Date   : Thu, 20 Jul 2006 01:01:08 +0100
From   : jgh@... (Jonathan Graham Harston)
Subject: Re: What types of 3.5" Floppy work best with the BBC

>Message-ID: <44BBEDD6.107@...>
 
Jules Richardson <julesrichardsonuk@...> wrote:
> Don't you get data reliability problems though, even if using DD media?
Isn't
> the head physically different? I'm sure there are documented problems - ISTR
 
You're thinking about early 5.25" drives where the head was a
different size on 40 track and 80 track drives. Nothing to do with
data density.
 
> particularly if you format/write a DD disk in a HD drive and then
subsequently
> try and read it in a true DD drive. To maintain compatibility it's best to
use
> a real DD drive, but if using a HD drive you can usually "get away with it".
 
No, if you format a HD *disk* at DD density, regardless of the
drive. For example, formating a "blue"/"one hole"/"720K" disk to
1440K DOS or 1600K ADFS.
 
-- 
J.G.Harston - jgh@...                - mdfs.net/User/JGH
Sheffield Boundary Review at http://mdfs.net/per