Re: HP EVA + Qlogic HBA + failover

[Ed Wilts <ewilts ewilts org>]

On Thu, Apr 21, 2005 at 11:47:20AM -0400, Frank, Ryan wrote:
> I use the built-in RAID tools for Linux to accomplish this... Using
> MDADM I am able to create devices using raid-level 'multipath'.  Looks
> like this...

Not with an HP EVA you aren't.  The md multipath driver requires
active/active controllers which the current EVAs aren't.  With the EVAs
shipping next month, you can probably do this.

> This solution has worked great for me... 

With an EVA, if you cat /proc/mdstat, you'll see that the the mddriver
threw out the non-active controller at boot time.  If figures that if
it's dead at boot, it's not coming back.  That's a bad guess, but that's
the way it works in taroon today.

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