[CentOS] Raw device gone after reboot (Centos 5.2)!!!

We are set up CENTOS 5.2 (X86) as our database server.  I created raw partitions and also put definition on /etc/sysconfig/rawdevices.
I can use "raw -qa" see raw partitions.  The wield things is after reboot /dev/raw is not exist any more.
 
Does anyone know how to fix it?
 
Thanks.


      _______________________________________________________________________________________________________
總會在某些時刻，突然想起舊情人？他 現在過得還好嗎？ 
http://sev.search.yahoo.net
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.centos.org/pipermail/centos/attachments/20080718/9c7b032f/attachment.html>