Removing a disk from LVM

If the non-root LVM volume, Volume Group, and Physical Volume used for the LV are no longer required on the system, then it could be removed/deleted using following steps. If the LVM volume is containing any required data, then please make sure to take a backup of that data before proceeding with following steps:

In this example, we will be deleting “testlv” from the volume group “datavg”. The LV is mounted on the mount point /data01.

# 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

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

# cat /etc/fstab
...
/dev/mapper/datavg-testlv            /data01              ext4    defaults        0 0
...

Unmount the mount point :

# umount /data01

Disable lvm :

# lvchange -an /dev/datavg/testlv

Delete lvm volume :

# lvremove /dev/datavg/testlv

Disable volume group :

# vgchange -an datavg

Delete volume group :

# vgremove datavg

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

# pvremove /dev/sdb  /dev/sdc

(taken mostly from https://www.thegeekdiary.com/centos-rhel-how-to-delete-lvm-volume/)