diff --git a/include/dmraid/lib_context.h b/include/dmraid/lib_context.h
index c2e16e6..c2b3c4d 100644
--- a/include/dmraid/lib_context.h
+++ b/include/dmraid/lib_context.h
@@ -46,7 +46,8 @@ enum lc_options {
 	LC_CREATE,
 	LC_REBUILD_SET,
 	LC_REBUILD_DISK,
-	LC_HOT_SPARE_SET,	/* Add new options below this one ! */
+	LC_HOT_SPARE_SET,	
+	LC_DEFER_UPDATE,	/* Add new options below this one ! */
 	LC_OPTIONS_SIZE,	/* Must be the last enumerator. */
 };
 
@@ -67,6 +68,7 @@ enum lc_options {
 #define	OPT_CREATE(lc)		(lc_opt(lc, LC_CREATE))
 #define OPT_HOT_SPARE_SET(lc)	(lc_opt(lc, LC_HOT_SPARE_SET))
 #define OPT_REBUILD_DISK(lc)	(lc_opt(lc, LC_REBUILD_DISK))
+#define OPT_DEFER_UPDATE(lc)	(lc_opt(lc, LC_DEFER_UPDATE))
 
 /* Return option value. */
 #define	OPT_STR(lc, o)		(lc->options[o].arg.str)
@@ -76,6 +78,7 @@ enum lc_options {
 #define	OPT_STR_PARTCHAR(lc)	OPT_STR(lc, LC_PARTCHAR)
 #define OPT_STR_HOT_SPARE_SET(lc)	OPT_STR(lc, LC_HOT_SPARE_SET)
 #define OPT_STR_REBUILD_DISK(lc)	OPT_STR(lc, LC_REBUILD_DISK)
+#define OPT_STR_DEFER_UPDATE(lc)	OPT_STR(lc, LC_DEFER_UPDATE)
 
 struct lib_version {
 	const char *text;
diff --git a/lib/metadata/reconfig.c b/lib/metadata/reconfig.c
index 73f7604..19768a9 100644
--- a/lib/metadata/reconfig.c
+++ b/lib/metadata/reconfig.c
@@ -249,9 +249,9 @@ add_dev_to_raid(struct lib_context *lc, struct raid_set *rs,
 			strncat(lib_name, ".so", 3);
 		} else
 			goto err;
-
+		
 		/* Check registration */
-		if (!dm_monitored_events(&pending, sub_rs->name, lib_name)) {
+		if (!dm_monitored_events(&pending, sub_rs->name, lib_name) && !OPT_DEFER_UPDATE(lc)) {
 			/* If NOT registered update metadata to OK state. */
 			if (check_rd->fmt->metadata_handler)
 				check_rd->fmt->metadata_handler(lc, UPDATE_REBUILD_STATE, NULL, (void *) rs);
diff --git a/man/dmraid.8 b/man/dmraid.8
index b4de737..62a6091 100644
--- a/man/dmraid.8
+++ b/man/dmraid.8
@@ -11,6 +11,7 @@ dmraid \- discover, configure and activate software (ATA)RAID
  [-Z|--rm_partitions]
  [--separator SEPARATOR]
  [-t|--test]
+ [-u|--update_defer]
  [RAID-set...]
 
 .B dmraid
@@ -38,6 +39,7 @@ dmraid \- discover, configure and activate software (ATA)RAID
  {-R| --rebuild}
  RAID-set
  [device-path]
+ [-u|--update_defer]
 
 .B dmraid
  {-x| --remove}
@@ -118,7 +120,14 @@ underlying the set, ie if sda is part of the set, remove sda1, sda2, etc.
 This prevents applications from directly accessiong the disks bypassing dmraid.
 RAID set names given on command line don't need to be fully specified
 (eg, "dmraid -ay sil" would activate all discovered Silicon Image Medley
-RAID sets).
+RAID sets). Option 
+.B -u
+defers metadata update in case of rebuild is triggered parallelly with activation.
+Awoids metadata update to "OK" state if volume is not registered to the event
+monitoring. 
+Useful if volume is activating at early stage of booting process when registration
+to the event monitoring is impossible.
+
 
 .TP
 .I {-b|--block_devices} [device-path...]
@@ -208,7 +217,11 @@ Use CHAR as the separator between the device name and the partition number.
 .I {-R| --rebuild} RAID-set [device-path]
 Rebuild raid array after a drive has failed and a new drive is added. 
 For Intel chipset based systems, there are two methods in which a new drive 
-is added to the system.
+is added to the system. Option
+.B -u
+defers metadata update in case of rebuild is triggered. 
+Awoids metadata update to "OK" state if volume is not registered to the event
+monitoring. 
 
