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  • 1.  Recommended SCSI Controller for VM with MSCS running one Node

    Posted Jun 18, 2015 10:31 PM

    I have a VM running MSCS (one node only). It has 4 disk and one LSI scsi controller. VM is very IO intensive. Would adding a Paravirtual SCSI controller be recommended?

    *Note: when the server was virtualized, MSCS was never removed the reason why it is running on one node. VM is on W2K3 64bit



  • 2.  RE: Recommended SCSI Controller for VM with MSCS running one Node

    Posted Jun 19, 2015 01:14 AM

    Paravirtual is only supported on MSCS clusters on vSphere 6, but since your cluster is a unique node cluster, I think you can use PVSCSI without problems.

    vSphere 6.0 Storage Features Part 3: MSCS Improvements | CormacHogan.com

    3. PVSCSI support for MSCS

    This has been a request I’ve heard a number of times. PVSCSI, or ParaVirtual SCSI Bus Adapters can provide even more performance than other virtual SCSI bus adapters in certain conditions/workloads. PVSCSI adapters are now supported as a virtual adapter for virtual machines that are configured as MSCS nodes.

    VMware KB: Configuring disks to use VMware Paravirtual SCSI (PVSCSI) adapters

    • If a virtual machine uses PVSCSI, it cannot be part of a Microsoft Cluster Server (MSCS) cluster.