[OpenIndiana-discuss] 3x LSI 9211-8i controllers + direct attach backplane -- appear as on controller

[Rich]

That is indeed the expected behavior, speaking as someone with many
92xx controllers in Supermicro machines with mpxio enabled. :)

- Rich

On Wed, Nov 16, 2011 at 3:40 PM, Bill Sommerfeld
<sommerfeld at alum.mit.edu> wrote:
> On 11/16/11 12:30, Jason J. W. Williams wrote:
>> I just had a new server released to me using a SuperMicro SC216A (direct
>> attach backplane) chassis and 3x 9211-8i controllers loaded with 11.0 IT
>> firmware. I've confirmed the firmware is correct, what is strange is that
>> all of the drives are showing as being on one controller (c2) though the
>> LSI BIOS clearly shows the drives scattered across the three controllers:
>>
>> https://gist.github.com/c9b15104cbaebc640d6d
>>
>> Any insight on what's going would be very appreciated.
>
> This looks like multipathing (mpxio); if it's enabled, it attaches all disks
> to a virtual controller, with target names derived from the WWN of the targets.
>
> under the covers, these get mapped to whichever physical controller(s) have a
> path to the disk.  I've only used this with fiberchannel but I believe it's
> also available with SAS.
>
> if you don't actually have multiple paths to each disk you can generally turn
> it off and have small-integer target numbers in the disk names.
>
>                                                - Bill
>
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