On Fri, 01 Oct 2010 15:04:40 +0200, Christoph Kukulies <k...@kukulies.org>
wrote:
> I'm in the need of reading some data from old 5.25" floppy media (1.2MB).
> I lent 2 drives from neighbour institutes at the university and after
> having recalled that the
> floppies have to be enabled in the BIOS I'm now seeing the fd0 device in
> dmesg (FreeBSD 8.0 RELEASE).
Similat to this?
% dmesg | grep ^fd
fdc0: <floppy drive controller>
port 0x3f2-0x3f3,0x3f4-0x3f5,0x3f7 irq 6 drq 2 on acpi0
fdc0: [FILTER]
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
This is for a 3.5" drive of course, the 5.25"'s message should
read similar. FreeBSD 7 here.
> I can do a dd if=/dev/fd0 of=/root/fd0.dmp
>
> The select light is lit, the head motor seems to get power but the
> spindle doesn't spin.
>
> I tried that with two TEAC drives to no avail.
Strange, I would suspect drive electronics first... do you have
a "low end" PC (DOS) to check the drives? The lowest level diagnosis
tools are often the best. :-)
> Any clues what I may have forgotten? The drive is connected with the
> edge connector and the end is open.
Sounds correct.
> Does it need to be terminated?
No.
The position on the cable selects which "drive letter" will be
associated to a given drive; the one on the end is A:, the one
on the middle is B:. A single drive is usually connected to the
end of the cable. As the connector for 5.25" drive does have
a gap, you can't "wrongly connect" it. The connector to the
main board should also have a nose that prevents wrong cabling.
Wrong cabling is indicated by a permanent (!) activity light
on the drive.
Instead of using dd, can you maybe access the drive using mount
or the mtools (from ports)?
If you encounter further problems, I can get a working drive
and check here. I'm in a kind of working museum. :-)
--
Polytropon
Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...
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