QLogic HBAs+EMC AX100 SAN

[John Nielsen]

On Monday 07 January 2008 04:50:35 pm Lan Tran wrote:
> John Nielsen wrote:
> > Quoting Gary Palmer <gpalmer at freebsd.org>:
> >> On Mon, Jan 07, 2008 at 03:23:35PM -0500, Lan Tran wrote:
> >>> Next question is can I do multipath with ISP driver?   The EMC AX100
> >>> has
> >>> two "processors" for redundancy.
> >>
> >> man geom_fox
> >
> > geom_multipath (by mjacob as it happens) is more complete and
> > user-friendly and is/will be included with FreeBSD 7. See this (short)
> > thread:
> > http://groups.google.com/group/bsdmailinglist/browse_thread/thread/c1a3
> >2120f238ca8c/0f58dd01c5ef0b16
>
> Thanks for the thread.  That is a good news.  I'll wait for 7.0-R to try
> geom_multipath or is it included in 7.0-PRE already?

It's been in 7-CURRENT/BETA/PRE for quite a while; I just didn't want to 
imply that 7.0-RELEASE had already happened.

If you're already running 7.0-PRE then have a look at "man gmultipath". Keep 
in mind that this is a "regular" GEOM class and uses the last sector of the 
provider to store its own metadata, so Scott's comments about geom_fox as 
far as interoperability goes still apply (other OSes know nothing about 
GEOM). The man page does a good job of explaining how the active/passive 
status works, so you can be your own judge of whether that meets your 
expectations.

JN