Hello everybody, 

 

I have made a plan in my head to do an "all in once" Upgrade / Migration. 

 

Current System is an Unraid 6.12.13 with 4 Disks (2 Disk Parity) Array --> Goal is to move this to an 7.0.0-rc.1 Server and the data from the array to an 8 Disk ZFS Raidz2 Pool.

Why? Because I wanna use Full ZFS for longterm Data Storage and also the new Mover ability to move from pool to pool.

 

Disks are all 12 TB same Model

 

Plan: 

 

Add 4 New Drives into existing Server Create and ZFS RaidZ2 Pool with 4 Disks

Copy all Data from Array to Pool 

Inplace Upgrade from 6.12 to 7.0.0-rc.1 

In Case this works well --> Delete the Array

Add the old 4 Free disks from the Array to the ZFS Pool to get more Storage

 

I think this should be pretty doable with a moderate risk of data loss 

 

I have two main questions:

 

Is there any Big Showstopper that i have overlooked?

 

Can i easily expand the ZFS Pool over the GUI or do i need CLI Magic to make this happen?

 

Thanks in advance for your input and recomendations. 

 

Greetings

That would work, but raidz2 with 4 disks is not very efficient, and while you could expand it, for now, only by adding another raidz2 vdev with 4 devices, so it would only use 50% of the capacity for data, might as well use stripped mirrors instead.

@JorgeB

Thanks for the answer. Final Capacity is basically one of my question that I couldn't find out.

Can I just add the four drives to get a total of 1dev8Drives? 

The calculators in the net roughly spit out 65TB capacity for that config when building it from ground up. But will I be able to achieve the same capacity by adding the 4 drives later?

 

Edit:

After reading a little bitmore I think the feature I'm looking for is zfs expansion. Question is is that already implemented in the current V7 Release?

Edited December 18, 20241 yr by Akanada

12 hours ago, Akanada said:

Question is is that already implemented in the current V7 Release?

OpenZFS 2.3 adds raidz expansion, but it's not out yet, currently in rc status, I would expect that it would be included with Unraid 7.1