This bug has been copied from bug #515566 and has been proposed to be backported to 5.5 z-stream (EUS).
udev-095-14.21.el5_5.1
Technical note added. If any revisions are required, please edit the "Technical Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. New Contents: Previously, cciss devices did not have an entry in the udev database. This was caused by the fact that these devices do not provide information in the /sys file system, making it hard to create persistent symbolic links in /dev/disk. With this update, the scsi_id utility is used to query the ID of cciss devices, so that udev can create the database entries as expected.
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-2010-0593.html