diff --git a/README.md b/README.md
index d23dae5..005ae50 100644
--- a/README.md
+++ b/README.md
@@ -130,3 +130,28 @@ Once you've done this you can run the tests with a simple:
 Or specific tests with:
 
     cucumber features/thin_restore -n 'print help'
+
+
+Dump Metadata
+=============
+
+To dump the metadata of a live thin pool, you must first create a snapshot of
+the metadata:
+
+	$ dmsetup message vg001-mythinpool-tpool 0 reserve_metadata_snap
+
+Extract the metadata:
+
+	$ sudo bin/thin_dump -m /dev/mapper/vg001-mythinpool_tmeta
+	<superblock uuid="" time="1" transaction="2" data_block_size="128"nr_data_blocks="0">
+	    <device dev_id="1" mapped_blocks="1" transaction="0" creation_time="0" snap_time="1">
+	        <single_mapping origin_block="0" data_block="0" time="0"/>
+	    </device>
+	    <device dev_id="2" mapped_blocks="1" transaction="1" creation_time="1" snap_time="1">
+	        <single_mapping origin_block="0" data_block="0" time="0"/>
+	    </device>
+	</superblock>
+
+Finally, release the root:
+
+	$ dmsetup message vg001-mythinpool-tpool 0 release_metadata_snap