Loosely based on https://dannyda.com/2022/10/15/how-to-convert-qcow2-virtual-disk-to-zfs-zvol-for-vurtual-machine-vm-in-proxmox-ve-pve/

• Unordered List ItemCopy the vmdk to the proxmox machine:

scp unifiController-disk1.vmdk [email protected]:/pool1

• SSH into the proxmox machine and convert the vmdk to a raw disk image

convert -f vmdk /pool1/unifiController-disk1.vmdk -p -O raw /pool1/unifiController.raw ; sync

• Create the VM in Proxmox, making a zvol in the same or greater capacity. Note the VID.
• List zvols on the proxmox host

root@pedge:/pool1# ls -hapl /dev/zvol/pool1/
total 0
drwxr-xr-x 2 root root 660 Sep 16 11:33 ./
drwxr-xr-x 3 root root  60 Sep 11 21:39 ../
lrwxrwxrwx 1 root root   9 Sep 13 13:55 vm-100-disk-0 -> ../../zd0
lrwxrwxrwx 1 root root  10 Sep 13 13:55 vm-100-disk-1 -> ../../zd16
...
...
lrwxrwxrwx 1 root root  11 Sep 16 11:33 vm-107-disk-0 -> ../../zd144

• dd the raw disk image into the zvol

dd if=/pool1/unifiController of=/dev/zd144 bs=1M status=progress oflag=dsync ; sync