[04:52] <pppingme> tmhoang I don't know any reason you can't do it hot unless there's something I'm not aware of with pv's on z??
[06:23] <tmhoang> pppingme: booting ISO in z/VM, how would you do that ?
[07:03] <tmhoang> I think if Ubuntu provides a root image (rather big, agree) where initramfs can chroot later on, that would solve my problem
[07:03] <tmhoang> http://ports.ubuntu.com/dists/bionic-updates/main/installer-s390x/current/images/generic/
[07:05] <tmhoang> can do that easily with Alpine (because by default installer media is live, aka fullly functional shell) but not sure about using musl-based tools to touch glibc-based LVM. should work I guess.
[07:07] <tmhoang> finally I had to use Fedora root image because they provide it : https://dl.fedoraproject.org/pub/fedora-secondary/releases/30/Server/s390x/os/images/install.img