Yes, Oracle Solaris Cluster does make things a lot easier. It looks after your device space and gives you consistent DID devices for CRS/RAC. It gives you the choice to use sQFS, raw metasets, or ASM. It has clprivnet which is a lot easier and performs better than an IPMP solution. The node failure detection time is <= 10 seconds which is quicker than CRS on it's own and it uses SCSI fencing instead of a STONITH approach. Finally, you have all the off the shelf agents that Solaris Cluster offers.Do we absolutely need that in our new setup or could we forgo that additional layer? Would Sun Cluster give us anything that the OS + RAC doesn't give us?