root@vikashruhil-Inspiron-1440:/home/vikash-ruhil# pvremove /dev/sda6
  Couldn't find device with uuid FxJNXj-5fOG-BWV1-MJI3-rWcq-PWLr-O27d5M.
  Can't pvremove physical volume "/dev/sda6" of volume group "vol_grp1" without -ff
root@vikashruhil-Inspiron-1440:/home/vikash-ruhil# vgremove vol_grp1
  Couldn't find device with uuid FxJNXj-5fOG-BWV1-MJI3-rWcq-PWLr-O27d5M.
  WARNING: 1 physical volumes are currently missing from the system.
Do you really want to remove volume group "vol_grp1" containing 1 logical volumes? [y/n]: y
Do you really want to remove active logical volume logical_vol1? [y/n]: y
  Logical volume "logical_vol1" successfully removed
  Volume group "vol_grp1" not found, is inconsistent or has PVs missing.
  Consider vgreduce --removemissing if metadata is inconsistent