diff --git a/man8/cache_check.8 b/man8/cache_check.8
index 5cc7dff..1d53c18 100644
--- a/man8/cache_check.8
+++ b/man8/cache_check.8
@@ -15,6 +15,8 @@ the device-mapper cache target on a
 or
 .I file.
 
+This tool cannot be run on live metadata.
+
 .SH OPTIONS
 .IP "\fB\-q, \-\-quiet\fP"
 Suppress output messages, return only exit code.
diff --git a/man8/cache_dump.8 b/man8/cache_dump.8
index a0c2924..00a6cfc 100644
--- a/man8/cache_dump.8
+++ b/man8/cache_dump.8
@@ -23,6 +23,8 @@ in order to put it back onto a metadata
 (to process by the device-mapper target) or
 .I file.
 
+This tool cannot be run on live metadata.
+
 .IP "\fB\-r, \-\-repair\fP".
 Repair the metadata whilst dumping it.
 
diff --git a/man8/cache_repair.8 b/man8/cache_repair.8
index ef04a7f..b702707 100644
--- a/man8/cache_repair.8
+++ b/man8/cache_repair.8
@@ -26,6 +26,8 @@ If written to a metadata
 , the metadata can be processed
 by the device-mapper target.
 
+This tool cannot be run on live metadata.
+
 .IP "\fB\-i, \-\-input\fP \fI{device|file}\fP"
 Input file or device with binary metadata.
 
diff --git a/man8/cache_restore.8 b/man8/cache_restore.8
index 5f9fdca..d9fd580 100644
--- a/man8/cache_restore.8
+++ b/man8/cache_restore.8
@@ -24,6 +24,8 @@ If restored to a metadata
 .I device
 , the metadata can be processed by the device-mapper target.
 
+This tool cannot be run on live metadata.
+
 .IP "\fB\-i, \-\-input\fP \fI{device|file}\fP"
 Input file or device with metadata.
 
diff --git a/man8/era_check.8 b/man8/era_check.8
index e8610eb..43b3ee0 100644
--- a/man8/era_check.8
+++ b/man8/era_check.8
@@ -15,6 +15,8 @@ the device-mapper era target on a
 or
 .I file.
 
+This tool cannot be run on live metadata.
+
 .SH OPTIONS
 .IP "\fB\-q, \-\-quiet\fP"
 Suppress output messages, return only exit code.
diff --git a/man8/era_dump.8 b/man8/era_dump.8
index 275ad97..b1ad2b6 100644
--- a/man8/era_dump.8
+++ b/man8/era_dump.8
@@ -23,6 +23,8 @@ in order to put it back onto a metadata
 (to process by the device-mapper target) or
 .I file.
 
+This tool cannot be run on live metadata.
+
 .IP "\fB\-r, \-\-repair\fP".
 Repair the metadata whilst dumping it.
 
diff --git a/man8/era_invalidate.8 b/man8/era_invalidate.8
index 8c10728..2e67d4a 100644
--- a/man8/era_invalidate.8
+++ b/man8/era_invalidate.8
@@ -11,6 +11,8 @@ era_invalidate \- Provide a list of blocks that have changed since a particular
 .B era_invalidate
 Examines era metadata and lists blocks that may have changed since a given era.
 
+This tool cannot be run on live metadata.
+
 .SH OPTIONS
 .IP "\fB\-h, \-\-help\fP"
 Print help and exit.
diff --git a/man8/thin_check.8 b/man8/thin_check.8
index 0981d77..f5b6496 100644
--- a/man8/thin_check.8
+++ b/man8/thin_check.8
@@ -15,6 +15,8 @@ the device-mapper thin provisioning target on a
 or
 .I file.
 
