ZFS, BTRFS, LVM, Directory. There are many options for storing VM images on a disk in Proxmox and other KVM based hypervisors. In this video, I take a look at the features and performance of all of these different storage methods. For my test system I used a Xeon E5 2643 V4 system running Proxmox VE with 128GB RAM, and a PM1725 as the test ssd.