ODA Oracle Database Appliance orachk Healthcheck (Doc ID 2126926.1)
Multiplexing Redolog and Control File on ODA (Doc ID 2086289.1)
ORAchk – Health Checks for the Oracle Stack (Doc ID 1268927.2)
How to Perform a Health Check on the Database (Doc ID 122669.1)
Health Monitor (Doc ID 466920.1)
Oracle Configuration Manager Quick Start Guide (Doc ID 728988.5)
Pre-12+ OCM Collectors to Be Decommissioned Summer of 2015 (Doc ID 1986521.1)
cluvfy comp healthcheck
One example found: ORAchk will report if less than 3 SCANs configured while cluvfy comp healthcheck (11.2) does not.
Intesteresting side track: < 3 not escaped is 
Complete cluvfy comp healthcheck results plus how to create database user CVUSYS (WARNING: ~1600 lines).
