3.5" floppy drive question(s)

[Fred Cisin]

> > Nobody has successfully used a 3.5" at 150RPM.  Yet.

On Sat, 11 Oct 2008, Philip Pemberton wrote:
> What about the old Amiga high-density drives that ran at 300RPM for DSDD and
> 150RPM for DSHD?

Sorry, I forgot about them.
I've never had any Amigas THAT new.

> The story I heard was that it worked out cheaper for CBM to get a bunch of
> speed-switching floppy drives made up instead of modifying the disc controller
> to support multiple data rates. I'm not sure I believe that...

It also provided a way to retrofit to machines that didn't support the
higher (1000bps) data transfer rate.  The Weltek 180 RPM 5.25" drive
provided 1.2M support to XTs.