logically that would make sense that MSCS would be responsible for
everything.
however.... both nodes are able to see the storage but can only read
the drives when the respective controller is the active one.

both initiators have access to all the LUNs on the storage. both HBAs
have access to all LUNs

>
> It sounds like you're trying to persuade the DS400 to control your failove
r
> action. You're making a LUN available to one node, and when a failure occu
rs
> you're expecting the DS400 to switch ownership of that LUN to the other no
de
> so it can proceed. That's not what you want. You want both nodes to see an
d
> 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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