From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Lord Date: Tue, 20 Apr 2010 00:25:59 +0000 Subject: Re: System hangs when using USB 3.0 HD with on Ubuntu Message-Id: <4BCCF497.70504@pobox.com> List-Id: References: <20100416182026.GA10023@xanatos> <20100419211539.GB4245@xanatos> In-Reply-To: <20100419211539.GB4245@xanatos> 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 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. Suggestions? -- Mark Lord Real-Time Remedies Inc. mlord@pobox.com