CRS-0184: Cannot communicate with CRS daemon.

Solution:
 a) check permission in raw devices
   # ls -lrt /dev/raw/raw*
 Permission should be for oracle user NOT for root. execute the following as 
 a root user.
chown oracle:oinstall /dev/raw/raw1
chown oracle:oinstall /dev/raw/raw2
chown oracle:oinstall /dev/raw/raw3
chown oracle:oinstall /dev/raw/raw4
chown oracle:oinstall /dev/raw/raw5
chmod 600 /dev/raw/raw1
chmod 600 /dev/raw/raw2
chmod 600 /dev/raw/raw3
chmod 600 /dev/raw/raw4
chmod 600 /dev/raw/raw5