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Date: Tue, 10 Aug 2010 18:12:15 +0200
From: Antonio Vieiro <antonio@antonioshome.net>
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Subject: Re: problem mounting USB drive
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On 10/08/2010 17:32, Ott Köstner wrote:
> [...]
>
> In the /var/log/messages the following message appears:
>
> Aug 10 18:27:40 ott kernel: mountmsdosfs(): bad FAT32 filesystem
>
> The drive is OK and works fine with Windows. Also, USB flash thumb
> drives work fine, when used in the same manner with my FreeBSD.
> System version is 8.0-STABLE, but this is probably irrelevant here.
>

The fact that the drive is working on Windows does not mean it's FAT32 
formatted. It may as well be NTFS formatted ("man mount_ntfs").

Doublecheck you're running a FAT32 system: FreeBSD is saying you're not.

Cheers,
Antonio