This bug has been copied from bug #480843 and has been proposed to be backported to 5.3 z-stream (EUS).
Fix built into xen-3.0.3-80.el5_3.1
sorry !! please ignore the comment #11. it should paste to Bug 488698 scsi backend: make sure data is actually written to disk
How did you reboot the host in step 5? Did you do a clean reboot, or did you push the power button? If you pushed the power button, how long did you wait?
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2009-0401.html