LVM (Logical Volume Manager) is a layer between a filesystem and the physical disk partitions.

It is useful for resizing partitions and moving data in live situations.

Slacko 6.3.2 already has LVM present but needs logical volumes (LVs) to be 'activated'. Older Puppies will require lvm to be install first, see link below (test by using lvdisplay command). Fatdog64 has LVM working 'out of the box'.

Initialise mount LVM on Slacko 6.3.2 (2016) thread

LVM information and LVM2.2.02.79.pet post - to install LVM

Fatdog64 alongside (L)ubuntu - boot from LVM (uncalculated rhythms)

How to mount an LVM2 filesystem? (2014) thread

How to do RAID0 with USB thumb drives using lvm

Accessing LUKS encrypted partition with LVM post

Logical Volume Manager (Wikipedia)