On Fri, 10 Nov 2006, mahendra varman wrote:

> Hi Alan
> 
> I tried to read data into the 1Gb transcend usb memory stick
> by using read(6)  with  LBA address 0...But iam not  getting any values...
> I tried using read(10) also....
> 
> In what other way we can check  whether the  procedure is  correct ?

If you're not getting any values then you don't need to do any more 
checking.  You KNOW the procedure isn't correct.

You could try getting some more information to find the problem.  For
example, what does the CSW contain?

> Some commands i noted test unit ready , read capacity
> initially can i try that

Of course you can.  You don't need my permission.  :-)

> I found one article explaining abt the data captured in the usb drive ......
> (i have attached that figure to u )
> while decoding the CBW in that figure they had used 12 h as operational code
> but 12h is for Inquiry command, but in the article they had said as reading
> from usb drive
> 
> can u explain this...?

No, I can't explain an article I have never read.  It could be they meant 
that the INQUIRY command involves transferring data from the device to the 
computer, rather than from the computer to the device.

> Thanks again for ur continous support

You're welcome.

Alan Stern


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