I just wanted to share few metalink notes on Diagnosing RAC Issues across various platforms. Oracle Support has recently few interesting metalink notes on how to troubleshoot the various layers in a RAC Install i.e Storage, Network, OS, Database, Listener, CRS and ASM Components.
The document also lists various whitepapers/metalink articles on troubleshooting IPMP, RAC Node evictions, Performance Tuning CRS on various platforms
Note 810394.1 RAC Assurance Support Team: RAC Starter Kit and Best Practices (Generic)
Note 811306.1 RAC Assurance Support Team: RAC Starter Kit and Best Practices (Linux)
Note 811280.1 RAC Assurance Support Team: RAC Starter Kit and Best Practices (Solaris)
Note 811271.1 RAC Assurance Support Team: RAC Starter Kit and Best Practices (Windows)
Note 811293.1 RAC Assurance Support Team: RAC Starter Kit and Best Practices (AIX)
Note 811303.1 RAC Assurance Support Team: RAC Starter Kit and Best Practices (HP-UX)