Comment 1 for bug 1768384

This seems to be a problem in curtin. For easy reproduction, I've uploaded a raw disk image that was formatted by freenas to https://people.canonical.com/~mwh/target2.tgz (it's a 10G image, but sparse). Then run "kvm -m 1024 -boot d -cdrom ~/isos/bionic-live-server-amd64.iso -hda ~/images/target2.img" or whatever paths required on your system and try to install do the disk; it will fail with errors in the logs about zpool not being installed, but really curtin should be wiping the disk by writing zeros, not by trying to carefully dismantle the zfs setup.