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From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
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Cc: Garrett Cooper <yanegomi@gmail.com>, freebsd-current@freebsd.org,
	freebsd-questions@freebsd.org, Hans Petter Selasky <hselasky@c2i.net>
Subject: Re: USB system: FreeBSD 9-STABLE and 10-CURRENT do not recognize
 64GB USB drive while Linux and Windows do
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> and hardware in the lab on last week.
> I reformatted the USB drive with extFAT and standard block size on
> Windows 7. The USB drive is now seen again on FreeBSD and recognized as
this points that the pendrive's controller is not just flaky but horrid.
The communiation with OS, and how/whether it is configured properly should 
not depend on what data is written to it - in your case exFAT metadata.

It seems that controller manufacturer just did something "to run on 
windows and linux" instead of something that conform to USB mass storage 
interface standard :(

Sorry but it may be hopeless case.