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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