Why using MTV to migrate VMs from RHV-M to OpenShift Virtualization is causing the disk sizes to use fully allocated size?

Solution Verified - Updated -

Issue

  • The disk was thin provisioned in Red Hat Virtualization (RHV). 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 RHV)

Environment

  • OpenShift Virtualization 4.12, 4.13.
  • Migration Toolkit for Virtualization (MTV) 2.4.

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