Hello, all, AS> On Sat, 26 Feb 2005, Alberto Garcia wrote:
>> Em S�bado 26/02/2005 �s 11:16, Valentine Sinitsyn dizia... >> >> > This problem has a long history and was discussed many times (last >> > one in January) in this list with no solution. >> >> Does anyone know if this problem is Linux specific? Does the same >> hardware work well with other operating system(s)? I don't have any >> other OS in my computer, so I can't check. AS> In an earlier exchange (in January) Valentine said that his drive worked AS> under Windows. This sort of problem is often very hard to solve because AS> there's no clear indication what's causing it. Probably we won't figure AS> it out until someone can track it with a USB bus analyzer, which isn't AS> cheap. AS> Furthermore, Valentine, do you know for certain that these same problems AS> don't occur with Windows? Could it be that they _do_ occur, but Windows AS> does a good job of recovering quickly? This can be the issue. I found out that Linux also recovers from this "hanging" after solid amount of time (say, 5 minutes). The most interesting thing is that file you ried to copy is at the very end received successfully. Windows can recover from this more quickly but since hardware is the same I think it should be possible to implement the same recovery procedure on Linux. Also (it's a mere observation, I didn't do any measurements etc.) Windows copies files faster than Linux (I mean, at real USB 2.0 speed, when transfer rate in my Linux system is usually about 700-800 KB/sec, although /pric/bus/usb/devices says usb-storage is conected to USB 2.0 controller (Spd=480) not 1.1). I read somewhere that problem may be due to clock resync in USB controller and it can be "cured" with external USB hub plugged between the Flash stick and USB port. I didn't have the time to check it yet. -- Best regards, Valentine mailto:[EMAIL PROTECTED] ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_ide95&alloc_id396&op=click _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
