X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Ftests%2Fsanity-scrub.sh;h=c84ce25a447e2ea09aa4292ec011c4f061ee1a35;hp=4dbf1b139d2ea599556eb8faf7e683e21071e62a;hb=332ec6a585f54eb7b3694ff6f939cd6d8159e6ba;hpb=0bc85700a2e41f369173e92bbe06b27ed1145618

diff --git a/lustre/tests/sanity-scrub.sh b/lustre/tests/sanity-scrub.sh
index 4dbf1b1..c84ce25 100644
--- a/lustre/tests/sanity-scrub.sh
+++ b/lustre/tests/sanity-scrub.sh
@@ -8,6 +8,7 @@ set -e
 
 ONLY=${ONLY:-"$*"}
 ALWAYS_EXCEPT="$SANITY_SCRUB_EXCEPT"
+
 [ "$SLOW" = "no" ] && EXCEPT_SLOW=""
 # UPDATE THE COMMENT ABOVE WITH BUG NUMBERS WHEN CHANGING ALWAYS_EXCEPT!
 
@@ -19,114 +20,363 @@ init_logging
 
 require_dsh_mds || exit 0
 
+load_modules
+
+if ! check_versions; then
+	skip "It is NOT necessary to test scrub under interoperation mode"
+	exit 0
+fi
+
+cleanupall
+
 SAVED_MDSSIZE=${MDSSIZE}
 SAVED_OSTSIZE=${OSTSIZE}
+SAVED_OSTCOUNT=${OSTCOUNT}
+
 # use small MDS + OST size to speed formatting time
 # do not use too small MDSSIZE/OSTSIZE, which affect the default journal size
-MDSSIZE=100000
-OSTSIZE=100000
+# 400M MDT device can guarantee uninitialized groups during the OI scrub
+MDSSIZE=400000
+OSTSIZE=200000
 
-MOUNT_2=""
-check_and_setup_lustre
+# no need too many OSTs, to reduce the format/start/stop overhead
+[ $OSTCOUNT -gt 4 ] && OSTCOUNT=4
 
-[ $(facet_fstype $SINGLEMDS) != ldiskfs ] &&
-	skip "test OI scrub only for ldiskfs" && check_and_cleanup_lustre &&
-	exit 0
-[[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.2.90) ]] &&
-	skip "Need MDS version at least 2.2.90" && check_and_cleanup_lustre &&
-	exit 0
-
-[[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.3.90) ]] &&
-	ALWAYS_EXCEPT="$ALWAYS_EXCEPT 1a"
+# build up a clean test environment.
+REFORMAT="yes" check_and_setup_lustre
 
 build_test_filter
 
 MDT_DEV="${FSNAME}-MDT0000"
 OST_DEV="${FSNAME}-OST0000"
-MDT_DEVNAME=$(mdsdevname ${SINGLEMDS//mds/})
-START_SCRUB="do_facet $SINGLEMDS $LCTL lfsck_start -M ${MDT_DEV}"
+
+scrub_start() {
+	local error_id=$1
+	local n
+
+	# use "lfsck_start -A" when we no longer need testing interop
+	for n in $(seq $MDSCOUNT); do
+		do_facet mds$n $LCTL lfsck_start -M $(facet_svc mds$n) \
+			-t scrub "$@" ||
+			error "($error_id) Failed to start OI scrub on mds$n"
+	done
+}
+
+scrub_stop() {
+	local error_id=$1
+	local n
+
+	# use "lfsck_stop -A" when we no longer need testing interop
+	for n in $(seq $MDSCOUNT); do
+		do_facet mds$n $LCTL lfsck_stop -M $(facet_svc mds$n) ||
+			error "($error_id) Failed to stop OI scrub on mds$n"
+	done
+}
+
+scrub_status() {
+	local n=$1
+
+	do_facet mds$n $LCTL get_param -n osd-*.$(facet_svc mds$n).oi_scrub
+}
+
+START_SCRUB="do_facet $SINGLEMDS $LCTL lfsck_start -M ${MDT_DEV} -t scrub"
+START_SCRUB_ON_OST="do_facet ost1 $LCTL lfsck_start -M ${OST_DEV} -t scrub"
 STOP_SCRUB="do_facet $SINGLEMDS $LCTL lfsck_stop -M ${MDT_DEV}"
 SHOW_SCRUB="do_facet $SINGLEMDS \
-		$LCTL get_param -n osd-ldiskfs.${MDT_DEV}.oi_scrub"
+		$LCTL get_param -n osd-*.${MDT_DEV}.oi_scrub"
 SHOW_SCRUB_ON_OST="do_facet ost1 \
-		$LCTL get_param -n osd-ldiskfs.${OST_DEV}.oi_scrub"
+		$LCTL get_param -n osd-*.${OST_DEV}.oi_scrub"
 MOUNT_OPTS_SCRUB="-o user_xattr"
 MOUNT_OPTS_NOSCRUB="-o user_xattr,noscrub"
 
