Partitioning on install

install debian and pve on top of it. the debian installer lets you preserve windows. but debian doesnt support zfs root fs
Thanks. Though i love its featureset, I became hesitant of zfs as it consumes a lot of memory for the small scale VM servers i build. I hope the people who distribute the Proxmox ISO take a moment to enable partitioning sooner or later, it is needlessly aggressive to claim entire disks.

This particular machine would run just two or three VM maximum.

I consider btrfs but it does not seem to be as stable as zfs is considered to be.