VxVM not mounting on boot up

I notice that the Volume I have created under Veritas doesn't mount on boot even though it was on /etc/fstab. I'm using CentOS 6. Below is my entry on /etc/fstab

/dev/vx/dsk/datadg/datavol /file ext4 defaults,_netdev 0 0

I found out that it requires netfs so I add it on boot and it was now mounting after the reboot

[root@centosprod1 ~]# chkconfig --list | grep 3:on | grep netfs
netfs           0:off   1:off   2:on    3:on    4:on    5:on    6:off