 scrub_prep() {
 	local nfiles=$1
+	local inject=$2
+	local n
+
+	check_mount_and_prep
+
+	echo "preparing... $(date)"
+	for n in $(seq $MDSCOUNT); do
+		echo "creating $nfiles files on mds$n"
+		test_mkdir -i $((n - 1)) -c1 $DIR/$tdir/mds$n ||
+			error "Failed to create directory mds$n"
+		cp $LUSTRE/tests/*.sh $DIR/$tdir/mds$n ||
+			error "Failed to copy files to mds$n"
+		mkdir -p $DIR/$tdir/mds$n/d_$tfile ||
+			error "mkdir failed on mds$n"
+		touch $DIR/$tdir/mds$n/d_$tfile/f1 > \
+			/dev/null || error "create failed on mds$n"
+		dd if=/dev/zero of=$DIR/$tdir/mds$n/d_$tfile/f2 bs=1M count=1 ||
+		       	error "write failed on mds$n"
+		if [[ $nfiles -gt 0 ]]; then
+			createmany -m $DIR/$tdir/mds$n/$tfile $nfiles > \
+				/dev/null || error "createmany failed on mds$n"
+		fi
+	done
+	echo "prepared $(date)."
 
-	echo "formatall"
-	formatall > /dev/null
-	echo "setupall"
-	setupall > /dev/null
+	[ ! -z $inject ] && [ $inject -eq 2 ] && {
+		#define OBD_FAIL_OSD_NO_OI_ENTRY	0x198
+		do_nodes $(comma_list $(mdts_nodes)) \
+				$LCTL set_param fail_loc=0x198
+
+		for n in $(seq $MDSCOUNT); do
+			cp $LUSTRE/tests/runas $DIR/$tdir/mds$n ||
+				error "Fail to copy runas to MDS$n"
+		done
+
+		do_nodes $(comma_list $(mdts_nodes)) $LCTL set_param fail_loc=0
+	}
 
-	echo "preparing... ${nfiles} files will be created."
-	mkdir -p $DIR/$tdir
-	cp $LUSTRE/tests/*.sh $DIR/$tdir/
-	[[ $nfiles -gt 0 ]] && { createmany -o $DIR/$tdir/$tfile $nfiles ||
-				error "createmany failed"; }
+	[ ! -z $inject ] && [ $inject -eq 1 ] &&
+		[ $(facet_fstype $SINGLEMDS) = "zfs" ] && {
+		#define OBD_FAIL_OSD_FID_MAPPING	0x193
+		do_nodes $(comma_list $(mdts_nodes)) \
+			$LCTL set_param fail_loc=0x193
+
+		for n in $(seq $MDSCOUNT); do
+			chmod 0400 $DIR/$tdir/mds$n/test-framework.sh
+			chmod 0400 $DIR/$tdir/mds$n/sanity-scrub.sh
+		done
+
+		do_nodes $(comma_list $(mdts_nodes)) $LCTL set_param fail_loc=0
+	}
 
-	echo "prepared."
 	cleanup_mount $MOUNT > /dev/null || error "Fail to stop client!"
-	echo "stop $SINGLEMDS"
-	stop $SINGLEMDS > /dev/null || error "Fail to stop MDS!"
+
+	# sync local transactions on every MDT
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"$LCTL set_param -n osd*.*MDT*.force_sync=1"
+
+	# wait for a while to cancel update logs after transactions committed.
+	sleep 3
+
+	# sync again to guarantee all things done.
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"$LCTL set_param -n osd*.*MDT*.force_sync=1"
+
+	for n in $(seq $MDSCOUNT); do
+		echo "stop mds$n"
+		stop mds$n > /dev/null || error "Fail to stop MDS$n!"
+	done
+
+	[ ! -z $inject ] && [ $(facet_fstype $SINGLEMDS) = "ldiskfs" ] && {
+		if [ $inject -eq 1 ]; then
+			for n in $(seq $MDSCOUNT); do
+				mds_backup_restore mds$n ||
+					error "Backup/restore on mds$n failed"
+			done
+		elif [ $inject -eq 2 ]; then
+			scrub_remove_ois 1
+		fi
+	}
 }
 
