Re: How to configure: FCA 2214 HBA cards on HP DL380 clustersolution

[Ed Wilts <ewilts ewilts org>]

On Fri, Oct 07, 2005 at 10:24:15AM -0400, Brian Long wrote:
> On Fri, 2005-10-07 at 06:20 -0500, Ed Wilts wrote:
> > On Fri, Oct 07, 2005 at 09:23:43AM +0200, Arjan van de Ven wrote:
> > > 
> > > > Did the failover functionality make it into U2?
> > > 
> > > multipath made it into U2 yes. see the dm-multipath stuff
> > > (dm-multipath is more powerful than just underwater failover)
> > 
> > Sorry, I should have been more specific.  Did the Qlogic failover
> > driver make it into U2?  This is what I'm used to doing with RHEL 3 and
> > would be my preference until dm-multipath stabilizes.
> 
> Our storage team has been testing failover using pre-U2-beta dm-
> multipath RPMs for the past 2-3 months and it works well.  All I can say
> is give it a try and see if it works for you.  Primary storage is EMC
> DMX frames.
> 
> I don't know if the dm-multipath in U2 fixed an issue with EMC Clariion
> active/passive arrays, but it definitely works with active/active arrays
> and all kinds of failures (yank cables on host or shut down path on
> frame or in the middle of SAN).

I need it to work for EVA active/passive arrays.  Active/active is easy
but active/passive is much harder.

I'll have to download the driver from HP's web site instead.  I'm not
into "try it and see" for production servers.  Unfortunately, it's
always the edge cases that burn you down the road.  I'm not a testing
facility and do not have the ability to do weird and wonderful testing.
A brand new method of doing multipathing is not going into a large
production environment on my site.  

        .../Ed

-- 
Ed Wilts, RHCE
Mounds View, MN, USA
mailto:ewilts ewilts org
Member #1, Red Hat Community Ambassador Program