Date: Mon, 7 Jun 2004 16:20:54 +0200 (CEST) From: Olaf Hoyer <ohoyer@ohoyer.de> To: Daniel Ellard <ellard@eecs.harvard.edu> Cc: freebsd-hardware@freebsd.org Subject: Re: How to Format 1MB Floppy Message-ID: <20040607161901.Q90512@gaff.hhhr.ision.net> In-Reply-To: <20040607085908.Y42261@bowser.eecs.harvard.edu> References: <1086609808.314.9.camel@wokshopbsd.oocltd.dom> <20040607085908.Y42261@bowser.eecs.harvard.edu>
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On Mon, 7 Jun 2004, Daniel Ellard wrote: > On Mon, 7 Jun 2004, Adam Retter wrote: > > > Also someone mentioned that these 1mb disks only format as 720kb - is > > that true? > > That was probably me... What I meant is that there's a built-in > option to newfs_msdos for 720K disks, but I don't think there's one > for 1MB disks. If you want to use the entire disk, and the 1MB is the > real size (not some phony marketing size) then you'll need to specify > the geometry to the disk explicitly. You'll need to get this from > the disk vendor, I guess. > The raw capacity of those 3,5", DD disks is 1MB unformatted, and formatted for _PC_ its 720 kb. There were some different architectures, like Commodore Amiga and I think Apple, that used a different format strategy and were able to use more of that space. (Anyone remember VGA-Copy under DOS? also some tool to get some real weird formats done) HTH Olaf -- Olaf Hoyer ohoyer@gaff.hhhr.ision.net Fuerchterliche Erlebniss geben zu raten, ob der, welcher sie erlebt, nicht etwas Fuerchterliches ist. (Nietzsche, Jenseits von Gut und Boese)
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