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I have a two server failover cluster, and for various reasons - they're on mismatched hardware.

One has Emulex HBAs installed, the other Qlogic.

I'd be twitchy about using two different makes/models of card for multipathing within a box. I'm therefore a bit uncomfortable doing it in a shared storage failover cluster.

Is there a particular reason why this might be a bad (or good?) idea, or am I just being unduly concerned?

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You don't really mention enough detail at all but I'd have zero concerns about mixing Emulex and QLogic - in fact in our highest-availability systems I consciously do this kind of thing, even with Ethernet ports. The reason being that if the driver for one manufacturer's card suddenly dies or develops a bug then the other driver should carry on in many cases.

So no, I'd not be worried and so long as you get the latest drivers I actually think it's a good thing.

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    Nope, that's perfect. Spot on. Would you mix within a host or just within the cluster?
    – Sobrique
    Nov 6, 2015 at 10:01
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    Either/both - I'm old enough to remember several situations where a driver has caused some form of outage, splitting this risk is usually a good idea.
    – Chopper3
    Nov 6, 2015 at 10:52

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