> At 12:17 PM 11/22/2011 -0800, Sarah Sharp wrote: > >On Mon, Nov 14, 2011 at 04:51:43PM -0500, starlight@xxxxxxxxxxx wrote: > >> I'm experiencing a write-test failure with > >> a WDC MyBook 3TB. > > ... > > >> Briefly > >> > >> # dd bs=1024k if=/dev/zero of=test oflag=direct > >> dd: writing `test': Read-only file system > >> 10017+0 records in > >> 10016+0 records out > >> 10502537216 bytes (11 GB) copied, 132.675 s, 79.2 MB/s > > . > . > . > > >A patch was sent out last week for the 3.2 kernel > >that fixes an issue with the AsMedia host > >controller: > > > >d31c285 xhci: Set slot and ep0 flags for address > >command. > > > >It's marked for the stable kernel, so it should > >make it into 3.1 soon. > > > >It's possible that the problem lies with the > >combination of your AsMedia host controller and > >the device, not with the device alone. The patch > >that went in fixes a case where the xHCI driver > >feels the host controller bad data, but only if > >the device needs a reset (which some storage > >devices do when they decide they can't handle a > >particular SCSI command). So the MyBook might > >trigger the xHCI driver bug, but your new drive > >appears not to. > > > >Any chance you can try the latest kernel from > >Linus' tree and see if it fixes your problem? > > Tried the problem drive with the 3.2.0-rc2 kernel > and the 'dd' write test and it appears to work > fine. Let it run for only 50GB, so it wasn't > an exhaustive test. > > Also tried it with 3.1.1 and it worked > there as well, so it appears that whatever was > causing the MyBook to fail with the RH 6.0 > kernel was fixed before the recent patches. > > This implies that specific issue that the > Gentoo forum user experienced is different > than the one seen here since his test failed > with 3.1.1, even though the 'dmesg' output > was nearly identical. That was a Mukii drive > enclosure with a JMS539 USB3/SATA bridge > controller (the MyBook has a Symwave SW6316). > I'm posting to that thread in case he is > interested it testing latest USB3 > patches found in 3.2.0-rc2. And isn't this "try newer kernel" basically what I told you right at the begining ? M -- 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
