diff --git a/libisoburn/trunk/xorriso/xorriso.1 b/libisoburn/trunk/xorriso/xorriso.1
index 57fc21d1..a2913231 100644
--- a/libisoburn/trunk/xorriso/xorriso.1
+++ b/libisoburn/trunk/xorriso/xorriso.1
@@ -1844,6 +1844,11 @@ Theoretical limits are higher but in practice the media deteriorate more early.
 It might also be that your operating system has a session limit with mount.
 Always have a blank media ready to perform a full backup in case the update
 attempt fails. An overview of sessions is given by option -toc.
+.br
+\fBBetter do not use your youngest backup for -update_r\fR.
+Have at least two media which you use alternating. So only older backups
+get endangered by the new write operation, while the newest backup is
+stored safely on a different media.
 .br 
 If you have enough re-useable media for a round-robin scheme then better do
 full backups with blank media each time. Blanking can be achieved by