Comment 5 for bug 192080

Not stopping iSCSI on shutdown doesn't actually fix the problem... We need to make sure that the iSCSI volumes are unmounted and then iSCSI is shut down properly.

If you watch the shutdown process, you see that all remaining processes get terminated before filesystems are unmounted. Unfortunately iscsid is one of the processes that gets killed. Result is the system hangs on shutdown...

Note that Debian has all the same problems... ;) Ask me how I know...

Now that I've done some more hammering away on this I can confirm that networking does indeed come up properly before iSCSI is started, as udev discovers the devices. I can also confirm that boot time filesystem checks are working properly. And yes, mounting iscsi volumes at the same time as everything else is perfectly fine... :)