NuggetGTR
VMware Employee
VMware Employee

Well you will need to have RDMs in physical compatibility and the scsi controller configures with physical bus sharing, anyway if you want to cluster across boxes.

Also its worth noting and has caught me out when first moving to 5.1 is if your storage is presented as an active/active pathing. It will automatically configure round robin. unfortunately round robin is not supported with use on MSCS. and you will see terrible performance so they will have to be set to fixed. (vSphere 5.5 fixed this and round robin is supported for MSCS RDMs)

I don't think you will see or notice a performance difference making those 2 changes. its just better practice. vmxnet3 is specifically designed NIC and driver for visualization and the SCSI controller wont make too much of a difference from what i've seen.

I have about 300 MSCS clusters in total running on one of my larger client sites, with differing configurations as we have moved through versions over the years.

but its always best to follow the current recommendations if possible.

Cheers

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