[release-notes] added admonition for bcache best practices based on feedback from change owner

[Pete Travis]

commit 63b483d7269743078609eaec74662f3fc57a71da
Author: Pete Travis <immanetize at fedoraproject.org>
Date:   Wed Oct 30 21:30:24 2013 -0600

    added admonition for bcache best practices based on feedback from change owner

 en-US/File_Systems.xml |   11 +++++++----
 1 files changed, 7 insertions(+), 4 deletions(-)
---
diff --git a/en-US/File_Systems.xml b/en-US/File_Systems.xml
index 0917485..1a7772f 100644
--- a/en-US/File_Systems.xml
+++ b/en-US/File_Systems.xml
@@ -17,8 +17,14 @@
       <see>bcache</see>
     </indexterm>
     <para>
-      Fedora 20 offers experimental support for adding solid state drives as fast, transparent caches to traditional rotating storage. Filesystems on the cache-backed block devices offer both speed and volume. The cache can be added to fresh or existing standard partitions and LVM storage. 
+      Fedora 20 offers experimental support for adding solid state drives (SSDs) as fast, transparent caches to traditional rotating storage (HDDs). Filesystems on the SSD cached block devices offer both the speed of SSDs and volume of HDDs.  Both traditional and LVM partitioning schemes can benefit from this functionality.
     </para>
+    <note>
+      <title>Make backups!</title>
+      <para>
+	Always back up your data before making low level changes, such as migrating to a bcache device. Until tools like <ulink url="https://github.com/g2p/blocks">blocks</ulink> are packaged for Fedora, users are advised to implement bcache by creating clean bcache devices and populating thier filesystems from a recent backup.
+      </para>
+    </note>
     <para>
       Learn more about this functionality, called <firstterm>bcache</firstterm>, from:
       <simplelist>
@@ -34,9 +40,6 @@
 	<member>
 	  <ulink url="https://fedoraproject.org/wiki/Test_Day:2013-10-13_SSD_Cache" />
 	</member>
-	<member>
-	  <ulink url="https://github.com/g2p/blocks" />
-	</member>
       </simplelist>
     </para>