[Techtalk] Extended Partitions - I found it! - not quite.

[Conor Daly]

On Thu, Nov 20, 2003 at 01:52:22PM +0100 or so it is rumoured hereabouts, 
Hamster thought:
> On 19 Nov 2003 20:39:38 -0500
> TechChiq <techchiq at hotpop.com> wrote:
> 
> > 0x85   Linux extended partition type
> > 0x05   DOS extended partition type
> 
> Umm, the problem here is that the two extended partition types I originally
> asked about were 0x0F, which is a win LBA extended partition and 0x85 which
> is called a linux extended partition. I never mentioned the DOS one at all.

Interestingly, Table 3-2 on http://www.ntfs.com/partition-table.htm cites
0x0F as:

"0x0F Primary Fat16 partition, using INT 13 extensions."

http://support.microsoft.com/default.aspx?scid=http://support.microsoft.com:80/support/kb/articles/q148/8/21.asp&NoWebContent=1
says:

"Possible Data Loss with LBA and INT13 Extensions"

" This situation is known to occur only when all of the following
conditions exist:

    * The hard disk is a large (>504 MB) Enhanced IDE hard disk.
    * The hard disk is accessed using Logical Block Addressing (LBA).
    * The hard disk has been partitioned into multiple partitions with the
	Windows 95 version of FDISK, or another partitioning utility that creates
	MS-DOS extended partition types 0x0E and 0x0F.
    * The system BIOS supports INT13 extensions to access hard disk
	devices. "

http://www.monkey.org/openbsd/archive/bugs/9910/msg00026.html

claims it as:

"#define DOSPTYP_EXTENDL 0x0f		/* Extended, LBA-mapped; contains
sub-partitions */"

while

http://lists.debian.org/debian-user/2003/debian-user-200311/msg00442.html

says:

"the installation CD, it sees but fails to recognise the extended partition"

and:

"I think, that the extended partition has a partition type of 0x0f rather
than 0x05 which appears to be the standard code for an extended partition.
(The partitions were created by System Commander.)"

so, ntfs.com thinks it's a primary fat16 partition with INT13 extensions, microsoft think it's
an extended partition, openbsd is convinced it's an extended with LBA
addressing and debian installers can't see it.

I still don't know what it is but _I_ sure won't be using it!

Conor
-- 
Conor Daly <conor.daly at oceanfree.net>

Domestic Sysadmin :-)
---------------------
Faenor.cod.ie
  3:46pm  up 28 days,  8:54,  0 users,  load average: 0.01, 0.27, 0.21
Hobbiton.cod.ie
  3:44pm  up 28 days,  8:53,  1 user,  load average: 0.03, 0.04, 0.00