-test_0() {
-	scrub_prep 0
-	echo "start $SINGLEMDS without disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
-		error "(1) Fail to start MDS!"
+scrub_start_mds() {
+	local error_id=$1
+	local opts=$2
+	local n
 
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(2) Expect 'init', but got '$STATUS'"
+	for n in $(seq $MDSCOUNT); do
+		start mds$n $(mdsdevname $n) $opts >/dev/null ||
+			error "($error_id) Failed to start mds$n"
+	done
+}
 
-	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ -z "$FLAGS" ] || error "(3) Expect empty flags, but got '$FLAGS'"
+scrub_stop_mds() {
+	local error_id=$1
+	local n
 
-	mount_client $MOUNT || error "(4) Fail to start client!"
+	for n in $(seq $MDSCOUNT); do
+		echo "stopping mds$n"
+		stop mds$n >/dev/null ||
+			error "($error_id) Failed to stop mds$n"
+	done
+}
+
+scrub_check_status() {
+	local error_id=$1
+	local expected=$2
+	local n
+
+	for n in $(seq $MDSCOUNT); do
+		wait_update_facet mds$n "$LCTL get_param -n \
+			osd-*.$(facet_svc mds$n).oi_scrub |
+			awk '/^status/ { print \\\$2 }'" "$expected" 6 ||
+			error "($error_id) Expected '$expected' on mds$n"
+	done
+}
+
+scrub_check_flags() {
+	local error_id=$1
+	local expected=$2
+	local actual
+	local n
+
+	for n in $(seq $MDSCOUNT); do
+		actual=$(do_facet mds$n $LCTL get_param -n \
+			osd-*.$(facet_svc mds$n).oi_scrub |
+			awk '/^flags/ { print $2 }')
+		if [ "$actual" != "$expected" ]; then
+			error "($error_id) Expected '$expected' on mds$n, but" \
+			       "got '$actual'"
+		fi
+	done
+}
+
+scrub_check_params() {
+	local error_id=$1
+	local expected=$2
+	local actual
+	local n
+
+	for n in $(seq $MDSCOUNT); do
+		actual=$(do_facet mds$n $LCTL get_param -n \
+			osd-*.$(facet_svc mds$n).oi_scrub |
+			awk '/^param/ { print $2 }')
+		if [ "$actual" != "$expected" ]; then
+			error "($error_id) Expected '$expected' on mds$n, but" \
+			       "got '$actual'"
+		fi
+	done
+}
 
-	diff -q $LUSTRE/tests/test-framework.sh $DIR/$tdir/test-framework.sh ||
-		error "(5) File diff failed unexpected!"
+scrub_check_repaired() {
+	local error_id=$1
+	local expected=$2
+	local dryrun=$3
+	local actual
+	local n
+
+	for n in $(seq $MDSCOUNT); do
+		if [ $dryrun -eq 1 ]; then
+			actual=$(do_facet mds$n $LCTL get_param -n \
+				osd-*.$(facet_svc mds$n).oi_scrub |
+				awk '/^inconsistent:/ { print $2 }')
+		else
+			actual=$(do_facet mds$n $LCTL get_param -n \
+				osd-*.$(facet_svc mds$n).oi_scrub |
+				awk '/^updated:/ { print $2 }')
+		fi
+
+		if [ $expected -eq 0 -a $actual -ne 0 ]; then
+			error "($error_id) Expected no repaired on mds$n, but" \
+			       "got '$actual'"
+		fi
+
+		if [ $expected -ne 0 -a $actual -lt $expected ]; then
+			error "($error_id) Expected '$expected' on mds$n, but" \
+			       "got '$actual'"
+		fi
+	done
+}
+
+scrub_check_data() {
+	local error_id=$1
+	local n
+
+	for n in $(seq $MDSCOUNT); do
+		diff -q $LUSTRE/tests/test-framework.sh \
+			$DIR/$tdir/mds$n/test-framework.sh ||
+			error "($error_id) File data check failed"
+	done
+}
+
+scrub_check_data2() {
+	local filename=$1
+	local error_id=$2
+	local n
+
+	for n in $(seq $MDSCOUNT); do
+		diff -q $LUSTRE/tests/$filename \
+			$DIR/$tdir/mds$n/$filename ||
+			error "($error_id) File data check failed"
+	done
+}
+
+scrub_remove_ois() {
+	[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] && return
+
+	local error_id=$1
+	local index=$2
+	local n
+
+	for n in $(seq $MDSCOUNT); do
+		mds_remove_ois mds$n $index ||
+			error "($error_id) Failed to remove OI .$index on mds$n"
+	done
+}
+
+scrub_enable_auto() {
+	do_nodes $(comma_list $(mdts_nodes)) $LCTL set_param -n \
+		osd-*.*.auto_scrub=1
+}
+
+full_scrub_ratio() {
+	[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] && return
+
+	local ratio=$1
+
+	do_nodes $(comma_list $(mdts_nodes)) $LCTL set_param -n \
+		osd-*.*.full_scrub_ratio=$ratio
+}
+
+full_scrub_threshold_rate() {
+	[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] && return
+
+	local rate=$1
+
+	do_nodes $(comma_list $(mdts_nodes)) $LCTL set_param -n \
+		osd-*.*.full_scrub_threshold_rate=$rate
+}
+
+scrub_enable_index_backup() {
+	do_nodes $(comma_list $(all_server_nodes)) $LCTL set_param -n \
+		osd-*.*.index_backup=1
+}
+
+scrub_disable_index_backup() {
+	do_nodes $(comma_list $(all_server_nodes)) $LCTL set_param -n \
+		osd-*.*.index_backup=0
+}
+
+test_0() {
+	scrub_prep 0
+	echo "starting MDTs without disabling OI scrub"
+	scrub_start_mds 1 "$MOUNT_OPTS_SCRUB"
+	scrub_check_status 2 init
+	scrub_check_flags 3 ""
+	mount_client $MOUNT || error "(4) Fail to start client!"
+	scrub_check_data 5
 }
 run_test 0 "Do not auto trigger OI scrub for non-backup/restore case"
 
