From 42814db0bcaf965d525b1b5aa75a190f15796e63 Mon Sep 17 00:00:00 2001
From: XuWei <xwbj@cn.ibm.com>
Date: Thu, 3 Nov 2016 03:33:02 -0400
Subject: [PATCH] modified xcatprobe discovery usage

---
 xCAT-probe/subcmds/discovery | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/xCAT-probe/subcmds/discovery b/xCAT-probe/subcmds/discovery
index a798bd8d0..5a4a1cd82 100755
--- a/xCAT-probe/subcmds/discovery
+++ b/xCAT-probe/subcmds/discovery
@@ -39,12 +39,15 @@ my $program_name = basename("$0");
 $::USAGE = "Usage:
     $program_name -h
     $program_name -n <node_range> -m <discovery_type> [-t <max_waiting_time>] [-V] [--noprecheck] 
+    $program_name -n <node_range> -m <discovery_type> -r <roll_back_duration> [-V] [--noprecheck]
 
 Description:
-    Probe the discovery process, including pre-check for required configuration and realtime monitor of discovery process. 
-    If all pre-check items pass, $program_name will go to monitor directly, otherwise $program_name will exit.  
-    In order to do realtime monitor, $program_name probe must be run along with the node discovery procedure. Trigger this command before triggering node discovery procedure.
-    Currently, this command does not support hierarchy.
+    Probe the discovery process, including pre-check for required configuration, 'Realtime monitor' and 'Replay history' of discovery process. 
+    If all pre-check items failed, $program_name will exit.  
+    Realtime monitor: This is a default. This tool with monitor discovery state of the node. Trigger 'Realtime monitor' before rebooting target node to do discovery.
+    Replay history: Used after discovery is finished to probe the previously completed discovery.
+
+    [NOTE] Currently, hierarchial structure is not supported.
 
 Options:
     -h : Get usage information of $program_name.
@@ -53,6 +56,9 @@ Options:
     -n : The range of predefined nodes, must be used with option -m.
     --noprecheck : skip pre-checking discovery to validate correct configuration. 
     -t : The maximum time to wait when doing monitor, unit is minutes. default is 60.
+    -r : Trigger 'Replay history' mode. Follow the duration of rolling back. Units are 'h' (hour) or 'm' (minute)
+         Supported format examples: 3h30m (3 hours and 30 minutes ago), 2h (2 hours ago), 40m (40 minutes ago) and 3 (3 hours ago).
+         If unit is not specified, hour will be used by default.
 ";
 
 #----------------------------------------------