LSI 9240-4i 4K alignment

George Kontostanos gkontos.mail at
Thu Aug 16 17:53:27 UTC 2012

On Thu, Aug 16, 2012 at 7:26 PM, Steven Hartland
<killing at> wrote:
> ----- Original Message ----- From: "George Kontostanos"
> <gkontos.mail at>
>> I know. The problem with that controller is that for some reason it
>> doesn't like gpart. I have gnoped the drives directly and it seems to
>> be working so far.

> It still really smells like something higher up the layers than the
> controller tbh.

We have tried many combinations with different drives. Any other suggestions?

>>> In addition to this we're running LSI 2008 based controllers here on
>>> 8.2-RELEASE + manually merged in mps driver with ZFS just fine. They
>>> aren't running 4k aligned but they are working well.
>> Right, they fall under the mps driver like the following:
>> LSI Logic SAS2004 (4 Port SAS)
>> LSI Logic SAS2008 (8 Port SAS)
>> LSI Logic SAS2108 (8 Port SAS)
>> LSI Logic SAS2116 (16 Port SAS)
>> LSI Logic SAS2208 (8 Port SAS)
> Confused as your 9240-4i is a SAS2008 based card so you "shouldnt" be
> seeing any difference as it should be supported just fine under mps.
> The cards we have here are 9211-8i if that helps.

You are right, the chip specs say: LSISAS2108 RAID-on-Chip

The drives are identified as mfisyspd0, mfisyspd1, etc.

>    Regards
>    Steve
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George Kontostanos
Aicom telecoms ltd

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