11 Oct
2008
11 Oct
'08
12:06 p.m.
Fred Cisin wrote:
Nobody has successfully used a 3.5" at 150RPM.
Yet.
Besides the "normal" 300RPM drives, there are some 600RPM (old Sony), and
360RPM (NEC and a few others)
What about the old Amiga high-density drives that ran at 300RPM for DSDD and
150RPM for DSHD?
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...
But yes, there were 600RPM 3.5" drives -- some Hewlett-Packard logic analysers
(1650A/B series mainly, IIRC) used them.
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/