Reusing old floppy *drives*

[Roger Ivie]

On Tue, 23 Mar 2010, Gene Buckle wrote:
> How are you going to handle the data rate difference?  If memory serves, 
> using  1.44MB media results in a higher RPM and a higher data rate.

3.5" drives don't change speed; they always run at 300 RPM. That's why
HD diskettes hold 1.44MB instead of 1.2MB.

The average PC HD 5.25" *also* doesn't change speed, but runs at 360 RPM
instead of the usual 300 RPM. That's why you need a data separator that
runs at 300 KHz instead of 250 KHz to read a DD diskette in the average
PC HD 5.25" drive.

The DEC RX33 5.25" drive *does* change speed. It runs at 300 RPM for DD
media and 360 RPM for HD media.
-- 
roger ivie
rivie at ridgenet.net