Hello, I'm trying to update our hosted-engine ovirt to version 4.4 from 4.3.10 
and everything goes fine until 
hosted-engine --deploy tries to add new hosted_storage domain, we have NFS 
storage domains, and it 
fails with error:

[ INFO  ] TASK [ovirt.hosted_engine_setup : Activate storage domain]
[ ERROR ] ovirtsdk4.Error: Fault reason is "Operation Failed". Fault detail is 
"[Domain format is different from master storage domain format]". HTTP response 
code is 400.
[ ERROR ] fatal: [localhost]: FAILED! => {"changed": false, "msg": "Fault 
reason is \"Operation Failed\". Fault detail is \"[Domain format is different 
from master storage domain format]\". HTTP response code is 400."}

It looks like storage domains in data center should have been upgraded to V5 
when DC and cluster 
compatibility version was updated to 4.3, but looks like it was implemented in 
ovirt 4.3.3 and this 
setup was updated from 4.2 to 4.3 before 4.3.3 was released, so I ended up with 
4.3 DCs and clusters 
with V4 storage domain format.
Is there any way to convert V4 to V5 (there are running VMs on them) to be able 
upgrade to 4.4?

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