 test_1a() {
+	[ -n "$FILESET" ] && skip "Not functional for FILESET set"
+
 	scrub_prep 0
 	echo "start $SINGLEMDS without disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
-		error "(1) Fail to start MDS!"
-
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(2) Expect 'init', but got '$STATUS'"
+	scrub_start_mds 1 "$MOUNT_OPTS_SCRUB"
 
 	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
 	[ -z "$FLAGS" ] || error "(3) Expect empty flags, but got '$FLAGS'"
 
 	mount_client $MOUNT || error "(4) Fail to start client!"
-
 	#define OBD_FAIL_OSD_FID_MAPPING			0x193
 	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x193
 	# update .lustre OI mapping
 	touch $MOUNT/.lustre
 	do_facet $SINGLEMDS $LCTL set_param fail_loc=0
-
 	umount_client $MOUNT || error "(5) Fail to stop client!"
 
 	echo "stop $SINGLEMDS"
 	stop $SINGLEMDS > /dev/null || error "(6) Fail to stop MDS!"
 
 	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
+	start $SINGLEMDS $(mdsdevname 1) $MOUNT_OPTS_NOSCRUB > /dev/null ||
 		error "(7) Fail to start MDS!"
 
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(8) Expect 'init', but got '$STATUS'"
-
 	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
 	[ "$FLAGS" == "inconsistent" ] ||
 		error "(9) Expect 'inconsistent', but got '$FLAGS'"
@@ -134,449 +384,539 @@ test_1a() {
 run_test 1a "Auto trigger initial OI scrub when server mounts"
 
 test_1b() {
-	scrub_prep 0
-	mds_remove_ois || error "(1) Fail to remove/recreate!"
-
-	echo "start $SINGLEMDS without disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
-
-	sleep 3
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(3) Expect 'completed', but got '$STATUS'"
-
+	scrub_prep 0 2
+	echo "start MDTs without disabling OI scrub"
+	scrub_start_mds 2 "$MOUNT_OPTS_SCRUB"
+	[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] ||
+		scrub_check_status 3 completed
 	mount_client $MOUNT || error "(4) Fail to start client!"
-
-	diff -q $LUSTRE/tests/test-framework.sh $DIR/$tdir/test-framework.sh ||
-		error "(5) File diff failed unexpected!"
+	scrub_check_data2 runas 5
+	scrub_check_status 6 completed
 }
 run_test 1b "Trigger OI scrub when MDT mounts for OI files remove/recreate case"
 
 test_1c() {
+	[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] &&
+		skip "ldiskfs special test" && return
+
 	local index
 
