RELENG_8 / mpt / zpool Errors

[Matt Thyer]

On Sep 15, 2011 11:36 PM, "Tim Gustafson" <tjg at soe.ucsc.edu> wrote:
>
> > The SAS 2008 chip (SAS 6G) is the one that the FreeBSD mps driver has
> > problems with when used with port expanders. It's the older SAS 3G chip
> > that works OK with FreeBSD I think.
>
> I had crossed some wires earlier on in our discussion.
>
> We do have a SAS 2008 chip in the system already, but it's not the one
that's running the external disk boxes (and we are having no problem with
those drives).  The external disk boxes (the ones that are having the
problems) are connect through an LSI SAS 3801E, which is handled by the mpt
driver.  The mpt driver is what's giving us trouble right now.

Can you connect an enclosure to the SAS 2008 chip card you have now and
test?  I thought I had read about problems like yours with that chip on
FreeBSD when using such enclosures.