On Wed, 15 Dec 2010, Jon 'maddog' Hall wrote: > Sarah and Alan, > > When I plug a USB3.0 drive that has multiple filesystems on it into the > USB3.0 port (either the one native to the W510 or the Transcend > ExpressCard Adapter) the multiple file systems show up as I expect them > to show up. > > However, when I chose to "safely remove the drive", all three > filesystems are unmounted (good), but about five-ten seconds later all > three filesystems are mounted again. Again, this happens both with the > native controller and the Transcend. This does not happen when I mount > the same USB3.0 drive under a USB2.0 port. Under USB2.0, only when I > remove the drive and re-insert it do the file systems remount. > > I think the USB2.0 behavior is proper, since people would want time > (after unmounting the filesystems and making the drive "safe to remove") > to be able to physically remove the cable/drive. > > This issue also does not appear with a USB 2.0 flash drive in the USB > 3.0 slot, nor does it appear with a single-filesystem USB 3.0 drive > plugged into a USB 3.0 port. Go ahead and collect a usbmon trace showing this behavior. Start the trace just before you click on "safely remove the drive", and end it when the filesystems reappear. 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
