diff --git a/content/concepts/metrics.md b/content/concepts/metrics.md
index 7ab633c..9e072ed 100644
--- a/content/concepts/metrics.md
+++ b/content/concepts/metrics.md
@@ -43,10 +43,41 @@ To scrape data in Prometheus, each node must be accessible by port `10443`.
 
 DirectPV node server exports the following metrics:
 
-- directpv_stats_bytes_used
-- directpv_stats_bytes_total
+- `directpv_stats_bytes_used`
 
-These metrics are categorized by labels ['tenant', 'volumeID', 'node'] and represent the volume stats of the published volumes.
+  Total number of bytes used by the volume
+
+- `directpv_stats_bytes_total`
+
+  Total number of bytes allocated to the volume
+
+The following additional metrics are available in release 4.0.17 or later.
+
+- `directpv_stats_drive_ready`
+  
+  Provides the drive status, either online or offline
+
+- `directpv_stats_drive_total_read_bytes`
+
+  Total number of bytes read from the drive
+
+- `directpv_stats_drive_total_write_bytes`
+
+  Total number of bytes written to the drive
+
+- `directpv_stats_drive_read_latency_seconds`
+
+  Drive read latency, in seconds
+
+- `directpv_stats_drive_write_latency_seconds`
+
+  Drive write latency, in seconds
+
+- `directpv_stats_drive_wait_time_seconds`
+
+  Drive Wait Time, in seconds
+
+These metrics are categorized by labels [`drive`, `tenant`, `volumeID`, `node`] and represent the volume stats of the published volumes.
 
 ## Configuration
 
diff --git a/content/installation/upgrade.md b/content/installation/upgrade.md
index 32c91b6..40583b5 100644
--- a/content/installation/upgrade.md
+++ b/content/installation/upgrade.md
@@ -19,6 +19,17 @@ DirectPV continues to support `PodSecurityPolicy` in the 4.0.x versions.
 DirectPV 4.1.x and later removed support for `PodSecurityPolicy`.
 {{< /admonition >}}
 
+## Version support
+
+Version **4.1.x** is the latest lineage of open source DirectPV CSI Driver.
+Most users should install or upgrade to the latest release in this lineage.
+However, if you require continued use of the deprecated `PodSecurityPolicy` feature, be sure to follow the upgrade guide carefully.
+
+Version **4.0.x** lineage entered maintenance mode on January 1, 2025.
+There is no future development of this lineage expected, though it may continue to receive bug fix and security releases from time to time.
+
+Versions older than 4.0.0 are no longer supported.
+
 ## Upgrade DirectPV CSI Driver from 4.x.x to latest
 
 ### Offline upgrade