On Thu, May 29, 2014 at 07:12:24AM -0500, Johnny Hughes wrote: > On 05/28/2014 10:52 PM, Fred Smith wrote: > > I didn't do that, but what I did do was download a nightly build > > for Fedora 21, a live CD image, burn it to a disc and boot that. > > One would think it has a recent kernel (I neglected to look while > > it was running to find out what kernel it was). > > > > so I ran a bunch of commands to copy stuff to and from it, and > > while it took a few minutes, it also failed in more or less the same > > way. I'd guess that means that whatever the bug is, it's not fixed > > in Linux, yet. > > > > :( :( :( > > > Johnny: I believe that is the only USB3 device here. Did you see my posting a few days ago that said it appears to work as a USB2 device? At least I beat on it for a good while and it didn't fail, then. > So, do you have any other external USB 3 drives laying around to test with? > > It would be good to test if this is a problem with more than just the > one external RAID box that you are using. > > How long does this usually take to get the error and what kind of writes > access does it take to cause it to fail .. I have 2 of those exact > boards in production and a USB3 drive I can plug in and test. I would > like to know if this is specific to individual drives or an overall USB3 > problem as I recommend those boards to people now. (yeah, I know... you may recall I asked about good boards and you said you'd had good luck with that one, so in lieu of other suggestions I got one. So far it's been great!) What I've done to make it fail is find a file (or a tree of directories and files) of several gigabytes and copy it to the device repeatedly until it fails, removing the file from the device between copies. It usually takes only 2-3 such copies to see the failure. FYI, the Fedora nightly build live CD (the Mate one) I ran last night also suffered a kernel error right after the USB failure (I suspect they may be related, but don't know with any certainty) and auto-generated a bugzilla report, if you think it may be interesting, it's number 1102452 which has, as I now see, been closed as a duplicate of 1096572.. Fred -- ---- Fred Smith -- fredex at fcshome.stoneham.ma.us ----------------------------- The Lord is like a strong tower. Those who do what is right can run to him for safety. --------------------------- Proverbs 18:10 (niv) -----------------------------