In Nutanix Unified Storage (specifically when using Volume Groups as iSCSI targets for VMs),IO performance scalingand redundancy acrossmultiple CVMsdepends on theiSCSI MPIO (Multi-Path I/O)feature configured within theguest OS.

According to the NUSA course:

“To leverage multiple CVMs for servicing IO requests to a volume group, MPIO must be configured in the guest operating system. MPIO allows the VM to establish multiple concurrent iSCSI sessions to the Nutanix cluster, balancing the load across available CVMs.”

Without MPIO, even if multiple CVMs host the VG target, the guest OS will typically establish asingle iSCSI sessionto one CVM at a time, limiting scalability and redundancy.

The virtual RAID controller in the guest OS (option A) has no impact on how iSCSI paths are handled at the network level.

Flash mode (option C) only affects local performance caching and does not provide multi-path IO.

Configuring multiple vDisks in a VG (option D) improves storage organization but does not automatically enable multi-path IO to different CVMs.

Thus, the administrator mustenable iSCSI MPIO in the guest OSto ensure the VM can leverage multiple CVMs for IO operations.