mount: unknown filesystem type 'LVM2_member'

mount: unknown filesystem type 'LVM2_member'

I was working with Xen Virtual Machine Images . I was required to mount a Centos VM Image to  a local directory. So I followed the steps mentioned here.

http://blogforopensource.blogspot.in/2014/05/mount-x86-boot-sector-partition-1-linux.html

After completing those steps, when  I mounted to a local directory, I got the following error.

mount: unknown filesystem type 'LVM2_member'

Again, googling gave me the following link.

 http://webcache.googleusercontent.com/search?q=cache:ucDWE1CNcJ4J:pissedoffadmins.com/os/mount-unknown-filesystem-type-lvm2_member.html+&cd=1&hl=en&ct=clnk&gl=in&client=firefox-a

I ran the following commands.

lvmdiskscan
lvdisplay

and found that /dev/VolGroup/lv_root is my mount point.

When I mounted, again the same error message was shown.

mount: unknown filesystem type 'LVM2_member'

Now I executed,

lvscan
modprobe dm-mod
vgchange -ay


Now the volume got activated.
Now I was able to mount the file system.

mount /dev/VolGroup/lv_root t


Success at last (!)