Re: Ho hum
"It's not a real cluster, certainly not a fail proof HA solution, if you have SPOF at the storage level. You can use Active Data Guard to get around it, but now you are talking DR and fail over instead of HA where any component can crash without impact, or with only nominal performance degradation."
Someone doesn't know much about RAC. See http://www.oracle.com/us/products/database/300460-132393.pdf