I have used HDs as DDs before (specifically on the Mac, so it is relivant to your situation, as it is dealing with going from 1.4 to 800 or 400k). I can tell you that it does work, but not reliably. The data seems to fail over time, not so much length of time, but read/write time. Unfortuantly, the length varies greatly (and seems format dependant, not disk dependant). Sometimes they work for a dozen or so uses, other times they might work for 100 or so. Once they start to fail, reformatting them seems to refresh the usability. I have learned that it simply isn't reliable enough except to use for short term temporary work. HOWEVER, the good news is, MEI Micro still seems to sell DD disks. They only sell them in a 500 pack for $50, which is kind of a bummer, but at least they can be bought. You can find them on MEI's web site (but not in their print catalog) at http://www.mei-microcenter.com. I have used their floppy disks in the past and have never had any problems with them. Last time I bought their disks, I believe they were actually generic labeled Sony's, but that was some years ago, and I would guess they get their's -chris <http://www.mythtech.net>