> I saw an entry in your log where the status was
> 0xcd.  It was for the 
> second READ_10 command.

You are right. It happens from time to time especially
when read the partition table and mount the device.
However, md5sum a file will give the correct result
always.

> Or maybe something fishy inside the integrated host
> controller.  Errors
> like you saw with that WRITE can sometimes be caused
> by irregular signal
> timing on the USB bus (caused by substandard
> hardware in the host
> controller).  It's possible that putting a
> high-speed hub between the host
> and the device will clean up the signal.

I have asked a hardware guy to help on measuring
clocks see if there is something suspicious. 
Meanwhile will try your suggestion. 

Thanks,
--Craig

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