On my fully updated Fedora 18 ovirt test environment, one of my nodes refused to attach to the iSCSI domain where it was working before. My vdsm.log had these errors: storageRefresh::WARNING::2013-06-06 14:57:50,887::fileUtils::185::fileUtils::(createdir) Dir /rhev/data-center/hsm-tasks already exists Thread-18::DEBUG::2013-06-06 14:57:50,904::misc::84::Storage.Misc.excCmd::(<lambda>) FAILED: <err> = 'iscsiadm: Could not stat /var/lib/iscsi/nodes//,3260,-1/default to delete node: No such file or directory\n\niscsiadm: Error while adding record: encountered iSCSI database failure\n'; <rc> = 6 Thread-18::DEBUG::2013-06-06 14:57:50,905::misc::84::Storage.Misc.excCmd::(<lambda>) '/usr/bin/sudo -n /sbin/iscsiadm -m iface' (cwd None) Thread-18::DEBUG::2013-06-06 14:57:50,933::misc::84::Storage.Misc.excCmd::(<lambda>) SUCCESS: <err> = ''; <rc> = 0 Thread-18::ERROR::2013-06-06 14:57:50,933::hsm::2215::Storage.HSM::(connectStorageServer) Could not connect to storageServer Traceback (most recent call last): File "/usr/share/vdsm/storage/hsm.py", line 2211, in connectStorageServer conObj.connect() File "/usr/share/vdsm/storage/storageServer.py", line 341, in connect iscsi.addIscsiNode(self._iface, self._target, self._cred) File "/usr/share/vdsm/storage/iscsi.py", line 132, in addIscsiNode iscsiadm.node_new(iface.name, portalStr, targetName) File "/usr/share/vdsm/storage/iscsiadm.py", line 237, in node_new raise IscsiNodeError(rc, out, err) IscsiNodeError: (6, [], ['iscsiadm: Could not stat /var/lib/iscsi/nodes//,3260,-1/default to delete node: No such file or directory', '', 'iscsiadm: Error while adding record: encountered iSCSI database failure']) Rebooting didn't fix it. The problem was the config file in the iSCSI was empty: # find /var/lib/iscsi/ /var/lib/iscsi/ /var/lib/iscsi/nodes /var/lib/iscsi/nodes/iqn.1999-07.com.gurulabs:ovirt /var/lib/iscsi/nodes/iqn.1999-07.com.gurulabs:ovirt/10.100.0.14,3260 <-- empty /var/lib/iscsi/ifaces /var/lib/iscsi/slp /var/lib/iscsi/static /var/lib/iscsi/isns /var/lib/iscsi/send_targets This command fixed the problem rm -rf /var/lib/iscsi/nodes/* && reboot