Oracle RAC without Sun Cluster?

Hello

We are about to design an architecture based on Oracle 10 g with RAC, ASM (and also TimesTen) 2.

My understanding of the documentation is that we can just buy servers, installation and configuration of Oracle with the RAC is, install Oracle Clusterware and ASM for storage shared and which is quite...

In other words, there is no need to buy Sun Cluster 3 to create a cluster.
It is also unnecessary to buy Veritas Volume Manager to the Manager of the drive bays, ASM will do.

Can someone confirm?

I ask the question because I heard that some people had CARS with Sun Cluster and I do not see him point with an additional cluster with RAC system. And the same goes for ASM (why should I need another volume Manager?). In the end, it's a lot of money for nothing...

Thanks in advance.

From 10 g, Oracle no longer supports any clustering software, but their own Clusterware for RAC.

"Before the database Oracle 10 g clusterware third was necessary on most operating systems to use CARS. Starting with the Oracle 10 g database, that oracle Clusterware is necessary whenever the CAR is going to be used. Oracle still supports the use of the third-party clusterware in CCR environments"

http://hptv04.files.WordPress.com/2008/07/Oracle-Clusterware-10G.PDF

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