 	# OI files to be removed:
 	# idx 0: oi.16.0
-	# idx 1: oi.16.1
 	# idx 2: oi.16.{2,4,8,16,32}
 	# idx 3: oi.16.{3,9,27}
-	# idx 5: oi.16.{5,25}
-	# idx 7: oi.16.{7,49}
-	for index in 0 1 2 3 5 7; do
+	for index in 0 2 3; do
 		scrub_prep 0
-		mds_remove_ois ${index} || error "(1) Fail to remove/recreate!"
+		scrub_remove_ois 1 $index
+		echo "start MDTs with OI scrub disabled"
+		scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
+		scrub_check_flags 3 recreated
+		scrub_start 4
+		scrub_check_status 5 completed
+		scrub_check_flags 6 ""
+	done
+}
+run_test 1c "Auto detect kinds of OI file(s) removed/recreated cases"
 
-		echo "start $SINGLEMDS with disabling OI scrub"
-		start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > \
-			/dev/null || error "(2) Fail to start MDS!"
+test_2() {
+	[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] &&
+		skip "ldiskfs special test" && return
 
-		local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-		[ "$FLAGS" == "recreated" ] ||
-			error "(3) Expect 'recreated', but got '$FLAGS'"
+	scrub_prep 0 1
+	echo "starting MDTs without disabling OI scrub"
+	scrub_start_mds 2 "$MOUNT_OPTS_SCRUB"
+	scrub_check_status 3 completed
+	mount_client $MOUNT || error "(4) Fail to start client!"
+	scrub_check_data 5
+}
+run_test 2 "Trigger OI scrub when MDT mounts for backup/restore case"
 
-		$START_SCRUB || error "(4) Fail to start OI scrub!"
-		sleep 3
-		local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-		[ "$STATUS" == "completed" ] ||
-			error "(5) Expect 'completed', but got '$STATUS'"
+# test_3 is obsolete, it will be covered by test_5.
+test_3() {
+	formatall > /dev/null
+	setupall > /dev/null
 
-		FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-		[ -z "$FLAGS" ] ||
-			error "(6) Expect empty flags, but got '$FLAGS'"
+	scrub_prep 0 1
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
+	scrub_check_status 3 init
+	[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] ||
+		scrub_check_flags 4 recreated,inconsistent
+}
+#run_test 3 "Do not trigger OI scrub when MDT mounts if 'noscrub' specified"
+
+test_4a() {
+	scrub_prep 0 1
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
+	[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] ||
+		scrub_check_flags 4 recreated,inconsistent
+	mount_client $MOUNT || error "(5) Fail to start client!"
+	scrub_enable_auto
+	full_scrub_ratio 0
+	scrub_check_data 6
+	sleep 3
+
+	scrub_check_status 7 completed
+	scrub_check_flags 8 ""
+
+	local -a updated0
+	for n in $(seq $MDSCOUNT); do
+		updated0[$n]=$(scrub_status $n |
+			       awk '/^prior_updated/ { print $2 }')
+	done
+
+	scrub_check_data2 sanity-scrub.sh 9
+	sleep 3
+
+	local -a updated1
+	for n in $(seq $MDSCOUNT); do
+		updated1[$n]=$(scrub_status $n |
+			       awk '/^prior_updated/ { print $2 }')
+		[ ${updated0[$n]} -eq ${updated1[$n]} ] ||
+			error "(10) NOT auto trigger full scrub as expected"
 	done
 }
-run_test 1c "Auto detect kinds of OI file(s) removed/recreated cases"
+run_test 4a "Auto trigger OI scrub if bad OI mapping was found (1)"
 
-test_2() {
-	scrub_prep 0
-	mds_backup_restore || error "(1) Fail to backup/restore!"
+test_4b() {
+	[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] &&
+		skip "ldiskfs special test" && return
 
-	echo "start $SINGLEMDS without disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
+	scrub_prep 5 1
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
+	scrub_check_flags 4 recreated,inconsistent
+	mount_client $MOUNT || error "(5) Fail to start client!"
+	scrub_enable_auto
+	full_scrub_ratio 10
+	full_scrub_threshold_rate 10000
+	scrub_check_data 6
+	sleep 3
 
+	scrub_check_status 7 completed
+	scrub_check_flags 8 ""
+
+	local -a updated0
+	for n in $(seq $MDSCOUNT); do
+		updated0[$n]=$(scrub_status $n |
+			       awk '/^prior_updated/ { print $2 }')
+
+		echo "OI scrub on MDS$n status for the 1st time:"
+		do_facet mds$n $LCTL get_param -n \
+			osd-*.$(facet_svc mds$n).oi_scrub
+	done
+
+	scrub_check_data2 sanity-scrub.sh 9
 	sleep 3
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(3) Expect 'completed', but got '$STATUS'"
 
-	mount_client $MOUNT || error "(4) Fail to start client!"
+	scrub_check_status 10 completed
+	scrub_check_flags 11 ""
 
