Hi Many thanks for your response and the suggestion. I think my memory may be playing tricks with me, I definitely deployed a few 4.3 systems with self hosted engines and I have one 4.4 environment with a self hosted engine but I cannot remember how long ago it was deployed, the other 4.4 deployments may well have had the engine residing on a dedicated host or VM - too many deployments to remember them all clearly :-) Anyway, I did manage to fix (work around?) the problem, almost before you send your response. I worked out that the productID and vendorID are merely used for reporting the details of the discovered FC LUN, by removing any reference to them in /usr/share/ovirt-hosted-engine-setup/plugins/gr-he-ansiblesetup/core/storage_domain.py the deployment completed successfully. As far as I know, the reporting from the storage has not changed, running multipath -v2 -l never showed a vendorID or productID (assuming it is the multipath command that is used to gather this info). Thanks for the help!! I will be back I am sure. If anyone has questions on PowerFlex/ScaleIO, don't be afraid to ask, it works a treat with oVirt/RHV/Oracle Linux KVM :-)