Excuse me for asking stupid questions, but I'm new to this and find things a bit confusing to find an answer to - especially with different Unraid versions - and have unfortunately 7 other urgent rabbitholes to dive into for work and personally - maybe you guys can help me out? 

 

So, - I have a LincStation (which means: SSD only, and max: 4 NVME + 2 2,5SSD)

 

I read here that Arrays are not good for NVME's because of the trim that will sooner or later fail or mess up things.

So I installed ZFS for 3 NVME drives. So here my current SETUP: 

 

- 3x NVME for my main "data" called "storage" pool in ZFS (plex data, paperless, ..)

- 2x 2,5 called "working", where it stores my appdata and VM's (I'm not really sure why it's in this "BTRFS" format, but it defaulted to that when installing)

 

 

This seemed be a adequate setup for the LincStation (?) 

 

So this is all working quite nicely and I'm a happy camper with this setup. I was able to kill almost 80% of my subscriptions (!).

 

Now, I have 1 additional extra NVME that I'd like to add to the ZFS pool "storage" - see below in blue.

 

 

The first time I added it it asked something about formatting it - and I agreed. The data on the additional drive could be wiped.

 

I thoughtI could easily expand this pool? But now I get:

 

 

Are there easy ways to fix this?

 

Or do i have to unload everything and start completely from scratch just to add this new drive to the ZFS pool? 

 

Thanks!

 

 

Edited January 15, 20251 yr by vurtonic
Spelling

What profile are you using for Storage, I assume raidz?

12 minutes ago, JorgeB said:

What profile are you using for Storage, I assume raidz?

 

thanks.. yes, I think so: 

 

 

ZFS raidz pools cannot be expanded currently, they will once Unraid updates to Openzfs 2.3, which was just release on Monday, it should be in Unraid 7.1.

On 1/15/2025 at 3:41 PM, JorgeB said:

ZFS raidz pools cannot be expanded currently, they will once Unraid updates to Openzfs 2.3, which was just release on Monday, it should be in Unraid 7.1.

Ohh, thanks for the info! I'll just wait then...  should be a gamechanger!

Until unraid supports OpenZFS 2.3 like JorgeB said, you'd need to add 3 more 4TB drives as a second vdev in order to expand it currently.

 

It would look something like:

NAME           STATE     READ WRITE CKSUM
	cache          ONLINE       0     0     0
	  raidz1-0     ONLINE       0     0     0
	    /dev/sda1  ONLINE       0     0     0
	    /dev/sdb1  ONLINE       0     0     0
	    /dev/sdc1  ONLINE       0     0     0
	  raidz1-1     ONLINE       0     0     0
	    /dev/sdj1  ONLINE       0     0     0
	    /dev/sdk1  ONLINE       0     0     0
	    /dev/sdl1  ONLINE       0     0     0

 

so as of 7.2.2, is this now implemented so you can simple add another drive of the same size to expand your pool?

5 hours ago, parish99 said:

so as of 7.2.2, is this now implemented so you can simple add another drive of the same size to expand your pool?

You can for single vdev raidz pools

https://docs.unraid.net/unraid-os/release-notes/7.2.0/#zfs-raidz-expansion