Problem to create RaidZ

can you post the complete task log? (double click on the zfs create task log in the bottom)
 
# /sbin/zpool create -o ashift=12 DATEN raidz /dev/disk/by-id/ata-WDC_WD20EFRX-68EUZN0_WD-WCC4M4AJA9HA /dev/disk/by-id/ata-WDC_WD20EFRX-68EUZN0_WD-WCC4M2HKN9PD /dev/disk/by-id/ata-WDC_WD20EFRX-68EUZN0_WD-WCC4M0RSC01N /dev/disk/by-id/ata-WDC_WD20EFRX-68EUZN0_WD-WCC4M5DRJ2PU
invalid vdev specification
use '-f' to override the following errors:
/dev/disk/by-id/ata-WDC_WD20EFRX-68EUZN0_WD-WCC4M5DRJ2PU contains a corrupt primary EFI label.
TASK ERROR: command '/sbin/zpool create -o 'ashift=12' DATEN raidz /dev/disk/by-id/ata-WDC_WD20EFRX-68EUZN0_WD-WCC4M4AJA9HA /dev/disk/by-id/ata-WDC_WD20EFRX-68EUZN0_WD-WCC4M2HKN9PD /dev/disk/by-id/ata-WDC_WD20EFRX-68EUZN0_WD-WCC4M0RSC01N /dev/disk/by-id/ata-WDC_WD20EFRX-68EUZN0_WD-WCC4M5DRJ2PU' failed: exit code 1
 
you could try the 'wipe disk' button in the gui (node -> disks)

or use a cli tool of your choice to remove the partitions/wipe the disk (e.g. fdisk/gdisk, wipefs, etc. this is general linux stuff and not really proxmox specific)
 
yes that is only available in pve 7
 

About

The Proxmox community has been around for many years and offers help and support for Proxmox VE, Proxmox Backup Server, and Proxmox Mail Gateway.
We think our community is one of the best thanks to people like you!

Get your subscription!

The Proxmox team works very hard to make sure you are running the best software and getting stable updates and security enhancements, as well as quick enterprise support. Tens of thousands of happy customers have a Proxmox subscription. Get yours easily in our online shop.

Buy now!