+This tool cannot be run on live metadata.
+
 .SH OPTIONS
 .IP "\fB\-q, \-\-quiet\fP"
 Suppress output messages, return only exit code.
diff --git a/man8/thin_delta.8 b/man8/thin_delta.8
index 1ebfcbe..565ad71 100644
--- a/man8/thin_delta.8
+++ b/man8/thin_delta.8
@@ -10,7 +10,8 @@ thin_delta \- Print the differences in the mappings between two thin devices.
 .SH DESCRIPTION
 .B thin_delta
 allows you to compare the mappings in two thin volumes (snapshots allow common blocks between thin volumes).
-.
+
+This tool cannot be run on live metadata unless the \fB\-\-metadata\-snap\fP option is used.
 
 .SH OPTIONS
 .IP "\fB\-\-thin1, \-\-snap1\fP"
diff --git a/man8/thin_dump.8 b/man8/thin_dump.8
index a8c92fe..7a9f785 100644
--- a/man8/thin_dump.8
+++ b/man8/thin_dump.8
@@ -24,13 +24,15 @@ in order to put it back onto a metadata
 (to process by the device-mapper target) or
 .I file.
 
+This tool cannot be run on live metadata unless the \fB\-\-metadata\-snap\fP option is used.
+
 .IP "\fB\-f, \-\-format\fP \fI{xml|human_readable}\fP".
 Print output in XML or human readable format.
 
 .IP "\fB\-r, \-\-repair\fP".
 Repair the metadata whilst dumping it.
 
-.IP "\fB\-m, \-\-metadata_snap\fP [block#]".
+.IP "\fB\-m, \-\-metadata\-snap\fP [block#]".
 Dump metadata snapshot created by device-mapper thin provisioning target.
 If block is not provided, access the default metadata snapshot created by
 the thin provisioning device-mapper target, else try the one at block#.
diff --git a/man8/thin_repair.8 b/man8/thin_repair.8
index 1048de5..a8bd529 100644
--- a/man8/thin_repair.8
+++ b/man8/thin_repair.8
@@ -26,6 +26,8 @@ If written to a metadata
 , the metadata can be processed
 by the device-mapper target.
 
+This tool cannot be run on live metadata.
+
 .IP "\fB\-i, \-\-input\fP \fI{device|file}\fP"
 Input file or device with binary metadata.
 
diff --git a/man8/thin_restore.8 b/man8/thin_restore.8
index 17b2e6e..f4d590d 100644
--- a/man8/thin_restore.8
+++ b/man8/thin_restore.8
@@ -24,6 +24,8 @@ If restored to a metadata
 .I device
 , the metadata can be processed by the device-mapper target.
 
+This tool cannot be run on live metadata.
+
 .IP "\fB\-q, \-\-quiet\fP"
 Suppress output messages, return only exit code.
 
diff --git a/man8/thin_rmap.8 b/man8/thin_rmap.8
index 125e49c..75dfb38 100644
--- a/man8/thin_rmap.8
+++ b/man8/thin_rmap.8
@@ -16,6 +16,8 @@ or
 between a region of thin provisioned pool blocks
 and the associated thin provisioned devices.
 
+This tool cannot be run on live metadata.
+
 .IP "\fB\\-\-region\fP \fI<block range>\fP".
 output reverse map
 
@@ -29,7 +31,7 @@ Output version information and exit.
 output reverse map for pool blocks 5..45 (denotes blocks 5 to 44 inclusive, but not block 45)
 
 .sp
-.B thin_rmap --region 5..45 /dev/vg/pool
+.B thin_rmap --region 5..45 /dev/pool-metadata
 
 .SH DIAGNOSTICS
 .B thin_rmap
diff --git a/man8/thin_trim.8 b/man8/thin_trim.8
index de702f0..050135a 100644
--- a/man8/thin_trim.8
+++ b/man8/thin_trim.8
@@ -9,9 +9,9 @@ thin_trim \- Issue discard requests for free pool space (offline tool).
 
 .SH DESCRIPTION
 .B thin_trim
-sends discard requests to the pool device for unprovisioned areas.  It is an offline tool, 
-.B do not run it while the pool is active
-.
+sends discard requests to the pool device for unprovisioned areas.
+
+This tool cannot be run on live metadata.
 
 .SH OPTIONS
 .IP "\fB\-\-pool-inactive\fP"