diff --git a/release/doc/en_US.ISO8859-1/relnotes/article.sgml b/release/doc/en_US.ISO8859-1/relnotes/article.sgml
index 1d3e0d588ae..b963ef09843 100644
--- a/release/doc/en_US.ISO8859-1/relnotes/article.sgml
+++ b/release/doc/en_US.ISO8859-1/relnotes/article.sgml
@@ -1437,7 +1437,9 @@
     <para>The default number of cylinders per group in &man.newfs.8;
     is now computed to be the maximum allowable given the current
     filesystem parameters.  It can be overridden with the
-    <option>-c</option>.  Formerly, the default was fixed at 16.</para>
+    <option>-c</option>.  Formerly, the default was fixed at 16.  This
+    change leads to better &man.fsck.8; performance and reduced
+    fragmentation.</para>
 
     <para>A number of buffer overflows in &man.config.8; have been
     fixed. &merged;</para>
diff --git a/release/doc/en_US.ISO8859-1/relnotes/common/new.sgml b/release/doc/en_US.ISO8859-1/relnotes/common/new.sgml
index 1d3e0d588ae..b963ef09843 100644
--- a/release/doc/en_US.ISO8859-1/relnotes/common/new.sgml
+++ b/release/doc/en_US.ISO8859-1/relnotes/common/new.sgml
@@ -1437,7 +1437,9 @@
     <para>The default number of cylinders per group in &man.newfs.8;
     is now computed to be the maximum allowable given the current
     filesystem parameters.  It can be overridden with the
-    <option>-c</option>.  Formerly, the default was fixed at 16.</para>
+    <option>-c</option>.  Formerly, the default was fixed at 16.  This
+    change leads to better &man.fsck.8; performance and reduced
+    fragmentation.</para>
 
     <para>A number of buffer overflows in &man.config.8; have been
     fixed. &merged;</para>