No, this is fresh storage(completely empty dir) and hosted-engine deploy 
creates V5 format domain in V4 DC, 
where master domain is also V4, I can see this in web available from local 
deploy VM. And storage is 
automatically renamed by deploy script.

-- 



 Wednesday, September 30, 2020, 19:09:18:

> Are you trying to use the same storage domain ?
> I hope not, as this is not supposed to be done like that.As far as I remember 
> - you need fresh storage.

> Best Regards,
> Strahil NIkolov






> В вторник, 29 септември 2020 г., 20:07:51 Гринуич+3, Sergey Kulikov 
> <ser...@msm.ru> написа: 






> 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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