Deduplication info not visible for volumes in storage manager

[ThomasGoering]

I successfully enabled btrfs data deduplication for my two hdd volumes with the script on my DS920+ running DSM 7.2.1-69057 Update 3. I use it for my two volumes that are on hdd-only storage pools and it seems that it is working fine.

But I don't see any deduplication info. I just see file system and total capacity. Deduplication status and savings are missing.

From what I found out so far in file storage_panel.js, it seems that this.dedup_info.show is always false. Even if it would be true it wouldn't display the correct status because this.dedup_info.status is "disable" (but it should be "auto" for two volumes). Unfortunately I have not found out where these values come from.

Is something missing on my DS920+? It would be great if the deduplication info can be displayed in storage manager.