On Thu, 3 Dec 2009, Roozbeh Gholizadeh wrote: > >> Besides, enabling sync option and having slow performance, couldnt this > >> also considered as a bug? > > > > Not really, your device could just be slow. Are you sure it isn't a > > device issue? > > > > Try doing this on a USB disk drive, with rotating media behind it, that > > would take the USB connection out of the loop. > > > > Yes. I am pretty sure it isnt my device issue or usb port issue. > 2 reasons : > 1.it works nice with windows and even in dos! > 2.at first the speed is really high, around 10mb/s but gradually speed > decreases. and also when you stop the transfer, device keeps working for > about 10-15 sec. but normally if you stop the trasfer, my usb device led > turns off. > I also checked this issue with 3 other usb flashdisk from 3 different > brands. If you want to get more detailed timing information, collect a usbmon trace. See Documentation/usb/usbmon.txt in the kernel source for instructions. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