-	diff -q $LUSTRE/tests/test-framework.sh $DIR/$tdir/test-framework.sh ||
-		error "(5) File diff failed unexpected!"
-}
-run_test 2 "Trigger OI scrub when MDT mounts for backup/restore case"
+	local -a updated1
+	for n in $(seq $MDSCOUNT); do
+		updated1[$n]=$(scrub_status $n |
+			       awk '/^prior_updated/ { print $2 }')
 
-test_3() {
-	scrub_prep 0
-	mds_backup_restore || error "(1) Fail to backup/restore!"
+		echo "OI scrub on MDS$n status for the 2nd time:"
+		do_facet mds$n $LCTL get_param -n \
+			osd-*.$(facet_svc mds$n).oi_scrub
 
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
+		[ ${updated0[$n]} -lt ${updated1[$n]} ] ||
+			error "(12) Auto trigger full scrub unexpectedly"
+	done
 
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(3) Expect 'init', but got '$STATUS'"
+	for n in $(seq $MDSCOUNT); do
+		ls -l $DIR/$tdir/mds$n/*.sh > /dev/null ||
+			error "(13) fail to ls"
+	done
+	sleep 3
 
-	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ "$FLAGS" == "inconsistent" ] ||
-		error "(4) Expect 'inconsistent', but got '$FLAGS'"
-	echo "stopall"
-	stopall > /dev/null
-}
-run_test 3 "Do not trigger OI scrub when MDT mounts if 'noscrub' specified"
+	scrub_check_status 14 completed
+	scrub_check_flags 15 ""
 
-test_4() {
-	scrub_prep 0
-	mds_backup_restore || error "(1) Fail to backup/restore!"
+	for n in $(seq $MDSCOUNT); do
+		updated0[$n]=$(scrub_status $n |
+			       awk '/^prior_updated/ { print $2 }')
 
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
+		echo "OI scrub on MDS$n status for the 3rd time:"
+		do_facet mds$n $LCTL get_param -n \
+			osd-*.$(facet_svc mds$n).oi_scrub
 
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(3) Expect 'init', but got '$STATUS'"
+		[ ${updated0[$n]} -gt ${updated1[$n]} ] ||
+			error "(16) Auto trigger full scrub unexpectedly"
+	done
 
-	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ "$FLAGS" == "inconsistent" ] ||
-		error "(4) Expect 'inconsistent', but got '$FLAGS'"
+	for n in $(seq $MDSCOUNT); do
+		ls -l $DIR/$tdir/mds$n/d_${tfile}/ || error "(17) fail to ls"
+	done
+	sleep 3
 
+	for n in $(seq $MDSCOUNT); do
+		updated1[$n]=$(scrub_status $n |
+			       awk '/^prior_updated/ { print $2 }')
+		[ ${updated0[$n]} -eq ${updated1[$n]} ] || {
+			echo "OI scrub on MDS$n status for the 4th time:"
+			do_facet mds$n $LCTL get_param -n \
+				osd-*.$(facet_svc mds$n).oi_scrub
+
+			error "(18) NOT auto trigger full scrub as expected"
+		}
+	done
+}
+run_test 4b "Auto trigger OI scrub if bad OI mapping was found (2)"
+
+test_4c() {
+	[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] &&
+		skip "ldiskfs special test" && return
+
+	scrub_prep 500 1
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
+	scrub_check_flags 4 recreated,inconsistent
 	mount_client $MOUNT || error "(5) Fail to start client!"
+	scrub_enable_auto
+	full_scrub_ratio 2
+	full_scrub_threshold_rate 20
+	scrub_check_data 6
+	sleep 3
 
-	do_facet $SINGLEMDS \
-		$LCTL set_param -n osd-ldiskfs.${MDT_DEV}.auto_scrub 1
-	diff -q $LUSTRE/tests/test-framework.sh $DIR/$tdir/test-framework.sh ||
-		error "(6) File diff failed unexpected!"
+	scrub_check_status 7 completed
+	scrub_check_flags 8 ""
 
