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

[Tom Sightler <ttsig tuxyturvy com>]

On Fri, 2005-10-07 at 10:24 -0400, Brian Long wrote:
> On Fri, 2005-10-07 at 06:20 -0500, Ed Wilts wrote:
> 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).

With the most recent updates I've had no trouble with my dm-multipath
setup on our EMC Clariion CX700 so it's definitely looking promising.

So far the only major shortcoming that I've found is no Boot-from-SAN
support with dm-multipath (well, not completely true, just no easy way
to use dm-multipath on the root volume).  Basically they just need to
get dm-multipath into initrd and even this issue will likely go away.

Still, it's a very young technology from a availability and deployment
perspective, it will take several months of proof in the field before I
will consider it on my most critical systems.

Later,
Tom