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Description of problem:customer restarted services/rebooted 1 compute node and now instances won't boot , issue is that the volumes attached were errored. the solution to this issue is to dettach them and re-attach so the acls are re-created in targetcli. The only problem is root volumes can not be detached . Need to figure out how to detach the root volume or get the acl back so the root volume works and the instance can boot. ###comment 10 suggest db hack to detach volume , however this didn't seem to work. https://bugs.launchpad.net/nova/+bug/1396965 Version-Release number of selected component (if applicable): openstack-cinder-2014.2.3-3.el7.noarch