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Date:      Tue, 30 May 2006 19:37:29 -0700
From:      Colin Percival <cperciva@freebsd.org>
To:        Jon Falconer <jfalconer@puc.edu>
Cc:        questions@freebsd.org
Subject:   Re: transfer speed of USB on a Dell PE2650
Message-ID:  <447D0169.4050301@freebsd.org>
In-Reply-To: <Pine.BSI.4.05L.10605301806340.19294-100000@ecf2.puc.edu>
References:  <Pine.BSI.4.05L.10605301806340.19294-100000@ecf2.puc.edu>

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Jon Falconer wrote:
> I thought that an external USB hard drive would make a good backup device.
> So I did some trial file copies. Even though the servers USB ports are
> USB2.0 and the hard drive enclosure is USB2.0 I was getting a little less
> than 1MByte per second of throughput. I do have the ehci device as well as
> uhci and ohci configured into the kernel. But looking at the boot messages
> I do not see that it finds an ehci device, only an ohci. 
> 
> Has anyone gotten a full USB2.0 throughput on Dell PowerEdge server
> hardware?

I haven't used Dell servers, but I've gotten 25MB/s to a USB-attached
hard drive on a Dell laptop, so at least some Dell hardware works. :-)

Colin Percival



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