Current vdev config?

[nasnice]

It has been some time since I made my present system Freenas 11.1-U7 with 10 12 TB disks... I want to extend the storage of this system now So I am thinking :
Either to add disks to the present Vdev RAidz2 or to create a new Vdev from the new disks 10 x 20 TB .... that needs to be Raidz2 as well correct?

Have done some reading but did not find a clear answer.. Afraid of losing too much disk capacity...
Any Ideas? Or usefull reading suggestions?
Thanks in advance

 

[danb35]

Either to add disks to the present Vdev RAidz2

This isn't possible. You can replace the disks, one by one, with larger disks, but you can't add disks to a vdev (other than to turn an n-way mirror into an n+1-way mirror).

create a new Vdev from the new disks 10 x 20 TB .... that needs to be Raidz2 as well correct?

It doesn't need to, but it's strongly recommended.