oracleasm module not loaded

[root@oraafd ~]# oracleasm createdisk DATA1 /dev/sdb1
oracleasm module not loaded or /dev/oracleasm not mounted.


oracleasm init   <<<< run this command 

[root@oraafd ~]# df -ha |grep -i oracleasm
oracleasmfs                    0     0     0    - /dev/oracleasm
[root@oraafd ~]#


[root@oraafd ~]# oracleasm createdisk DATA1 /dev/sdb1
Writing disk header: done
Instantiating disk: done
[root@oraafd ~]#