diff --git a/faq.html b/faq.html
index 3d470336..d3c4ff97 100644
--- a/faq.html
+++ b/faq.html
@@ -445,11 +445,15 @@ For the data disks, follow these suggestions:
 </tr>
 <tr>
 <td>Btrfs</td>
-<td>OK. But ensure to build SnapRAID with the libblkid library to get UUID support.
-You will be warned at every run if this doesn't happen.</td>
+<td>OK. Ensure to build SnapRAID with the libblkid library to get UUID support.
+You will be warned at every run if this doesn't happen.
+Note that multiple Btrfs snapshots are not supported.
+</td>
 </tr>
 <td>ZFS</td>
-<td>Partial. You won't get UUID support, but this doesn't prevent the core SnapRAID functionalities.</td>
+<td>Partial. You won't get UUID support, but this doesn't prevent the use of the core SnapRAID functionalities.
+Note that multiple ZFS snapshots are not supported.
+</td>
 </tr>
 <tr>
 <td>ReiserFS</td>