From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Lord Date: Tue, 20 Apr 2010 04:31:09 +0000 Subject: Re: System hangs when using USB 3.0 HD with on Ubuntu Message-Id: <4BCD2E0D.80305@pobox.com> List-Id: References: <20100416182026.GA10023@xanatos> <20100419211539.GB4245@xanatos> <4BCCF497.70504@pobox.com> In-Reply-To: <4BCCF497.70504@pobox.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Sarah Sharp Cc: Alan Stern , Jonas Schwertfeger , Dinh.Nguyen@freescale.com, Sergei Shtylyov , James Bottomley , Kay Sievers , David Zeuthen , linux-hotplug@vger.kernel.org, linux-usb@vger.kernel.org, USB Storage List , Matthew Dharm , linux-scsi@vger.kernel.org, Lennart Poettering , Douglas Gilbert On 19/04/10 08:25 PM, Mark Lord wrote: > On 19/04/10 05:15 PM, Sarah Sharp wrote: >> Updated description >> ------------------- >> >> Summary: >> >> The Buffalo USB3 hard drive fails to mount after being sent an ATA_16 >> IDENTIFY command. It does not fail when the device is connected via a >> USB 2.0 cable and the same command is sent. >> >> Details: >> >> There seems to be an issue with how the Buffalo USB3 hard drive handles >> the SCSI ATA pass through commands. We found this issue with the Linux >> userspace program hdparm, using the Ubuntu Linux Karmic distribution. >> The device responds correctly to an IDENTIFY DEVICE via the ATA_12 >> tunnel, but it responds with a Phase Error when it's sent an IDENTIFY >> DEVICE via the ATA_16 tunnel, and then stalls. > .. > > I hsven't gone away or anything -- still reading mostly every word of > this thread. > I haven't done anything further here because I really don't understand > the whole story. Sarah's latest summary (above) helps a lot, though. > > But I'm not sure what, if anything I (hdparm) can do differently to help > here. > > Can anyone out there send me one of these gadgets? > > Oh wait.. that wouldn't be terribly useful, I suppose, > since I also don't have any newfangled USB3 host gear. .. Okay, apparently the shop around the corner has some $25 USB3 interface boards for PCIe, and also some for ExpressCard on my notebooks. Now I just need one of the buggy USB3/SATA bridges to test/debug with. I'm not willing to spend much of my own money on something known to be buggy though. Anyone out there got one they could loan? Cheers -- Mark Lord Real-Time Remedies Inc. mlord@pobox.com