Does devlable support RedHat Linux 5.5 or later version?

Dear Guru,

Last time when I install ORACLE RAC with ASM, I have use udev to mapping the raw device. Someone told me that "devlable" is good tool to achieve that. But I can find the rpm package for Linux 5.5.

Look devlable only for x86 system? Am I right?

What is the different between: udev and devlable?

Thanks for any comments!
David Feng