CLSRSC-400: A system reboot is required to continue installing.

　　I try to install oracle database 12c RAC on the RedHat 7.3,when I execute the script '/u01/app/12.2.0/Root.sh' on node 1, I got the error: CLSRSC-400: A system reboot is required to continue installing. I'm too helpless to resolve that error. If I reboot the system, the install will be interrupted.

　　THE LOG IS:

　　

[root@raca2 oraInventory]# /u01/grid/app/12.2.0/root.sh
Performing root user operation.

The following environment variables are set as:
    ORACLE_OWNER= grid
    ORACLE_HOME=  /u01/grid/app/12.2.0

Enter the full pathname of the local bin directory: [/usr/local/bin]: 
   Copying dbhome to /usr/local/bin ...
   Copying oraenv to /usr/local/bin ...
   Copying coraenv to /usr/local/bin ...


Creating /etc/oratab file...
Entries will be added to the /etc/oratab file as needed by
Database Configuration Assistant when a database is created
Finished running generic part of root script.
Now product-specific root actions will be performed.
Relinking oracle with rac_on option
Using configuration parameter file: /u01/grid/app/12.2.0/crs/install/crsconfig_params
The log of current session can be found at:
  /u01/grid/app/grid/crsdata/raca2/crsconfig/rootcrs_raca2_2017-04-01_02-21-16AM.log
2017/04/01 02:21:19 CLSRSC-594: Executing installation step 1 of 19: 'SetupTFA'.
2017/04/01 02:21:19 CLSRSC-4001: Installing Oracle Trace File Analyzer (TFA) Collector.
2017/04/01 02:21:42 CLSRSC-4002: Successfully installed Oracle Trace File Analyzer (TFA) Collector.
2017/04/01 02:21:42 CLSRSC-594: Executing installation step 2 of 19: 'ValidateEnv'.
2017/04/01 02:21:43 CLSRSC-363: User ignored prerequisites during installation
2017/04/01 02:21:43 CLSRSC-594: Executing installation step 3 of 19: 'CheckFirstNode'.
2017/04/01 02:21:44 CLSRSC-594: Executing installation step 4 of 19: 'GenSiteGUIDs'.
2017/04/01 02:21:44 CLSRSC-594: Executing installation step 5 of 19: 'SaveParamFile'.
2017/04/01 02:21:47 CLSRSC-594: Executing installation step 6 of 19: 'SetupOSD'.
2017/04/01 02:21:47 CLSRSC-594: Executing installation step 7 of 19: 'CheckCRSConfig'.
2017/04/01 02:21:48 CLSRSC-594: Executing installation step 8 of 19: 'SetupLocalGPNP'.
2017/04/01 02:21:49 CLSRSC-594: Executing installation step 9 of 19: 'ConfigOLR'.
2017/04/01 02:21:51 CLSRSC-594: Executing installation step 10 of 19: 'ConfigCHMOS'.
2017/04/01 02:21:51 CLSRSC-594: Executing installation step 11 of 19: 'CreateOHASD'.
2017/04/01 02:21:52 CLSRSC-594: Executing installation step 12 of 19: 'ConfigOHASD'.
2017/04/01 02:22:08 CLSRSC-330: Adding Clusterware entries to file 'oracle-ohasd.service'
2017/04/01 02:22:34 CLSRSC-594: Executing installation step 13 of 19: 'InstallAFD'.
2017/04/01 02:22:35 CLSRSC-594: Executing installation step 14 of 19: 'InstallACFS'.
CRS-2791: Starting shutdown of Oracle High Availability Services-managed resources on 'raca2'
CRS-2793: Shutdown of Oracle High Availability Services-managed resources on 'raca2' has completed
CRS-4133: Oracle High Availability Services has been stopped.
CRS-4123: Oracle High Availability Services has been started.
2017/04/01 02:23:08 CLSRSC-400: A system reboot is required to continue installing.
The command '/u01/grid/app/12.2.0/perl/bin/perl -I/u01/grid/app/12.2.0/perl/lib -I/u01/grid/app/12.2.0/crs/install /u01/grid/app/12.2.0/crs/install/rootcrs.pl ' execution failed

　　So I go to MOS to find out the reason, and I find two document :ACFS Drivers Install reports CLSRSC-400: A system reboot is required to continue installing (Doc ID 2025056.1)  and How to Verify that the ACFS Driver is installed and loaded (Doc ID 1319263.1)，those document indicate that ：When installing the Grid Infrastructure software, it always tries to install ACFS drivers.

　　I check my environment use follow scripts：

　　

[grid@raca1 ~]$ acfsdriverstate -orahome $ORACLE_HOME supported

　　And I got the follow response：
　　

ACFS-9459: ADVM/ACFS is not supported on this OS version: '3.10.0-514.el7.x86_64'
ACFS-9201: Not Supported

　　My system not support for ADVM/ACFS，means I can not install the ACFS drivers.

　　The ‘Doc ID 2025056.1’ indicate：These error messages can be ignored if  ACFS will not be used or is not supported on the node. So I reboot my system and remove the file installed. Then I install again ，and no error appeared。

　　If node 2 appears the same error ，just reboot system and run the root.sh again.