ASMCA tabs Volume and ASM Cluster File System are grayed out

Scenario:
DBA wanted to create the ACFS but got the Volume and Cluster File System grayed out.

Solution:

Load ACFS file system modules

Some file system modules must be loaded before using ACFS. On linux these drivers include:

• oracleasm, the ASM module;
• oracleadvm, the ASM dynamic volume manager module;
• oracleoks, the kernel services module;
• oracleacfs, the ASM file system module

The modules are installed during Clusterware installation, but except they are not started at system boot by default.

Run acfsload and try again with ASMCA.
[root@SN3-IUB-RV-OD03 dev]# cd /u02/app/11.2.0/grid/bin/
[root@SN3-IUB-RV-OD03 bin]#  ./acfsload start -s

You can check currently loaded modules as root user. 

[root@SN3-IUB-RV-OD03 bin]# lsmod |grep oracle

oracleacfs           1788888  0

oracleadvm            270720  0

oracleoks             420496  2 oracleacfs,oracleadvm

oracleasm              84136  1

You can configure init script to load ACFS modules at system reboot

[root@SN3-IUB-RV-OD03 dev]# vi /etc/init.d/acfsload

#! /bin/ksh
#chkconfig: 2345 30 21
# description: Load Oracle ACFS drivers at system boot
/u02/app/11.2.0/grid/bin/acfsload start -s

[root@SN3-IUB-RV-OD03 bin]# chmod u+x /etc/init.d/acfsload

[root@SN3-IUB-RV-OD03 bin]# chkconfig --add acfsload

[root@SN3-IUB-RV-OD03 bin]# chkconfig --list acfsload

acfsload        0:off   1:off   2:on    3:on    4:on    5:on    6:off

[root@SN3-IUB-RV-OD03 bin]#

Note: the above test done on the non-RAC system, for the RAC you have to do the steps for all involved nodes.