[rescue] 5.25" floppy on modern PC

[Chad Fernandez]

gsm at mendelson.com wrote:

> reading 360k disks written on 720k (80 track, "low density") drives and 
> AT drives, both of which wrote narrower tracks, the later 360k drives 
> were made with the narrower heads. I'm sure there was also a cost saving 
> having only
> one type of head in stock.

There were 720K 5.25" drives?

> 
> If you are trying to read 360k disks written on 720k or 1.2m drives, you
> would be better off with the narrow head AT drives, if you are trying to 
> read
> disks written on 360k full track drives, you would be better off using 360k
> full track drives.
> There are also problems reading disks written at  300 RPM (PC) in 360 
> RPM (AT) drives, but I don't know what they are.
> I have no idea of how to tell, but my guess is that the full height 
> drives are
> wide track.

I had no idea there were any possible RPM issues.

Thanks, Geoff..... I think you just opened a case or worms :-)

Chad Fernandez
Michigan, USA