Greyhole plugin install is not possible | unionfilesystems can't add new shares

If I try to install the greyhole plugin via webinterface, it fails with the following error message:

The following packages have unmet dependencies:
 openmediavault-greyhole : Depends: openmediavault (= 3.0.13) but 3.0.31 is to be installed
E: Unable to correct problems, you have held broken packages.

According to OMV Extras homepage, the erasmus-greyhole repo is listed as stable.

I also tried to use unionfilesystems, but there I can not add a new share for the created drive pool.
If I want to pick a drive, I get the following error message:

Couldn't extract an UUID from the provided path

System info:
OMV 3.0.31
Debian 3.16.7-ctk25-2+deb8u3
Host: ESXi 6 Update 2

If I take a look at the plugin menu, it displays unionfilesystems 3.1.4. I can try again to install it.

But in general, unionfilesystems should work with OMV 3.0.31? Is it possible to use afs mit mfs? Do I have to setup anything or choose any options at the creation of the drive pool?

Thanks for the quick reply.

Is it possible to use afs and mfs? Or do I have to choose a different option?

Perfect, it's working with mergerfs.
Samba wasn't working, until I added "defaults,allow_other" to the options at unionfilesystems.

But the DrivePool appears empty? If I take a look at the filesystems tab with the webinterface it shows the correct amount of space usage.

I would like to use the DrivePool with some drives, which already have existing data on it.

Do I have to manually move the files? Or did I setup anything wrong?

I see the union mount point, but the folder is also empty. I did not get what you said regarding the uuid.
But if I take a look at the filesystems via webui, the drive of the mergerfs DrivePool is mentioned there as false. But it displays the correct amount of disk usage.

If I create a new folder via Windows on the DrivePool, it also corretly adds the folder on the corresponding drive.
So probably the solution is to create a DrivePool folder on each drive and move the data to that folder?

My Solution:
Adding the DrivePool folder on each drive and moving files manually worked out. Dont forget to set the correct chmod manually.

No problem at all. You're answering very quick in that forum! Big compliment to all!

After creating the DrivePool folder on each drive and moving the data into that folder, everything is working fine.