5.25" Floppy disk drive not recognized

Polytropon freebsd at edvax.de
Fri Aug 14 20:46:50 UTC 2020

On Fri, 14 Aug 2020 22:38:05 +0200, Christoph Kukulies wrote:
> neither less or cat works. I cannot totally exclude that the media don’t fit.
> The ones in questions here are CP/M 68k format. They are DD-DT.

In this case, using fdcontrol to change the drive's settings
is probably the correct way to go. Use the command

	% fdcontrol -F -v /dev/fd0

to see what drive and disk can tell about themselves. If that
is not correct, use fdcontrol's -s option to change the drive's

> OTOH, dd normally used to work on this kind of devices, didn’t it?

If the (hardware) formatting deviates too much from what the
drive's settings expect, it will only result in read errors.
This where something within the chain "OS - controller - drive -
medium" does not match the expectations. This is where fdcontrol
can be used to change those expectations. :-)

Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...

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