Device timeouts(?) with LSI SAS3008 on mpr(4)

[Steven Hartland]

Actually not, it could indicate a design problem with the midplane / 
backplane is the cause of the issue.

We've had a number of Supermicro and Dell chassis when used in 
combination with 6Gbps+ devices particularly SSD's that exhibit timeouts 
like you describe, all turned out to be a backplane issue.

We proved this in by connecting the drives direct to the controller with 
high quality cables eliminating the hotswap backplane, after which the 
timeouts stopped.

This is a PITA to test as power is supplied by the hotswap backplane, 
but I wouldn't recommend you look anywhere else till you've eliminated 
this as a potential cause.

     Regards
     Steve

On 08/07/2015 06:46, Yamagi Burmeister wrote:
> Hello Steven,
> since the issue occures on all 3 servers it's at least unlikely. But
> I'll see what I can do.
>
> Regards,
> Yamagi
>
> On Tue, 7 Jul 2015 17:42:44 +0100
> Steven Hartland <killing at multiplay.co.uk> wrote:
>
>> Have you eliminated the midplane / cabling as the issue as that's very
>> common.
>>