Hi, I'm having trouble with my hosted engine setup (v4.0) and could use some help. The problem I'm having is that whenever I try to add additional hosts to the setup via webadmin, the operation fails due to storage-related issues. webadmin shows the following error messages: "Host <host name> cannot access the Storage Domain(s) hosted_storage attached to the Data Center Default. Setting Host state to Non-Operational. Failed to connect Host ovirt-node-1 to Storage Pool Default" The VDSM log from the host shows the following error message: "Thread-18::ERROR::2017-07-17 13:01:11,483::sdc::146:: Storage.StorageDomainCache::(_findDomain) domain ca044720-e5cf-40a8-8b21-57a17026db7c not found Traceback (most recent call last): File "/usr/share/vdsm/storage/sdc.py", line 144, in _findDomain dom = findMethod(sdUUID) File "/usr/share/vdsm/storage/sdc.py", line 174, in _findUnfetchedDomain raise se.StorageDomainDoesNotExist(sdUUID) StorageDomainDoesNotExist: Storage domain does not exist: (u'ca044720-e5cf-40a8-8b21-57a17026db7c',)" The engine log shows the following error messages: "2017-07-17 18:32:11,409 ERROR [org.ovirt.engine.core.vdsbroker.irsbroker.IrsProxyData] (org.ovirt.thread.pool-6-thread-34) [] Domain 'ca044720-e5cf-40a8-8b21-57a17026db7c:hosted_storage' was reported with error code '358' 2017-07-17 18:32:11,410 ERROR [org.ovirt.engine.core.bll.InitVdsOnUpCommand] (org.ovirt.thread.pool-6-thread-34) [] Storage Domain 'hosted_storage' of pool 'Default' is in problem in host 'ovirt-node-1' 2017-07-17 18:32:11,487 ERROR [org.ovirt.engine.core.dal. dbbroker.auditloghandling.AuditLogDirector] (org.ovirt.thread.pool-6-thread-34) [] Correlation ID: null, Call Stack: null, Custom Event ID: -1, Message: Host ovirt-node-1 reports about one of the Active Storage Domains as Problematic." I have ownership set to vdsm/kvm and full rwx rights enabled on both directories. I have successfully mounted both the master domain and the hosted_storage manually on one of the hosts I'm trying to add. I have attached the engine log and the VDSM log for that host. Could someone please help me figure out what's causing this? -Phillip Bailey