My goal was to remove four drives from a pool. I have a total of three pools.

disk_storage: 4x 18TB drives

sas: 4x 1.6TB drives

zfs_pool: 12x 3.84 drives (this is the one I wanted to remove four drives from to make it 8 drives.

I copied all the data from the zfs_pool to the disk_storage pool to back it up. Then I removed the four drives and made a new config but I was expecting to see the option to keep all the pool assignments, and then I would just remove the four drives and transfer the data back into the pool. I think this is where I went wrong. Afterwards, no pools are displayed in the GUI but the pools are intact in ZFS master and in the CLI.

How do I get the pools to show as they did before on the main tab, with each pool with each associated drive under it?

You can just reimport the pools:

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

For the zfs pool, if you still want to create a new pool, assign the 8 devices, then click "erase", then choose the filesystem/profile you want for the new pool

2 hours ago, JorgeB said:

You can just reimport the pools:

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

For the zfs pool, if you still want to create a new pool, assign the 8 devices, then click "erase", then choose the filesystem/profile you want for the new pool

I tried this and it says they’re unmountable. I’m not worried about the zfs_pool since I have to rebuild it but the other pool (sas and disk_storage) I can’t reformat them without loosing data,

Edited December 30, 2025Dec 30 by Pstark

Ok, I figured it out. I had to export all pools then restart the server. Since the sas and disk_storage pools already had the drives assigned to them, the pools populated correctly and I just had to format the zfs_pool drives and I’m back up and running like I wanted.

4 hours ago, Pstark said:

Ok, I figured it out. I had to export all pools then restart the server.

Correct, GUI cannot import already imported pools.