(help)(usb masstorage problem)

[mike han]

Dear friends:

My usb device support SD card, but if I translate large data from PC to
usb device, PC always show "Can't copy ..., Parameter Error", I don't know
what's this meaning. for detail, when PC show the error message, it means
what error happend for my USB device.
the usb device is developed by me,and it is USB1.1.

Thank you very much.

Best Regards
Mike Han

 

[ZG]

I'm not sure if it's same as 'Delayed write error' which is discussed very
often in many usb dev forums. Somebody says it's caused by the firmware or
timing of the transaction.