 1. Using OROM to identify a new drive
     During system reboot, enter OROM and mark the new drive as the rebuild drive.  
diff --git a/tools/commands.c b/tools/commands.c
index 4c71ae1..a3c77d2 100644
--- a/tools/commands.c
+++ b/tools/commands.c
@@ -30,7 +30,7 @@ int add_dev_to_array(struct lib_context *lc, struct raid_set *rs,
 /*
  * Command line options.
  */
-static char const *short_opts = "a:hipP:"
+static char const *short_opts = "a:hipP:u"
 #ifndef	DMRAID_MINI
 	"bc::dDEf:glxM:"
 #ifdef	DMRAID_NATIVE_LOG
@@ -46,6 +46,7 @@ static struct option long_opts[] = {
 	{"format", required_argument, NULL, 'f'},
 	{"partchar", required_argument, NULL, 'P'},
 	{"no_partitions", no_argument, NULL, 'p'},
+	{"update_defer", no_argument, NULL, 'u'},
 # ifndef DMRAID_MINI
 	{"block_devices", no_argument, NULL, 'b'},
 	{"display_columns", optional_argument, NULL, 'c'},
@@ -197,6 +198,15 @@ check_part_separator(struct lib_context *lc, int arg)
 	return lc_stralloc_opt(lc, LC_PARTCHAR, optarg) ? 1 : 0;
 }
 
+/* Defer any mtadata updates in case of volume activation 
+ * at early stage of OS boot */
+static int
+defer_update(struct lib_context *lc, int arg)
+{
+    	lc_inc_opt(lc, arg);
+	return 1;
+}
+
 /* Display help information */
 static int
 help(struct lib_context *lc, int arg)
@@ -211,6 +221,7 @@ help(struct lib_context *lc, int arg)
 		  "\t[-P|--partchar CHAR]\n"
 		  "\t[-p|--no_partitions]\n"
 		  "\t[-Z|--rm_partitions]\n"
+		  "\t[-d|--update_defer]\n"
 		  "\t[--separator SEPARATOR]\n" "\t[RAID-set...]\n", c);
 	log_print(lc, "%s\t{-h|--help}\n", c);
 	log_print(lc, "%s\t{-V/--version}\n", c);
@@ -219,11 +230,12 @@ help(struct lib_context *lc, int arg)
 	log_print(lc,
 		  "* = [-d|--debug]... [-v|--verbose]... [-i|--ignorelocking]\n");
 	log_print(lc,
-		  "%s\t{-a|--activate} {y|n|yes|no} *\n"
+		  "%s\t{-a|--activate} {y|n|yes|no} \n"
 		  "\t[-f|--format FORMAT[,FORMAT...]]\n"
 		  "\t[-P|--partchar CHAR]\n" "\t[-p|--no_partitions]\n"
 		  "\t[--separator SEPARATOR]\n" "\t[-t|--test]\n"
-		  "\t[-Z|--rm_partitions] [RAID-set...]\n", c);
+		  "\t[-Z|--rm_partitions] [RAID-set...]\n"
+		  "\t[-u|--update_defer]", c);
 	log_print(lc,
 		  "%s\t{-b|--block_devices} *\n"
 		  "\t[-c|--display_columns][FIELD[,FIELD...]]...\n"
@@ -255,7 +267,8 @@ help(struct lib_context *lc, int arg)
 		  "\t[--str[i[de]] [0-9]...[kK][bB]]\n"
 		  "\t{--disk[s] \"device-path[, device-path...\"}\n", c);
 	log_print(lc, "%s\t{-x|--remove RAID-set} \n");
-	log_print(lc, "%s\t{-R|--rebuild} RAID-set [drive_name]\n", c);
+	log_print(lc, "%s\t{-R|--rebuild} RAID-set [drive_name]\n"
+		  "\t[-u|--update_defer]", c);
 	log_print(lc, "%s\t[{-f|--format FORMAT}]\n"
 		  "\t{-S|--spare [RAID-set]} \n"
 		  "\t{-M|--media \"device-path\"}\n", c);
@@ -285,6 +298,19 @@ static struct actions actions[] = {
 	 0,
 	 },
 
+	/* Defer metadata update */
+	{'u',
+	 UNDEF,
+	 UNDEF,
+	 ACTIVATE | REBUILD
+#ifndef DMRAID_MINI
+	 | DBG | TEST | VERBOSE
+#endif
+	 , NO_ARGS,
+	 defer_update,
+	 LC_DEFER_UPDATE,
+	 },
+
 	/* Format option. */
 	{'f',
 	 FORMAT,
@@ -726,7 +752,7 @@ handle_args(struct lib_context *lc, int argc, char ***argv)
 		if (o == 'C') {
 			*argv += optind - 1;
 			return 1;
-		} else if (o == 'R' && argc == 4) {
+		} else if (o == 'R' && (argc == 4 || argc == 5)) {
 			if (*(*argv + optind))
 				save_drive_name(lc, *(*argv + optind));
 		}
@@ -744,7 +770,7 @@ handle_args(struct lib_context *lc, int argc, char ***argv)
 		ret = check_actions_arguments(lc);
 
 	*argv += optind;
-	if (argc == 4 && lc->options[LC_REBUILD_SET].opt)
+	if ((argc == 4 || argc == 5) && lc->options[LC_REBUILD_SET].opt)
 		*argv += 1;
 
 	return ret;
@@ -871,7 +897,7 @@ struct prepost prepost[] = {
 	 0,
 	 activate_or_deactivate_sets,
 	 },
-
+	
 #ifndef DMRAID_MINI
 	/* Display block devices. */
 	{BLOCK_DEVICES,
-- 
1.7.0.4