+	local -a updated0
+	for n in $(seq $MDSCOUNT); do
+		updated0[$n]=$(scrub_status $n |
+			       awk '/^prior_updated/ { print $2 }')
+
+		echo "OI scrub on MDS$n status for the 1st time:"
+		do_facet mds$n $LCTL get_param -n \
+			osd-*.$(facet_svc mds$n).oi_scrub
+	done
+
+	scrub_check_data2 sanity-scrub.sh 9
+	sleep 3
+
+	scrub_check_status 10 completed
+	scrub_check_flags 11 ""
+
+	local -a updated1
+	for n in $(seq $MDSCOUNT); do
+		updated1[$n]=$(scrub_status $n |
+			       awk '/^prior_updated/ { print $2 }')
+
+		echo "OI scrub on MDS$n status for the 2nd time:"
+		do_facet mds$n $LCTL get_param -n \
+			osd-*.$(facet_svc mds$n).oi_scrub
+
+		[ ${updated0[$n]} -lt ${updated1[$n]} ] ||
+			error "(12) Auto trigger full scrub unexpectedly"
+	done
+
+	for n in $(seq $MDSCOUNT); do
+		ls -l $DIR/$tdir/mds$n/*.sh > /dev/null ||
+			error "(13) fail to ls"
+	done
+	sleep 3
+
+	scrub_check_status 14 completed
+	scrub_check_flags 15 ""
+
+	for n in $(seq $MDSCOUNT); do
+		updated0[$n]=$(scrub_status $n |
+			       awk '/^prior_updated/ { print $2 }')
+
+		echo "OI scrub on MDS$n status for the 3rd time:"
+		do_facet mds$n $LCTL get_param -n \
+			osd-*.$(facet_svc mds$n).oi_scrub
+
+		[ ${updated0[$n]} -gt ${updated1[$n]} ] ||
+			error "(16) Auto trigger full scrub unexpectedly"
+	done
+
+	for n in $(seq $MDSCOUNT); do
+		ls -l $DIR/$tdir/mds$n/${tfile}1 || error "(17) fail to ls"
+	done
 	sleep 3
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(7) Expect 'completed', but got '$STATUS'"
+
+	for n in $(seq $MDSCOUNT); do
+		updated1[$n]=$(scrub_status $n |
+			       awk '/^prior_updated/ { print $2 }')
+		[ ${updated0[$n]} -eq ${updated1[$n]} ] || {
+			echo "OI scrub on MDS$n status for the 4th time:"
+			do_facet mds$n $LCTL get_param -n \
+				osd-*.$(facet_svc mds$n).oi_scrub
+
+			error "(18) NOT auto trigger full scrub as expected"
+		}
+	done
 }
-run_test 4 "Trigger OI scrub automatically if inconsistent OI mapping was found"
+run_test 4c "Auto trigger OI scrub if bad OI mapping was found (3)"
 
-test_5() {
-	scrub_prep 1500
-	mds_backup_restore || error "(1) Fail to backup/restore!"
+test_4d() {
+	[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] && skip "ldiskfs only test"
 
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
+	check_mount_and_prep
 
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(3) Expect 'init', but got '$STATUS'"
+	#define OBD_FAIL_OSD_DUPLICATE_MAP	0x19b
+	do_nodes $(comma_list $(osts_nodes)) $LCTL set_param fail_loc=0x19b
+	for i in {1..100}; do
+		echo $i > $DIR/$tdir/f_$i || error "write f_$i failed"
+	done
+	do_nodes $(comma_list $(osts_nodes)) $LCTL set_param fail_loc=0
 
-	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ "$FLAGS" == "inconsistent" ] ||
-		error "(4) Expect 'inconsistent', but got '$FLAGS'"
+	for i in {101..200}; do
+		echo $i > $DIR/$tdir/f_$i || error "write f_$i failed"
+	done
+
+	for i in {1..200}; do
+		echo $i | cmp $DIR/$tdir/f_$i - || error "f_$i data corrupt"
+	done
+}
+run_test 4d "FID in LMA mismatch with object FID won't block create"
+
+test_5() {
+	formatall > /dev/null
+	setupall > /dev/null
 
+	scrub_prep 100 1
+	echo "starting MDTs with OI scrub disabled (1)"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
+	scrub_check_status 3 init
+	[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] ||
+		scrub_check_flags 4 recreated,inconsistent
 	mount_client $MOUNT || error "(5) Fail to start client!"
+	scrub_enable_auto
+	full_scrub_ratio 0
 
-	do_facet $SINGLEMDS \
-		$LCTL set_param -n osd-ldiskfs.${MDT_DEV}.auto_scrub 1
 	#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
-	do_facet $SINGLEMDS $LCTL set_param fail_val=3
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x190
-	diff -q $LUSTRE/tests/test-framework.sh $DIR/$tdir/test-framework.sh ||
-		error "(6) File diff failed unexpected!"
+	do_nodes $(comma_list $(mdts_nodes)) \
+		$LCTL set_param fail_val=3 fail_loc=0x190
 
