From owner-freebsd-hackers Thu Sep 7 14:52:30 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.freebsd.org (8.6.12/8.6.6) id OAA11120 for hackers-outgoing; Thu, 7 Sep 1995 14:52:30 -0700 Received: from irz301.inf.tu-dresden.de (irz301.inf.tu-dresden.de [141.76.1.11]) by freefall.freebsd.org (8.6.12/8.6.6) with ESMTP id OAA11111 for ; Thu, 7 Sep 1995 14:52:15 -0700 Received: from sax.sax.de by irz301.inf.tu-dresden.de (8.6.12/8.6.12-s1) with ESMTP id XAA14929 for ; Thu, 7 Sep 1995 23:50:59 +0200 Received: by sax.sax.de (8.6.11/8.6.12-s1) with UUCP id XAA18913 for freebsd-hackers@freefall.freebsd.org; Thu, 7 Sep 1995 23:50:58 +0200 Received: (from j@localhost) by uriah.heep.sax.de (8.6.12/8.6.9) id XAA09378 for freebsd-hackers@freefall.freebsd.org; Thu, 7 Sep 1995 23:20:27 +0200 From: J Wunsch Message-Id: <199509072120.XAA09378@uriah.heep.sax.de> Subject: Re: higher density diskettes To: freebsd-hackers@freefall.freebsd.org Date: Thu, 7 Sep 1995 23:20:27 +0200 (MET DST) Reply-To: freebsd-hackers@freefall.freebsd.org In-Reply-To: <199509071133.NAA03804@gilberto.physik.rwth-aachen.de> from "Christoph P. Kukulies" at Sep 7, 95 01:33:34 pm X-Phone: +49-351-2012 669 X-Mailer: ELM [version 2.4 PL23] MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Content-Length: 1228 Sender: hackers-owner@FreeBSD.org Precedence: bulk As Christoph P. Kukulies wrote: > > Microsoft has switched to using so called DMF format > (Distribution Media Format - 1,716,224 bytes 1.63 MB) on > diskettes for the WIN95 distrubution disks. Also for the boot floppy? I suppose not. There has been an article in the c't magazine lately (about 3 or 4 months ago) discussing OS/2's installation floppy layout, and comparing it against another scheme. The idea of all those formats is, unlike our tweaked and squeezed 1720 KB format, to increase the physical sector size and format a track with sectors of non-uniform sizes. Look into that c't, Christoph. Needless to say, you cannot boot off such a disk, since it's not supported by any BIOS. Neither can you dd this on another Unix box. Makes it rather worthless for us. I still wouldn't trust a `squeezed' floppy. I've seen enough dead 3.5in floppies with standard formats to like stressing those beasts too much. > blues# mount -t msdos /dev/fd0.1720 /mnt > mountmsdosfs(): root directory is not a multiple of the clustersize in length This is a warning. Don't care. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ Never trust an operating system you don't have sources for. ;-)