From owner-freebsd-questions@FreeBSD.ORG  Wed Aug 18 13:55:42 2010
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Date: Wed, 18 Aug 2010 21:55:37 +0800
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Subject: fix bad directory on FAT32 usb disk
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I have a fat32 usb disk that gives this error when mounting with
mount_msdosfs /dev/da0s1    "bad fat32 file system"

Is there some way to clean or auto fix this fat32 file system so it will 
mount?