diff --git a/datacenter/ucp/2.2/guides/admin/monitor-and-troubleshoot/index.md b/datacenter/ucp/2.2/guides/admin/monitor-and-troubleshoot/index.md
index 6fc18596ce..e8e600ed38 100644
--- a/datacenter/ucp/2.2/guides/admin/monitor-and-troubleshoot/index.md
+++ b/datacenter/ucp/2.2/guides/admin/monitor-and-troubleshoot/index.md
@@ -63,8 +63,6 @@ might be serving your request. Make sure you're connecting directly to the
 URL of a manager node, and not a load balancer. In addition, pinging the
 endpoint with a `HEAD` results in a 404 error code. Use a `GET` request instead.
 
-
-
 ## Where to go next
 
 * [Troubleshoot with logs](troubleshoot-with-logs.md)
diff --git a/datacenter/ucp/3.0/guides/admin/monitor-and-troubleshoot/index.md b/datacenter/ucp/3.0/guides/admin/monitor-and-troubleshoot/index.md
index 6fc18596ce..2eee480e0a 100644
--- a/datacenter/ucp/3.0/guides/admin/monitor-and-troubleshoot/index.md
+++ b/datacenter/ucp/3.0/guides/admin/monitor-and-troubleshoot/index.md
@@ -64,6 +64,10 @@ URL of a manager node, and not a load balancer. In addition, pinging the
 endpoint with a `HEAD` results in a 404 error code. Use a `GET` request instead.
 
 
+## Monitoring disk usage
+
+Web UI disk usage metrics, including free space, only reflect the Docker managed portion of the filesystem: `/var/lib/docker`.  To monitor the total space available on each filesystem of a UCP worker or manager, you must deploy a third party monitoring solution to monitor the operating system.
+
 
 ## Where to go next
 
diff --git a/ee/ucp/admin/configure/collect-cluster-metrics.md b/ee/ucp/admin/configure/collect-cluster-metrics.md
index 274291c8a5..ce869338a6 100644
--- a/ee/ucp/admin/configure/collect-cluster-metrics.md
+++ b/ee/ucp/admin/configure/collect-cluster-metrics.md
@@ -44,6 +44,8 @@ These are metrics about the state of services running on the container platform.
   - Convergence of K8s deployments and Swarm services
   - Cluster load by number of services or containers or pods
 
+Web UI disk usage metrics, including free space, only reflect the Docker managed portion of the filesystem: `/var/lib/docker`. To monitor the total space available on each filesystem of a UCP worker or manager, you must deploy a third party monitoring solution to monitor the operating system.
+
 ## Deploy Prometheus on worker nodes
 
 Universal Control Plane deploys Prometheus by default on the manager nodes to provide a built-in metrics backend. For cluster sizes over 100 nodes or for use cases where scraping metrics from the Prometheus instances are needed, we recommend that you deploy Prometheus on dedicated worker nodes in the cluster.
diff --git a/ee/ucp/admin/monitor-and-troubleshoot/index.md b/ee/ucp/admin/monitor-and-troubleshoot/index.md
index cfc1ff3b85..d269c4dbe9 100644
--- a/ee/ucp/admin/monitor-and-troubleshoot/index.md
+++ b/ee/ucp/admin/monitor-and-troubleshoot/index.md
@@ -70,6 +70,10 @@ To enable this feature, DTR 2.6 is required and single sign-on with UCP must be
 
 ![example of vulnerability information in UCP](../../images/example-of-vuln-data-in-ucp.png)
 
+## Monitoring disk usage
+
+Web UI disk usage metrics, including free space, only reflect the Docker managed portion of the filesystem: `/var/lib/docker`. To monitor the total space available on each filesystem of a UCP worker or manager, you must deploy a third party monitoring solution to monitor the operating system.
+
 ## Where to go next
 
 - [Troubleshoot with logs](troubleshoot-with-logs.md)