Why using MTV to migrate VMs from VMware to OpenShift Virtualization is causing the disk sizes to use fully allocated size with NetApp Storage?

Solution Verified - Updated -

Issue

  • The disk was thin provisioned in Vmware vSphere. However, after importing into OpenShift Virtualization using Migration Toolkit for Virtualization (MTV), the disk in the imported VM is using fully allocated size (virtual size in vSphere) when using NetApp storage devices.
  • No same issue was not encountered with other storage devices.

Environment

  • OpenShift Virtualization 4.x
  • Migration Toolkit for Virtualization (MTV) 2.x
  • NetApp ontap-nas Storage with Trident CSI

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