Hi Lei, I was facing a similar issue with nova-volume on essex, so I'm not sure if this can be useful to you ...
Where are you looking for errors? I found volume attach errors at nova-compute.log of node where instance is running I hope this help you Alberto _______________________________________________ Mailing list: https://launchpad.net/~openstack Post to : openstack@lists.launchpad.net Unsubscribe : https://launchpad.net/~openstack More help : https://help.launchpad.net/ListHelp
