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Date: Mon, 04 Apr 2005 19:45:28 -0700
From: "Kevin G. Eliuk" <canonalis@dccnet.com>
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To: Jason Taylor <jason@infinitebubble.com>
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cc: freebsd-questions@freebsd.org
Subject: Re: Formating a 1680k floppy
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Jason Taylor wrote:

> Kevin G. Eliuk wrote:
>
>> Are you sure you don't mean 1720k?  Look at "/etc/disktab" for
>
> I'm sure.  I get the same results trying to create a 1720k.
>
> %fdformat -f 1680 /dev/fd0
> fdformat: unknown format 1680 KB for drive type 1.44M
> %fdformat -f 1720 /dev/fd0
> fdformat: unknown format 1720 KB for drive type 1.44M
> %fdformat -s 21,,,,80 /dev/fd0
> Format 1680K floppy `/dev/fd0'? (y/n): y
> Processing E^C--------------------------------------
> %fdformat -s 21,,,,82 /dev/fd0
> Format 1722K floppy `/dev/fd0'? (y/n): y
> Processing E^C--------------------------------------

My mistake.  ( I haven't looked at this procedure in a loooong while).  
I have just successful in creating a 1722 by:

# fdcontrol -f 1722 /dev/fd0
# fdformat fd0
Format 1722K floppy `/dev/fd0'? (y/n): y
Processing VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV done.

Not sure about a 1680:

# fdcontrol -v -f 1680 /dev/fd0
fdcontrol: unknown format 1680 KB for drive type 1.44M

Hope this helps a bit.

-- 
Cheers,

Kevin.