On Sun, 15 Aug 2010, Dennis Nezic wrote: > > As I said, your issue is very possible a hardware related, so > > recommend to do the compared(windows vs. linux) tests on > > same machine for ruling out hardware problem. > > I can't install MSWindows on my machine (for many reasons, money being > a big one), and it will take a little time before I get linux installed > on that other machine. > > However, I don't quite understand how you figure it's a hardware issue. > The device *clearly* works. Unless you think my laptop's USB controller > is broken? Which I *really* don't think it is, since I use USB (2.0) > storage devices on here all the time. Moreover, we just saw how a > simple /software/ modification yielded a quite drastic change > (reduction) in performance. Maybe the laptop's USB controller _and_ the storage device are both a little bit out-of-spec. Just enough so that they don't work with each other but they do work with other hardware. And just enough so that a slight variation in timing (introduced by a software change) can have a big effect on performance. Hardware problems aren't always clear-cut. For example: At home I have a desktop computer that won't work with a particular USB-IDE drive. If I replace the drive with a different mass-storage device, everything works. If I keep the original drive but replace the USB cable, everything works. And if I use the same drive and cable but plug them into my laptop instead of the desktop computer, everything works. So which component is at fault? 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
