[Discuss] Linux on Lenovo P70 -- data corruption

[rlk at alum.mit.edu (Robert Krawitz)]

On Mon, 4 Sep 2017 16:45:43 -0400, Kent Borg wrote:
> On 09/04/2017 04:08 PM, Robert Krawitz wrote:
>> On Mon, 4 Sep 2017 15:56:06 -0400, Kent Borg wrote:
>>> On 09/04/2017 02:10 PM, Robert Krawitz wrote:
>>>> On Mon, 4 Sep 2017 13:59:48 -0400, Frank DiPrete wrote:
>>>>> What us the NIC in the laptop ?
>>>>> I've had this problem before using the open source driver for a network
>>>>> adapter.
>>>>> (trying to remember which one)
>>>> But this appears to also happen over the loopback interface.
>>> If you can reliably get it to mess up, see what reliably never messes up, squeeze between the two.
>> I reproduced the problem under Windows, with exactly the same
>> symptoms.  But it was considerably harder, perhaps because ssh/scp
>> under Cygwin is a lot slower than it is on Linux, and it did appear
>> that the rate of data transfer affected how frequently it failed.
>>
>> I did it by copying a ~36 GB file repeatedly from a known good Linux
>> host to the laptop, while running a load in the background (on Linux,
>> multiple copies of glxgears with the option to turn off sync, on
>> Windows, by running prime95 along with an OpenGL demo in the
>> background).  It took me about 5 tries on Windows to finally get a
>> failure, but I did, with exactly the same pattern as under Linux.
>
> Congratulations! Sounds like a hardware problem. (Unless it is a problem in scp!)

Not likely, since I've seen it with ftp and socat.  This has all the
earmarks of a hardware problem.
-- 
Robert Krawitz                                     <rlk at alum.mit.edu>

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