Date: Sun, 26 Dec 2004 14:16:08 +0100 From: Bernd Walter <ticso@cicely12.cicely.de> To: Julian Elischer <julian@elischer.org> Cc: freebsd-usb@freebsd.org Subject: Re: How to mount usb2 devices Message-ID: <20041226131607.GJ58581@cicely12.cicely.de> In-Reply-To: <41CE5B7F.3090805@elischer.org> References: <41CD83E6.1010304@gmail.com> <20041225181725.GE58581@cicely12.cicely.de> <41CDEDE2.5030900@gmail.com> <20041226002721.GG58581@cicely12.cicely.de> <41CE5B7F.3090805@elischer.org>
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On Sat, Dec 25, 2004 at 10:34:39PM -0800, Julian Elischer wrote: > 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.. Likely - there is still a lot that can be done even for full speed 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. So you can speed up ugen devices - sounds interesting. What is the basic idea behind? -- B.Walter BWCT http://www.bwct.de bernd@bwct.de info@bwct.de
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