Date: Fri, 29 Nov 2002 08:38:11 +0100 (CET) From: Riccardo Torrini <riccardo@torrini.org> To: Bruce Evans <bde@zeta.org.au> Cc: freebsd-current@FreeBSD.ORG, Poul-Henning Kamp <phk@critter.freebsd.dk> Subject: Re: Trivial patch: fdisk doesn't recognize my partitions Message-ID: <XFMail.20021129083811.riccardo@torrini.org> In-Reply-To: <20021129122955.K15170-100000@gamplex.bde.org>
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On 29-Nov-2002 (01:34:27/GMT) Bruce Evans wrote:
RT>>> I have 4 primary partitions and I use a boot manager (magic.com)
[...]
RT>>> As far as I know it use an EXOR 0x10 to hide/unhide but fdisk
RT>>> doesn't recognize 0x0B/0x0C fat32 when hidden (0x1B/0x1C)
PHK>> I think this is very marginal use really...
PHK>> But as I said, this is rather marginal and I really don't feel
PHK>> it should go in unless this xor-0x10 convention is more widespread.
BE> "Hiding" partitions is a bug IMO, so it should have negative
BE> support. This convention would break many OS's conventions.
BE> E.g., NextSTEP | 0x10 gives BSDI.
Yes, indeed. Anyway 0x10-0x1F range seems to be for hidden partition,
this is why I go the wrong way. Sorry for wasting time. :(
If you check this you can find symmetric partition type (as written in
.../fdisk.c,v 1.66 2002/10/27 10:52:54 phk):
real ,{0x01, "Primary DOS with 12 bit FAT"}
hidden ,{0x11, "OS/2 BM: hidden DOS with 12-bit FAT"}
real ,{0x04, "Primary DOS with 16 bit FAT (< 32MB)"}
hidden ,{0x14, "OS/2 BM: hidden DOS with 16-bit FAT (< 32MB)"}
real ,{0x06, "Primary 'big' DOS (>= 32MB)"}
hidden ,{0x16, "OS/2 BM: hidden DOS with 16-bit FAT (>= 32MB)"}
real ,{0x07, "OS/2 HPFS, NTFS, QNX-2 (16 bit) or Advanced UNIX"}
hidden ,{0x17, "OS/2 BM: hidden IFS (e.g. HPFS)"}
Only for this I added 0x1B/0x1C as hidden version of 0x0B/0x0C.
real ,{0x0B, "DOS or Windows 95 with 32 bit FAT"}
myidea ,{0x1B, "Hidden DOS or Windows 95 with 32 bit FAT"}
real ,{0x0C, "DOS or Windows 95 with 32 bit FAT (LBA)"}
myidea ,{0x1C, "Hidden DOS or Windows 95 with 32 bit FAT (LBA)"}
Riccardo.
PS: maybe XOR-0x10 only if <= 0x1F ?
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