diff --git a/README.md b/README.md
index 4471942..dbabd74 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,17 @@
# openhab-docker
For of https://github.com/openhab/openhab-docker but without healthcheck
+
+The HEALTHCHECK causes docker to write to disk every 30 seconds which prevents disk hibernation on NAS.
+
+Example log in file `config.v2.json`:
+
+ "Health": {
+ "Status": "healthy",
+ "FailingStreak": 0,
+ "Log": [
+ {
+ "Start": "2019-10-04T16:42:07.855025309+02:00",
+ "End": "2019-10-04T16:42:08.036342122+02:00",
+ "ExitCode": 0,
+ "Output": " % Total % Received % Xferd Average Speed Time Time Time Current\n Dload Upload Total Spent Left Speed\n\r 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0\r100 1000 100 1000 0 0 488k 0 --:--:-- --:--:-- --:--:-- 488k\nopenHAB"
+ },