Date: Sat, 25 Dec 2004 22:34:39 -0800 From: Julian Elischer <julian@elischer.org> To: ticso@cicely.de Cc: freebsd-usb@freebsd.org Subject: Re: How to mount usb2 devices Message-ID: <41CE5B7F.3090805@elischer.org> In-Reply-To: <20041226002721.GG58581@cicely12.cicely.de> References: <41CD83E6.1010304@gmail.com> <20041225181725.GE58581@cicely12.cicely.de> <41CDEDE2.5030900@gmail.com> <20041226002721.GG58581@cicely12.cicely.de>
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Bernd Walter wrote: > On Sat, Dec 25, 2004 at 11:46:58PM +0100, Darksidex wrote: > >>Bernd Walter wrote: >> >> >>>It is running high speed, because it is attached to your ehci >>>controller. >>>Having high throughput is another story - msdosfs is not very efficient >>>with some devices - you might want to check a dd with big block sizes >>>to verify if higher speed can be reached. >>> >>> >> >>How can I do it? > > > dd if=/dev/da-whatever-number-it-is of=/dev/null bs=64k > You may want to test higher values for bs= too. I think that there is a lot of work that can be done to speed up USB2 devices.. for example Ugen devices can be sped up by an order of magnitude with a simple set of changes. (that I will commit when I clean them up) I have to guess that the Umass driver may have similar performance problems.
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