On Aug 3, 2015, at 2:15 PM, Paul Mather <freebsd-li...@gromit.dlib.vt.edu> 
wrote:

> On Aug 3, 2015, at 12:17 PM, Jack Vogel <jfvo...@gmail.com> wrote:
>> 
>> Have you tried it on HEAD, and have you tried it on the same system with some
>> recent flavor of Linux?
> 
> No, and no.  It's a good idea, though.  I can try it this weekend, if I can 
> run each OS via a USB memstick.


Just to follow up on myself, I tried this external USB drive on a 
20150804-r286285 snapshot of FreeBSD/amd64 11-CURRENT on the same system, as 
well as under Ubuntu 15.04.

The 4 TB Western Digital My Book 1230 works under both those operating systems.

The drive is detected and works reliably when plugged in to a USB 2 port on 
either 11-CURRENT or Ubuntu 15.04.  It also works reliably when plugged in to a 
USB 3 port on either OS, however, it isn't always detected reliably under 
FreeBSD 11-CURRENT when unplugged and plugged in again (2 times out of 3 
attempts), but was detected every time without fail under Ubuntu 15.04.

So, it appears the hardware is okay; it seems the problem may lie with FreeBSD 
10.2.

Cheers,

Paul.


> 
> With this being such a commonplace drive, I'd hoped someone might pipe up and 
> say something along the lines of, "oh, you have to add USB quirk XYZ to get 
> that model working under FreeBSD."  No such luck, it seems.
> 
> Cheers,
> 
> Paul.
> 
>> 
>> 
>> Jack
>> 
>> 
>> On Mon, Aug 3, 2015 at 8:35 AM, Paul Mather 
>> <freebsd-li...@gromit.dlib.vt.edu <mailto:freebsd-li...@gromit.dlib.vt.edu>> 
>> wrote:
>> On Aug 3, 2015, at 11:09 AM, Alban Hertroys <haram...@gmail.com 
>> <mailto:haram...@gmail.com>> wrote:
>> 
>>> On 3 August 2015 at 15:01, Paul Mather <freebsd-li...@gromit.dlib.vt.edu 
>>> <mailto:freebsd-li...@gromit.dlib.vt.edu>> wrote:
>>>> On Aug 2, 2015, at 9:34 PM, Adam McDougall <mcdou...@egr.msu.edu 
>>>> <mailto:mcdou...@egr.msu.edu>> wrote:
>>>> 
>>>>> On 08/02/2015 21:22, Paul Mather wrote:
>>>>>> I have a 4TB external USB drive (Western Digital My Book 1230) that I am 
>>>>>> trying to use under FreeBSD/amd64 10.2 (10.2-PRERELEASE #0 r286052: Wed 
>>>>>> Jul 29 20:59:39 EDT 2015).  This system has a MSI 760GMA-P34 (FX) 
>>>>>> motherboard.
>>>>>> 
>>>>>> The drive probes unreliably when plugged in to a USB 3 port.  It 
>>>>>> reliably probes when plugged into a USB 2 port.  However, it works in 
>>>>>> neither cases.  Attempting to dd from the drive results in a "dd: 
>>>>>> /dev/da0: Invalid argument".
>>> 
>>> FYI: I had been experiencing the same with a 2 TB WD MyBook on OS X
>>> (Mavericks). The drive was being used for Time Machine backups, but it
>>> would at irregular intervals it would just 'disconnect' itself. My
>>> guess is that there's a firmware problem in the USB3 chip in those
>>> drives.
>>> 
>>> After trying to get the issue fixed for almost half a year I returned
>>> it and replaced it by a Seagate, which has been working flawlessly
>>> ever since.
>>> 
>>> I'm just saying, perhaps the problem isn't with FreeBSD but with the drive.
>> 
>> 
>> I'd love just to get to the "randomly disconnects" stage under FreeBSD at 
>> this point. :-)
>> 
>> Up to now, I have been unable to read ANY data off the drive under FreeBSD, 
>> either via USB 2 or USB 3. :-(
>> 
>> However, you have given me something to think about: does anyone know of a 4 
>> TB USB 2 or 3 drive that will work reliably under FreeBSD 10-STABLE right 
>> now?
>> 
>> Cheers,
>> 
>> Paul.
>> 
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