Removing LVM

# df -hP | grep -i data01

/dev/mapper/datavg-testlv  976M  2.6M  907M   1% /data01

# lvs

  LV     VG     Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert

  root   centos -wi-ao---- 17.47g

  swap   centos -wi-ao----  2.00g

  testlv datavg -wi-ao----  1.00g

1. Delete the entry of the mount point from the /etc/fstab :

# cat /etc/fstab

...

/dev/mapper/datavg-testlv            /data01              ext4    defaults        0 0

...

2. Unmount the mount point :

# umount /data01

3. Disable lvm :

# lvchange -an /dev/datavg/testlv

4. Delete lvm volume :

# lvremove /dev/datavg/testlv

5. Disable volume group :

# vgchange -an datavg

6. Delete volume group :

# vgremove datavg

7. Delete physical Volumes being used for the volume group “datavg” :

# pvremove /dev/sdb  /dev/sdc