Sorry but the drive in question has valuable data on it and I feel I've been more than helpful by figuring out that the problem resides in the JMS539 USB3/SATA2 bridge controller. Not going back to it. The issue is trivial to reproduce. Just pick up a Mukii TIP-330U3-BK for $30 (Google Shopping) and you have a hands-on test case in your lab 100% certain to fail. At 10:49 AM 11/17/2011 -0500, Alan Stern wrote: >On Wed, 16 Nov 2011 starlight@xxxxxxxxxxx wrote: > >> Final detail: >> >> The fellow experiencing the identical problem with >> both Gentoo and mainline 3.1.1 reports that his >> failing USB3 enclosure reports itself as a >> JMicron USB3-to-SATA bridge: > >> The failure behavior is a perfect match to the WDC >> MyBook device here, which strongly suggests that >> WD is using this controller but as taken the extra >> effort to replace the device strings. >> >> If anyone else has a USB3 drive enclosure with >> this controller or a MyBook, it would be >> interesting to see if they can reproduce this >> issue. Be sure that 4K sectors are aligned for >> the test. Default partitions created with 'fdisk' >> are off by one sector and will slow it down, >> possibly enough to hide the bug. > >Can you capture a usbmon trace showing the problem? If we had some >idea of what was going wrong, that might help point people in the right >direction for fixing it. > >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
