To make administration and problem diagnosis easier in Oracle Clusterware, there is a single consolidated directory structure for the main clusterware log files.
This is found under $GRID_HOME/log/[hostname]/
The CRSD logfile – crsd.log is stored in the /crsd/ directory and is archived every 10mb.
The CSS logfiles – cssd.log is stored in the /cssd/ directory. This is archived every 20mb.
EVM logs are under /evmd/
SRVM (srvctl) is found along with the OCR logfiles under /client/ and also under $ORACLE_HOME/log/[hostname]/client/