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Posted by Rob Turk on 04/12/06 21:40
<uspensky@gmail.com> wrote in message
news:1144859495.769566.133510@e56g2000cwe.googlegroups.com...
> We are trying to setup a system to system failover cluster using two
> nodes (x346) which each have a single hba running to seperate
> controllers on the DS400.
>
> For full redundnancy, IBM recommends dual path from each node but we
> dont need that. The current setup has two completly seperate paths. hba
> on node 1 to controller A on DS400 and hba on node 2 to controller B.
> If i take a controller offline, failover works fine to jumo to other
> controller and throw all resources to it's node but if i shutdown a
> node- the cluster loses all attached storage and DS400 is unaware to
> switch ownership to other controller.
>
> Is there a way to us mscs without dual path from each node?
> anotherwords... if either node or controller fails on a single path, we
> want the other path to become active.
It sounds like you're trying to persuade the DS400 to control your failover
action. You're making a LUN available to one node, and when a failure occurs
you're expecting the DS400 to switch ownership of that LUN to the other node
so it can proceed. That's not what you want. You want both nodes to see and
share the LUN(s) on the DS400 at all times. Mscs will then figure out
between the two nodes which one will access the LUN.
Rob
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