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Date:      Tue, 28 Jun 2011 00:06:33 +0200
From:      Leon =?iso-8859-15?Q?Me=DFner?= <l.messner@physik.tu-berlin.de>
To:        freebsd-questions@freebsd.org
Subject:   Re: SAS controller for FreeBSD
Message-ID:  <20110627220633.GH74606@emmi.physik-pool.tu-berlin.de>
In-Reply-To: <alpine.LFD.2.00.1106251625540.6821@nber7.nber.org>
References:  <alpine.LFD.2.00.1106241843120.22469@nber7.nber.org> <20110625153923.GG74606@emmi.physik-pool.tu-berlin.de> <alpine.LFD.2.00.1106251625540.6821@nber7.nber.org>

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On Sat, Jun 25, 2011 at 04:47:19PM -0400, Daniel Feenberg wrote:
> 
> 
> On Sat, 25 Jun 2011, Leon Me▀ner wrote:
> 
> > On Fri, Jun 24, 2011 at 06:51:37PM -0400, Daniel Feenberg wrote:
> 
> ...
> >>
> >> There are some SAS RAID controllers that claim to support FreeBSD but I
> >> can't tell if their JBOD mode is a true pass-through, or leaves some
> >> undesirable junk on the disk.
> >>
> >> So does anyone have a recomendation for a reasonably priced SAS
> >> controller? We aren't looking for anything fancy at this point.
> >
> > We are using two of the LSI SAS2008 based cards here and have no
> > problems with them. Be sure to run a recent STABLE as the mps driver is
> > relatively new. Speed and reliability are very nice. The only thing we
> 
> February of this year:
> 
>    http://lists.freebsd.org/pipermail/freebsd-scsi/2011-February/004784.html
> 
> > are missing is IR-Firmware support but if you only want a HBA this won't
> > bother you.
> 
> If I search the LSI website for "SAS2008" the first hit includes a 
> description of the chipset features, including the bullet point
> 
>    * Integrated RAID
> 
> All the cards on the LSI website that I can find using the SAS2008 chipset 
> include the sentence "Integrated RAID avoids additional host CPU overhead" 
> in their brief description, even the ones labeled "HBA". Apparently the 
> FreeBSD driver does not include an interface to the RAID capability, but 
> it seems that the chipset still provides it. I suppose this still avoids 
> controller lock in, so it should be satisfactory. Can I ask what model you 
> have?

We are running the SAS 9200-8e and the onboard version on the X8SI6-F
Mainboard from Supermicro. It was possible to Flash IT-Firmware on
Systems that had been delivered with IR-Firmware. I think they removed
that feature from their flashing utility.

cheers,
Leon



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