I have been practicing Oracle RAC 11gR2 since few days, after getting quite good hands on installation and configuration in test env, i am looking forward for the recommendations for the Disk Layout/architecture for production Env. I have some question related to the same.
OS : Red Hat 6
IBM Storwize V3700.
1. Should I have different Disk Group for Data, OCR/Voting and Flash Recovery area ?
2. If yes, can I have different RAID level for all or some ? As observed storing archivelogs on RAID 5 is performance killer.
3. what can best server iSCSI or Fiber ?
4. What can be best for interconnect: cross-over cable or is there any option for it.
Any more suggestion are also welcome.