Original issue: https://issues.redhat.com/browse/CNV-77645

Storage migrations from block disks with fractional sizes fail on some storage provider combinations such as ODF->hostpath provisioner.

Workaround:
One is able to directly use the kubevirt storage migration APIs to migrate to a custom created PVC, larger than the original's capacity:
https://kubevirt.io/user-guide/storage/volume_migration/