well, rawdevices aren't directly supported on OEL 5.x. So there must be some tricks executed to allow a database to run on these. This was a requirement from the client prior to the upgrade to 11g and r12.
Note Linux 2.6 Kernel Deprecation of Raw Devices [ID 357492.1] instructs how to setup the environment ("Script to Migrate Raw to Block Devices")
In a nutshell:
- you create the /etc/sysconfig/rawdevices since there isn't one in OEL 5.x;
- you create symbolink links (in the note using a perl script which reads theto the devices with /dev/raw/raw<number> names;
- and voilá.
2 Problems:
1 - if you're installing a RAC (like I am), the OUI doesn't support this method. So you have to get another solutions (we used OCFS2 :http://www.oracle-base.com/articles/linux/OCFS2OnLinux.php);
2 - every time your node reboots, you must create the symbolic links again. They are not persistent. This is quite annoying.
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