On Sat, 25 Jun 2011, Leon Meßner 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?
Thanks
Daniel Feenberg
cherio,
Leon
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