Error creating RAIDZ2

[WhiteTiger]

With a fresh install of Proxmox, creating RAIDZ2 on 4HDD I got this error.

# /sbin/zpool create -o ashift=12 RZ2-4x1TB raidz2 /dev/disk/by-id/ata-WDC_WD10EZEX-08WN4A0_WD-WCC6Y6NJ4S74 /dev/disk/by-id/ata-WDC_WD10EZEX-08WN4A0_WD-WCC6Y2UP55YV /dev/disk/by-id/ata-WDC_WD10EZEX-08WN4A0_WD-WCC6Y0UF11ZN /dev/disk/by-id/ata-WDC_WD10EZEX-00WN4A0_WD-WCC6Y3ZDUHJ8
# /sbin/zfs set compression=on RZ2-4x1TB
# systemctl enable zfs-import@RZ2\x2d4x1TB.service
Created symlink /etc/systemd/system/zfs-import.target.wants/zfs-import@RZ2\x2d4x1TB.service -> /lib/systemd/system/zfs-import@.service.
TASK ERROR: 400 Result verification failed config: type check ('object') failed

Also I see that the ZFS capacity is 3.6TB.
Being 4 HDDs of 1TB each, it means that RAIDZ2 was not actually created.

 

[Alwin Antreich]

TASK ERROR: 400 Result verification failed config: type check ('object') failed

This doesn't mean that the pool wasn't created.

Also I see that the ZFS capacity is 3.6TB.
Being 4 HDDs of 1TB each, it means that RAIDZ2 was not actually created.

The z2 means, on each write ZFS will create two parities. And only when data is written, that's why the pool will show 3.6TB when empty.

Anyway, if you intent to host VM/CT on it, then better use RAID10 instead. It will give you better IOps.
https://pve.proxmox.com/pve-docs/pve-admin-guide.html#_installation_as_root_file_system

 

[Dunuin]

Keep in mind to change the volblocksize before creating your first VM or you will waste alot of space due to padding overhead.
If your pool uses ashift=12 your volblocksize need to be atleast 64K. With the default value of 8K you will only be able to use 1/3 of your total capacity and not 1/2 of it.
And also keep in mind that a ZFS pool shouldn't be filled more than 80-90% or it will get slow. So without changing the volblocksize only about 1TB of capacity is really usable.