Guys, are you even using linux?  You're asking generalized USB questions to
linux-specific mailing lists.

Matt

On Tue, Jun 12, 2007 at 11:03:26AM +0530, Balan, Vineeth (IE10) wrote:
> Hi Alan
> 
>  We are not still able to get the device to respond .The command
> sequence that we are using: 
> 
> 1. Read 10  - response is STALL.
> We then clear feature command. And a Bulk in to retrieve the CSW of
> failed Read 10.
> 2. Request Sense: 18 bytes of sense data and CSW. Sense data shows 06 -
> UNIT Attention condition.
> 3. Read 10  Stall again. 
> 
> How do we resolve this issue? We are using an OHCI controller and the
> device is USB 2.0 compatible. Is this a factor?
> Should we give a specific amount of time between a UNIT ATTENTION
> condition and next Read 10. We have also noted that all medium access
> commands fail but others like Read Capacity, TUR, is successful.
> 
> PS: Siddharth is my mentor.
> 
> Yours truly,
> vineeth
> 
> 
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Alan
> Stern
> Sent: Sunday, June 10, 2007 8:41 PM
> To: Karnik, Siddharth (IE10)
> Cc: [EMAIL PROTECTED]
> Subject: Re: [usb-storage] Mass storage device NAK's
> 
> On Sun, 10 Jun 2007, Karnik, Siddharth (IE10) wrote:
> 
> > Thanks alan,
> > 
> >  
> > 
> > As you said The problem of continuous NAK's was from my computer,it
> was
> > issuing IN's.
> > 
> >  
> > 
> > But I am still not able to get around with the original problem of
> > Read10 command Naking.I am pasting my trace as below. Please let me
> know
> > where am I going wrong
> > 
> >  
> > 
> >  
> > 
> >  
> > 
> > Then I issue read 10(same command issues earlier)
> > 
> >  
> > 
> >  
> > 
> >  
> > 
> > This results in series of Nak's and device never sends data even after
> > long wait.
> > 
> >  
> > 
> > Kindly let me know what should be done.
> 
> Try using a different device.
> 
> Alan Stern
> 
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-- 
Matthew Dharm                              Home: [EMAIL PROTECTED] 
Maintainer, Linux USB Mass Storage Driver

I'm a pink gumdrop! How can anything be worse?!!
                                        -- Erwin
User Friendly, 10/4/1998

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