diff --git a/HowtoCeph.md b/HowtoCeph.md
index ae539df6..09453a61 100644
--- a/HowtoCeph.md
+++ b/HowtoCeph.md
@@ -590,4 +590,6 @@ ceph df
 
 ~~~
 virsh migrate --live --unsafe --verbose first qemu+ssh://$IP_DST/system
-~~~
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+~~~
+
+Le cache RBD doit être activé.
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