The second and final post about an issue with a RAC-configuration with two SAN’s. Problem was a i/o-freeze of minutes when crashing one of the two SAN’s. The first post I ended with a ‘cliffhanger’ because we had a solution, but not tested it yet. Now we tested it.
Start with a mockup of the first post.
3 HP DL380 G6 systems with a basic RHEL 5u5 x86_64 installation (2 x RAC clusternodes, 1 x NFS-voting-node)
2 SAN’s HP EVA 6400 systems with 2 controllers each (resulting in 8 paths per device)
Test: power off 1 SAN. Default result / problem: i/o freeze of minutes, Oracle didn’t like it, started to evict, shutdown, startup = expected behaviour after such a long i/o freeze. But this is not the intention when installing a RAC with two SAN’s….