Proxmox - (real) disk usage on ZFS-R10?

[TDW0kxvche9]

Hi there,
i'm setting up our first Proxmox-Server with ZFS RAID 10 (6 NVMe's) and have a question regarding to the (real) disk usage.
Actual, the ZFS-Pool consumes 1,13 TB. If i summarize all virtual disks of my VMs, i get abound 1 TB.
The disk usage inside the VM is primary at ~50%, so the real used disk space is about 500GB.
All VMs have the qemu-guest-agent installed (primary Windows-Servers).
I've checked "Discard" and "SSD emulation" on all virtual disks.

I thought, ZFS would only consume the real disk space used inside the VM? Am i wrong?

Thanks in advance,
Bastian

 

[fba]

Hi,

did you enable the Thin provision checkbox in the storage configuration?

 

[TDW0kxvche9]

No, i didn't! :-D Thanks in advance!

 

[LnxBil]

No, i didn't! :-D Thanks in advance!

You need to change all disks that have been created before, the setting is only valid for new disks.