Date   : Thu, 14 Jul 2005 21:11:08 +0100 (BST)
From   : Pete Turnbull <pete@...>
Subject: Re: floppy discs

On Jul 14 2005, 20:45, Tim Fardell wrote:
> A.J.Davis wrote:
> > I've found some HD disks work if you cover the HD hole.
>
> Ah, you're talking about 3.5" disks - these are generally
interchangable in my
> experience - HD disks normally work perfectly in DD drives.

That may depend on your definition of "perfectly" :-)  The difference
between the coercivity of 3.5" DD media (650 Oersted) and 3.5" HD media
(720 Oersted) is much less than in the case of 5.25" media, but
long-term reliability will still be an issue if you use the wrong type.

> However, I assume the original poster was talking about 5.25" disks,
which are
> a different kettle of fish entirely :-(

Yes, 300 Oersted for SD/DD versus 600 Oersted for HD.

-- 
Pete                                           Peter Turnbull
                                               Network Manager
                                               University of York