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@olivierlambert

That did it

Tested with both the LSI and Paravirtual - both succeeded

Thanks

@Danp Got this from a ticket for a similar issue

Migrating from VMFS5 (whatever the underlying storage is) : can do warm and cold migration
Migrating from VMFS6 (whatever the underlying storage is) : can do cold migration
Migrating from NFS datastore : can do warm and cold migration
Migrating from VSAN: will need to download the disk completly and then push it to XCP

The version of the esxi is not relevant as long as its 5+, but ESXI6.5 and following are using VMFS6 by default

Ended up creating an NFS datastore, as it had similar issues even though the datastore was VMFS5