Interesting how Oracle allows flash cards (Sun Flash Accelerator F20 PCIe cards) to be used with 11gR2 RAC, but only on Oracle Solaris and OEL..

http://www.oracle.com/technetwork/articles/systems-hardware-architecture/oracle-db-smart-flash-cache-175588.pdf

http://www.oracle.com/technetwork/articles/servers-storage-admin/smart-flash-cache-oracle-perf-361527.html