ZFS Mirror Setup

[MH_MUC]

Hi everyone. I want to switch to Proxmox and just tried the installation with the ZFS support of Proxmox as zfs-raid1in a virtual box before trying it on the real system.
I have two 2TB drives.

Here is my question:
I have a local storage with 1,8 TB
and a local-zfs with 1,8 TB now.

This can't be true. It must be some kind of a shared stroage or the mirror is not working. What is my mistake?

root@maxtest:~# zpool status
pool: rpool
state: ONLINE
scan: none requested
config:

NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
ata-VBOX_HARDDISK_VB99a9d930-ad7e0611-part3 ONLINE 0 0 0
ata-VBOX_HARDDISK_VB1f33d794-221d15e9-part3 ONLINE 0 0 0

errors: No known data errors

root@maxtest:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 1.8T 0 disk
├─sda1 8:1 0 1007K 0 part
├─sda2 8:2 0 512M 0 part
└─sda3 8:3 0 1.8T 0 part
sdb 8:16 0 1.8T 0 disk
├─sdb1 8:17 0 1007K 0 part
├─sdb2 8:18 0 512M 0 part
└─sdb3 8:19 0 1.8T 0 part
sr0 11:0 1 1024M 0 ro

 

[aaron]

The local storage is a default directory storage located in /var/lib/vz that can, for example, be used to store ISOs.

Everything is as it should be.
The local-zfs storage is using the ZFS pool directly and can be used for guest disks.

 

[MH_MUC]

I understand it so far, but how can I have two storages which have 1,8 TB each on a raid with only 2TB total space?

 

[aaron]

That comes down to how ZFS counts the free space. Since your root volume is on the ZFS pool it does see the same amount of free space, which is the free space of the whole pool.

IF you start filling up either storage, the free space shown will go down for both.