Messages in this thread | | | Date | Wed, 2 Dec 1998 16:29:42 -0600 (CST) | From | Phil Brutsche <> | Subject | Re: NTFS partitions show up as OS/2 partitions. |
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On Wed, 2 Dec 1998, Jesper Juhl wrote:
> > Hi people, > > I recently tore down a Windows NT 4.0 server that used NTFS on two > partitions. When I ran (Linux) fdisk, I noticed that both partitions > showed up as OS/2 HPFS partitions. The machine has never had OS/2 > installed on it!
In the partition record on PCs there's a field (8 bytes) that "tells" what kind of file system the partition contains. Many OSs[1] would read these fields to tell what partitions it could use - that's why MS-DOS ignores partitions that aren't marked as one of 0x04 (a FAT16 filesystem <32 MB), 0x05 (a FAT16 system used on extended partitions), and 0x06 (FAT16 filesystems > 32MB). Win9x/NT, of course, expand that list.
In any case, OS/2 HPFS uses the ID# 0x07 in the partition record. For some reason, Microsoft chose to use that same ID# for NTFS partitions (according to my list[2], at least).
[1] - Linux isn't one of those - I've had Linux happily mount ext2 file systems that were in partitions marked as FAT16 (0x06). [2] - For reference, that list is available at http://www.creighton.edu~/pbrutsch/part.dat
---------------------------------------------------------------------- Phil Brutsche
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