MFI driver issues

[Andrew Boyer]

I don't believe it's enough to compare the chip names (SAS2008, SAS2108, etc.).  The mps driver advertises support for a list of SAS2108 devices, but the SAS2108 chips I have access to (in MegaRAID SAS9261-8i controllers) report PCI IDs that are only supported by MFI.

My discussions with LSI support led me to believe that the claim of 2108 support in mps is incorrect but I've never confirmed that with anyone here.

-Andrew

On Mar 2, 2011, at 12:36 PM, Erich Weiler wrote:

>> I guess it would be most useful if I could somehow force MFI to be used on my boot disk as it is now, but use MPS on my 24 JBOD disks coming from the Perc H800 SAS controller...?  They are JBOD because I have them roped into a ZFS filesystem.
> 
> I just checked and the Perc H800 uses the LSI SAS2108 chipset, which in theory is supposed to be picked up by the MPS driver, according to this web page:
> 
> http://leaf.dragonflybsd.org/cgi/web-man/?command=mps&section=ANY
> 
> but instead it is picked up by the MFI driver...?  What gives?  ;)  Is it that the MPS driver *and* the MFI driver both support the LSI SAS2108 chipset, but the MFI driver checks first during boot, so it wins?
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Andrew Boyer	aboyer at averesystems.com