From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jonas Schwertfeger Date: Fri, 02 Apr 2010 12:40:34 +0000 Subject: Re: System hangs when using USB 3.0 HD with on Ubuntu Message-Id: List-Id: References: <4BB37454.8070808@interlog.com> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: Kay Sievers Cc: Alan Stern , Douglas Gilbert , David Zeuthen , linux-hotplug@vger.kernel.org, Sarah Sharp , linux-usb@vger.kernel.org, USB Storage List , Matthew Dharm , linux-scsi@vger.kernel.org, Lennart Poettering On Thu, Apr 1, 2010 at 4:05 PM, Kay Sievers wrote: >> Since the drive doesn't even show up as a block device when connected >> to the USB 3.0 port I can't run that command for the device directly. > > That means it does not show up, or it disappears after something is > trying to do something with it. If it does not appear at all, we don't > need to look in userspace, I guess. :) I assume it is there for a very brief moment but then disappears. > What are your rules trying to do with hdparm on the drive, that seems > rather odd to apply to a USB device: > =A0RUN '/lib/udev/hdparm' /lib/udev/rules.d/85-hdparm.rules:2 Why would you think so? From the hdparm man page: "Many newer (2008 and later) USB drive enclosures now also support "SAT" (SCSI-ATA Command Translation) and therefore may also work with hdparm." -Jonas