I am trying to migrate from an XFS cache disk to an ZFS cache pool. Somehow, I am stuck doing the "move".

Mty old cache disk is an NMVE 1TB disk, formatted as XFS.

Bought the identical model and formatted it as ZFS. Then created a ZFS pool with this disk.

Disabled VM and docker.

Now set up the user shares to move from the old XFS disk to the new ZFS disk.

Ran "mover". It says "mover is running". However, I cannot see any read/write activity on either of the two disks. And also, the new ZFS disk is still empty.

Attaching diagnostic log.

Appreciate any help!

tower-diagnostics-20250920-1533.zip

Remove the mover tuning plugin and retest, if it still doesn't work, enable mover logging, run the mover, and post new diags and the shares you expect to be moved.

This seems to have been the issue... That's quite annoying as I need the plugin for my workflow. Not for the ZFS/XFS transition though, so let me finish this first. And then I hope that I can use the plugin again. I will give it a try, thanks!

I celebrated too early. It is moving, but it is incredibly slow. So, there still seems to be something wrong. Attaching the logs. Three shares: /appdata, /data, /domains, /iso.

Thanks for looking into it.

tower-diagnostics-20250920-1809.zip

1 hour ago, steve1977 said:

It is moving, but it is incredibly slow

Mover is quite slow when moving many small files, since it checks to see if every file is being used before moving it, so it adds a lot of overhead. This is not noticeable with large files; just wait for it to finish.

Ok... Thanks. It feels though that it may take 48 hours for just 500gb. Not a big deal and I can wait, but love to hear from you whether that's really what's "normal"? Worried that maybe the new disk is faulty and I may lose the data through this moving exercise.

It completed. So seems you were right and it was just incredibly slow.

I have now added the old XFS disk as a second disk to the pool. And it runs (fast). I was surprised that it didn't offer me any options how I'd like to set up the pool? I read somewhere that it will set it up as mirror by default. That's what I want, so should be all good. Just curious where the settings would have been if I had preferred a different setup?

Also, the "old pool" now just "not installed". I don't find the option to just remove it?

Click on the fist pool device and then "remove pool"