Hi list, I'm working on a system running on oVirt 3.6 and the Engine is reporting the warning "The Hosted Engine Storage Domain doesn't exist. It should be imported into the setup." repeatedly in the Events tab into the Admin Portal. I've read into the list that Hosted Engine Storage Domain should be imported automatically into the setup during the upgrade to 3.6 (original setup was on 3.5), but this not happened while the HostedEngine is correctly visible into the VM tab after the upgrade. The Hosted Engine Storage Domain is on a dedicated gluster volume but considering that, if I remember correctly, oVirt 3.5 at that time did not support gluster as a backend for the HostedEngine at that time I had installed the engine using gluster's NFS server using 'localhost:/hosted-engine' as a mount point. Currently on every nodes I can read into the log of the ovirt-hosted-engine-ha agent the following lines: MainThread::INFO::2017-03-17 14:04:17,773::hosted_engine::462::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine::(start_monitoring) Current state EngineUp (score: 3400) MainThread::INFO::2017-03-17 14:04:17,774::hosted_engine::467::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine::(start_monitoring) Best remote host virtnode-0-1 (id: 2 , score: 3400) MainThread::INFO::2017-03-17 14:04:27,956::hosted_engine::613::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine::(_initialize_vdsm) Initializing VDSM MainThread::INFO::2017-03-17 14:04:28,055::hosted_engine::658::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine::(_initialize_storage_images) Connecting the storage MainThread::INFO::2017-03-17 14:04:28,078::storage_server::218::ovirt_hosted_engine_ha.lib.storage_server.StorageServer::(connect_storage_server) Connecting storage server MainThread::INFO::2017-03-17 14:04:28,278::storage_server::222::ovirt_hosted_engine_ha.lib.storage_server.StorageServer::(connect_storage_server) Connecting storage server MainThread::INFO::2017-03-17 14:04:28,398::storage_server::230::ovirt_hosted_engine_ha.lib.storage_server.StorageServer::(connect_storage_server) Refreshing the storage domain MainThread::INFO::2017-03-17 14:04:28,822::hosted_engine::685::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine::(_initialize_storage_images) Preparing images MainThread::INFO::2017-03-17 14:04:28,822::image::126::ovirt_hosted_engine_ha.lib.image.Image::(prepare_images) Preparing images MainThread::INFO::2017-03-17 14:04:29,308::hosted_engine::688::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine::(_initialize_storage_images) Reloading vm.conf from the shared storage domain MainThread::INFO::2017-03-17 14:04:29,309::config::206::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine.config::(refresh_local_conf_file) Trying to get a fresher copy of vm configuration from the OVF_STORE MainThread::WARNING::2017-03-17 14:04:29,567::ovf_store::104::ovirt_hosted_engine_ha.lib.ovf.ovf_store.OVFStore::(scan) Unable to find OVF_STORE MainThread::ERROR::2017-03-17 14:04:29,691::config::235::ovirt_hosted_engine_ha.agent.hosted_engine.HostedEngine.config::(refresh_local_conf_file) Unable to get vm.conf from O VF_STORE, falling back to initial vm.conf ...and the following lines into the logfile engine.log inside the Hosted Engine: 2017-03-16 07:36:28,087 INFO [org.ovirt.engine.core.bll.ImportHostedEngineStorageDomainCommand] (org.ovirt.thread.pool-8-thread-38) [236d315c] Lock Acquired to object 'EngineLock:{exclusiveLocks='[]', sharedLocks='null'}' 2017-03-16 07:36:28,115 WARN [org.ovirt.engine.core.bll.ImportHostedEngineStorageDomainCommand] (org.ovirt.thread.pool-8-thread-38) [236d315c] CanDoAction of action 'ImportHostedEngineStorageDomain' failed for user SYSTEM. Reasons: VAR__ACTION__ADD,VAR__TYPE__STORAGE__DOMAIN,ACTION_TYPE_FAILED_STORAGE_DOMAIN_NOT_EXIST 2017-03-16 07:36:28,116 INFO [org.ovirt.engine.core.bll.ImportHostedEngineStorageDomainCommand] (org.ovirt.thread.pool-8-thread-38) [236d315c] Lock freed to object 'EngineLock:{exclusiveLocks='[]', sharedLocks='null'}' How can I safely import the Hosted Engine Storage Domain into my setup? In this situation is safe to upgrade to oVirt 4.0? Greetings, Paolo