From: "Matthias Paul" Organization: Rechenzentrum RWTH Aachen To: opendos AT delorie DOT com Date: Thu, 9 Nov 2000 18:47:13 +0100 Subject: Re: DRDOS FDISK X-mailer: Pegasus Mail v3.22 Message-ID: <6E3407573B7@reze-1.rz.rwth-aachen.de> Reply-To: opendos AT delorie DOT com On Wed, 01 Nov 2000 Patrick Moran wrote: > [...] I was > trying to find out what the problem with FDISK is and their does not appear > to be any. It is the format it puts on the disk that is a problem. I use > DRDOS FDiSK to make NTFS, FAT 32, ext2fs and FAT 16 partitions and never had > a problem with any of those partitions. Since the root for all the trouble is the value reported by the Generic IOCTL function, it could be, that running the DR-DOS tools on MS-DOS/PC DOS will *not* show the problem. I didn't tried so far. Anyone? > [...] > > Either that one or the one at offset 0Ah in the BPB - I'll guess that DOS > > uses the FAT one in preference to the BPB one. > > I don't think so. I am not certain what that is used for, it is an extended > signature byte. It may be different in some versions, but it seems like it > was always a 29 hex. (At least for HDD.) This signature (29h fixed) is officially used to detect an extended BPB. (The use of the OEM label to make a few more decisions how to interpret the stuff is not documented as far as I can tell.) Matthias ------------------------------------------------------------------- Matthias Paul, Ubierstrasse 28, D-50321 Bruehl, Germany eMail: Web : http://www.rhrz.uni-bonn.de/~uzs180/mpdokeng.html -------------------------------------------------------------------