Hello,

over the last days, I've built my new Unraid server, full SSD and ZFS pools only, to replace my aging one (still using ReiserFS, some disk running for more than 11 years...). I did the migration of my data, dockers and VMs smoothly. And I was starting using as my daily NAS, the old one was offline!

So, everything was fine until my motherboard suddenly died...

Now is the question: considering I'll have a new motherboard, probably not the same model than the dead one, will I be able to rebuild the pools and keep everything in place.

I have 3 pools:

• 1 for VMS and 1 for Dockers, two SSDs each, in mirror mode

• The main pools, 7 SSDs, configure in Raidz2 mode

So, will Unraid be able to correctly combine the disks so the pools are good once I've installed the new mobo and plugged all the SSDs? Not that it's critical, as the old one is still up and running, but I'd like not to repeat again the process (especially copying again my 20 TB data!!)

Thanks,

Cyril.

Edited October 17, 2025Oct 17 by Napryc

Unraid doesn't care about the hardware for storage devices; as long as no RAID controllers are being used, it should be plug and play.

35 minutes ago, JorgeB said:

Unraid doesn't care about the hardware for storage devices; as long as no RAID controllers are being used, it should be plug and play.

No RAID controllers used , so that's great news! I knew it was the case for the classic unraid arrays, so I was hoping it would be the same for zfs pools!

Thanks for confirming, I'll just have to wait for my new mobo now!

Thanks!

Ok,

so I have received my new mobo, and reinstalled everything. Now, when I start Unraid, I can see the pools, but they are all set with one slot only, and no drive attached. All my drives are listed under the Unassigned Devices section.

I had the Unassigned plugin installed, so I thought it could create some issues, removed it, but no difference (with the plugin, each drive had the proper mounting point being shown)

Any suggestion? Should I just allocate the drives manually? I have the diagnostics zip from the crash, so I can probably get the organisation of the devices from there.

Thanks!

Edited October 24, 2025Oct 24 by Napryc

If the devices have the same IDs, they should have remained assigned, but if the issue is only that they became unassigned, you should be able to reimport the pools:

on main click on the first device for that pool and then "remove pool"

back on main, create a new pool with the same name and number of slots

assign the pool device(s), leave the filesystem set to auto

start the array to import the pool

Do this for all pools.

If you don't know with devices belong to each pool you should be able to find out with btrfs fi show and zpool import

Thanks,

zpool import has been very useful, everything is back to normal now!