Index: sys/contrib/openzfs/cmd/zpool/zpool_main.c
===================================================================
--- sys/contrib/openzfs/cmd/zpool/zpool_main.c
+++ sys/contrib/openzfs/cmd/zpool/zpool_main.c
@@ -2254,6 +2254,12 @@
 			break;
 		}
 		color_end();
+        } else if (children == 0 && !isspare &&
+	    VDEV_STAT_VALID(vs_physical_ashift, vsc) &&
+	    vs->vs_configured_ashift < vs->vs_physical_ashift) {
+		(void) printf(
+		    gettext("  block size: %dB configured, %dB native"),
+		    1 << vs->vs_configured_ashift, 1 << vs->vs_physical_ashift);
 	}
 
 	/* The root vdev has the scrub/resilver stats */