Issue: 

^CFailed to write the checkpoint:'ROOTCRS_BOOTCFG' with status:FAIL.Error code is 33280

INT at /oracle/grid/11g/crs/install/crsconfig_lib.pm line 1446.

/oracle/grid/11g/perl/bin/perl -I/oracle/grid/11g/perl/lib -I/oracle/grid/11g/crs/install /oracle/grid/11g/crs/install/rootcrs.pl execution failed

Oracle root script execution aborted!

Solution: 

Failed to start Oracle OHASD service during root.sh

During the installation of 11gr2 RAC on RHEL 7, when running root.sh script getting error as Failed to start Oracle OHASD service when gone through the DOC came to know that its knows issue for 11gr2 with RHEL 7, This happens since RHEL 7 onwards, it uses systemd rather than initd for starting or restarting processes and runs them as a service. And in current software install of 11.2.0.4 will not succeed because the ohasd process does not start properly. Hence you can use following work around

Perform below steps on both node

Step 1: Login as  ROOT user

cd /etc/systemd/system/

touch ohasd.service

Step 2: Edit the file ohasd.service and add the following text

[Unit]

Description=Oracle High Availability Services

After=syslog.target

[Service]

ExecStart=/etc/init.d/init.ohasd run >/dev/null 2>&1 Type=simple

Restart=always

[Install]

WantedBy=multi-user.target

Step3 : Run the following commands (as root):

systemctl daemon-reload

systemctl enable ohasd.service

systemctl start ohasd.service

4. Now run root.sh from the Grid $OH and it should succeed

Refer Doc ID 1959008.1