LVM

wipefs -a /dev/sdc /dev/sdd

pvcreate /dev/sdc /dev/sdd #(1)!

pvs #(2)!

vgcreate <name_of_volume_group> /dev/sdc /dev/sdd #(3)!

vgs #(4)!

lvcreate -T -l 100%FREE --poolmetadatasize 16G <name_of_volume_group>/<name_of_thin_pool> #(5)!

lvs -a #(6)!

1. create pvs
2. check if the physical volumes are successfully created
3. create vg
4. check if the volume group got created successfully
5. create a thin pool LV (this might show a warning regarding the maximum size, which is fine)
6. verify whether everything worked correctly

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Removing LVM (e.g. before OS reinstall)

If the installer refuses to proceed because it detects existing LVM on the disks, boot from a live ISO and run:

# 1. Deactivate all logical volumes
sudo vgchange -an

# 2. Remove all LV, VG, PV
sudo lvremove -f $(sudo lvs --noheadings -o lv_path)
sudo vgremove -f $(sudo vgs --noheadings -o vg_name)
sudo pvremove -f $(sudo pvs --noheadings -o pv_name)

# 3. Wipe leftover metadata from disks (substitute your disks)
sudo wipefs -a /dev/sdX

!!! warning Before wipefs, run lsblk to make sure you don't wipe the live USB. After this, restart the installer.