5.25" Floppy disk drive not recognized

Polytropon freebsd at edvax.de
Fri Aug 14 19:13:09 UTC 2020

On Fri, 14 Aug 2020 09:42:34 +0200, Christoph Kukulies wrote:
> I’m trying to access a 5.25“ floppy disk drive if anyone here
> knowing what a „floppy“ disk drive is. :)
> MB is a ASRock939A790GMH
> I see the drive in the BIOS although I’m not sure if it is
> really „connected“.
> Anyway, the FreeBSD (12.1) boot doesn’t see the hardware at all.

You should see two significant entries in dmesg output:
First is the floppy drive controller, second is the
drive itself. On OS startup, a short "brrt" from the
drive should be heared, with the activity light on
during the sound.


% dmesg | grep ^fd
fdc0: <floppy drive controller> port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on acpi0
fdc0: [FILTER]
fd0: <1440-KB 3.5" drive> on fdc0 drive 0

Yes, this is a real floppy drive. :-)

Verify correct connection - important! The cable has
two positions, "first drive" and "second drive", and
two connectors on each position. BIOS settings should
match to what you have actually connected where.

A common setting is to have a 3.5" floppy as A:, the
first drive, connected at the end of the cable, after
the "cable twist", and a 5.25" floppy as B:, the second
drove, before the "twist". If you change that order,
make sure BIOS settings match it.

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

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