diff --git a/Update-recommendations-and-troubleshooting.md b/Update-recommendations-and-troubleshooting.md
index 8ac4bae..a7a9118 100644
--- a/Update-recommendations-and-troubleshooting.md
+++ b/Update-recommendations-and-troubleshooting.md
@@ -164,6 +164,18 @@ systemctl start mariadb # or mysqld
 systemctl enable mariadb # only necessary for RHEL/CentOS not doing so by installing the DB
 systemctl status mariadb
 docker-compose up -d
+
+```
+# Docker on Btrfs
+Running Docker on a Btrfs partition causes a problem: Old images are not deleted and the partition fills up over time.
+Here is a (long) thread on this topic:
+https://github.com/moby/moby/issues/27653
+So it is currently (12.2019) not recommended to run Docker on Btrfs. Otherwise, regular checks and manual cleanup are necessary.
+If someone has a solution, we ask for feedback in the forum.
+
+
+
+
 ```
 # How to get help
 EGroupware GmbH - the developers of EGroupware - offer the following support options, if you can not figure it out by yourself: