Comment 4 for bug 1205344

http://logs.openstack.org/41/38841/2/gate/gate-tempest-devstack-vm-full/36336/

- The volume reported as 'in-use' (2013-07-27 03:38:42)
- The host system has a syslog entry about the iSCSI initiator attachment as sda (Jul 27 03:38:40)
- The volume not visible on the guest even after 400 sec wait (2013-07-27 03:38:54 .. 2013-07-27 03:45:33)

The issue cannot be fixed and/or workaround on tempest side.
My attempt was based on the guest system may need several ms to realize it has a new device.

This is very likely a nova issue or an issue in a component related to nova.