Today successfully provisioned a 3 node cluster with CRS, ASM + Instances, RDBMS software tree. The provisioning took aprox. 2:30 hours.
Using a procedure based on out of the box procedure “Oracle Clusterware / RAC Provisioning For UNIX” 4.8.
The procedure creates a default diskgroup DATA, although the DBCA command to configure ASM was modified not to create any diskgroup. We therefore need to drop this diskgroup after provisioning.