 
> But as I said, this is  rather marginal and I really don't feel
> it should go in unless this xor-0x10 convention is more widespread.

partition magic does this too. isn't the correct failure mode just to
print the part. id in hex instead of expanding it?

-Nate


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