From f162d59bf6da9a3e930f8498e6b41c6029be1920 Mon Sep 17 00:00:00 2001
From: Thanos Makatos <thanos.makatos@onapp.com>
Date: Fri, 4 Mar 2016 18:30:02 +0300
Subject: [PATCH] no need to supply held root, thin_dump -m will look it up

---
 README.md | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/README.md b/README.md
index ce83bd7..005ae50 100644
--- a/README.md
+++ b/README.md
@@ -140,16 +140,9 @@ the metadata:
 
 	$ dmsetup message vg001-mythinpool-tpool 0 reserve_metadata_snap
 
-Then, extract the held root from the device mapper's status of the thin pool
-(7th field). This value must be passed to ```thin_dump```.
-
-	$ sudo dmsetup status vg001-mythinpool-tpool
-	0 8192 thin-pool 2 11/1024 1/64 10 rw discard_passdown
-	                                ^
-
 Extract the metadata:
 
-	$ sudo bin/thin_dump -m10 /dev/mapper/vg001-mythinpool_tmeta
+	$ 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"/>