How to Verify that the ACFS Driver is installed and loaded - Oracle Server - Enterprise Edition - Version: 11.2.0.2 and later [Release: 11.2 and later ]

How to Verify that the ACFS Driver is installed and loaded - Oracle Server - Enterprise Edition - Version: 11.2.0.2 and later [Release: 11.2 and later ]

This node describes how you can verify that
1.) your platform supports ACFS

2.) the ACFS driver is installed

3.) the ACFS driver loaded

Solution
There is a tool called acfsdriverstate in the folder $GRID_HOME/bin , that can be used.
usage: acfsdriverstate [-orahome <ORACLE_HOME>] <installed | loaded | version | supported> [-s]

First we would like to know if your OS platform supports ACFS. We use the option supported and find:
acfsdriverstate -orahome /home/oracle/app/oracle/product/11.2.0/grid supported

ACFS-9200: Supported
that means our platform is supported. In case it is not supported we get
acfsdriverstate -orahome $ORACLE_HOME supported

ACFS-9459: ADVM/ACFS is not supported on this OS version: '2.6.32-100.26.2.el5'

ACFS-9201: Not Supported
To check if the driver is installed, we can use
acfsdriverstate -orahome /home/oracle/app/oracle/product/11.2.0/grid installed

ACFS-9203: true
The result true shows here that it is installed.

To see if the Driver is loaded into the kernel we can use the following command:

acfsdriverstate -orahome /home/oracle/app/oracle/product/11.2.0/grid loaded

ACFS-9203: true
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http://docs.oracle.com/cd/E11882_01/server.112/e10500/asmfs_util001.htm#OSTMG94790