Date: Thu, 24 Feb 2005 11:12:43 -0800
From: Greg KH <greg@kroah.com>
To: Lukas Hejtmanek <xhejtman@mail.muni.cz>
Cc: linux-kernel@vger.kernel.org
Subject: Re: USB 2.0 Mass storage device
Message-ID: <20050224191243.GD11806@kroah.com>
References: <20050224175918.GA7627@mail.muni.cz> <20050224181347.GA10847@kroah.com> <20050224182300.GA7778@mail.muni.cz> <20050224184928.GA11490@kroah.com> <20050224190548.GA7978@mail.muni.cz>
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On Thu, Feb 24, 2005 at 08:05:48PM +0100, Lukas Hejtmanek wrote:
> On Thu, Feb 24, 2005 at 10:49:28AM -0800, Greg KH wrote:
> > > This is the device:
> > > http://www.msi.com.tw/program/support/download/dld/spt_dld_detail.php?UID=607&kind=6
> > > 
> > > Btw, I thought, that ehci-hcd driver handles both usb 2.0 and 1.1. Does it?
> > 
> > No, it hands off the usb 1.1 devices to the usb 1 core inside it.  This
> > is either uhci or ohci, depending on your controller chip.
> > 
> > Unless you put a USB 2.0 hub in front of a usb 1.1 device, then it gets
> > more complicated, but we'll just ignore that issue for now...
> > 
> > What does /proc/bus/usb/devices show for this device?
> 
> When connected through uhci-hcd:
> T:  Bus=04 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=12  MxCh= 0

Your device is only reporting that it can go at 12Mbit (full speed, not
480Mbit, which is high speed.)

So it's working properly, but not labeled clearly on the box.  We've
seen this a lot, you are not alone in your confusion.

I suggest you return it and get a better device.

thanks,

greg k-h
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