+	scrub_check_data 6
 	umount_client $MOUNT || error "(7) Fail to stop client!"
-
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(8) Expect 'scanning', but got '$STATUS'"
+	scrub_check_status 8 scanning
 
 	#define OBD_FAIL_OSD_SCRUB_CRASH	 0x191
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x80000191
-	sleep 4
-	echo "stop $SINGLEMDS"
-	stop $SINGLEMDS > /dev/null || error "(9) Fail to stop MDS!"
+	do_nodes $(comma_list $(mdts_nodes)) $LCTL set_param fail_loc=0x191
 
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(10) Fail to start MDS!"
+	sleep 4
+	scrub_stop_mds 9
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "crashed" ] ||
-		error "(11) Expect 'crashed', but got '$STATUS'"
+	do_nodes $(comma_list $(mdts_nodes)) \
+		$LCTL set_param fail_loc=0 fail_val=0
 
-	echo "stop $SINGLEMDS"
-	stop $SINGLEMDS > /dev/null || error "(12) Fail to stop MDS!"
+	echo "starting MDTs with OI scrub disabled (2)"
+	scrub_start_mds 10 "$MOUNT_OPTS_NOSCRUB"
+	scrub_check_status 11 crashed
+	scrub_stop_mds 12
 
 	#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
-	do_facet $SINGLEMDS $LCTL set_param fail_val=3
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x190
-	echo "start $SINGLEMDS without disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
-		error "(13) Fail to start MDS!"
+	do_nodes $(comma_list $(mdts_nodes)) \
+		$LCTL set_param fail_val=3 fail_loc=0x190
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(14) Expect 'scanning', but got '$STATUS'"
+	echo "starting MDTs without disabling OI scrub"
+	scrub_start_mds 13 "$MOUNT_OPTS_SCRUB"
+	scrub_check_status 14 scanning
 
 	#define OBD_FAIL_OSD_SCRUB_FATAL	 0x192
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x80000192
-	sleep 4
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "failed" ] ||
-		error "(15) Expect 'failed', but got '$STATUS'"
+	do_nodes $(comma_list $(mdts_nodes)) $LCTL set_param fail_loc=0x192
 
+	scrub_check_status 15 failed
 	mount_client $MOUNT || error "(16) Fail to start client!"
 
-	#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
-	do_facet $SINGLEMDS $LCTL set_param fail_val=3
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x190
-	stat $DIR/$tdir/${tfile}1000 ||
-		error "(17) Fail to stat $DIR/$tdir/${tfile}1000!"
+	full_scrub_ratio 0
+	do_nodes $(comma_list $(mdts_nodes)) \
+		$LCTL set_param fail_loc=0 fail_val=0
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(18) Expect 'scanning', but got '$STATUS'"
+	local n
+	declare -a pids
 
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0
-	do_facet $SINGLEMDS $LCTL set_param fail_val=0
-	sleep 5
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(19) Expect 'completed', but got '$STATUS'"
+	for n in $(seq $MDSCOUNT); do
+		stat $DIR/$tdir/mds$n/sanity-scrub.sh &
+		pids[$n]=$!
+	done
 
-	FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ -z "$FLAGS" ] || error "(20) Expect empty flags, but got '$FLAGS'"
+	for n in $(seq $MDSCOUNT); do
+		wait ${pids[$n]} ||
+			error "(18) Fail to stat mds$n/sanity-scrub.sh"
+	done
+
+	scrub_check_status 19 completed
+	scrub_check_flags 20 ""
 }
 run_test 5 "OI scrub state machine"
 
 test_6() {
-	scrub_prep 1000
-	mds_backup_restore || error "(1) Fail to backup/restore!"
-
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
-
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(3) Expect 'init', but got '$STATUS'"
-
-	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ "$FLAGS" == "inconsistent" ] ||
-		error "(4) Expect 'inconsistent', but got '$FLAGS'"
-
+	scrub_prep 100 1
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
+	[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] ||
+		scrub_check_flags 4 recreated,inconsistent
 	mount_client $MOUNT || error "(5) Fail to start client!"
+	scrub_enable_auto
+	full_scrub_ratio 0
 
-	do_facet $SINGLEMDS \
-		$LCTL set_param -n osd-ldiskfs.${MDT_DEV}.auto_scrub 1
 	#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
-	do_facet $SINGLEMDS $LCTL set_param fail_val=3
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x190
-	diff -q $LUSTRE/tests/test-framework.sh $DIR/$tdir/test-framework.sh ||
-		error "(6) File diff failed unexpected!"
+	do_nodes $(comma_list $(mdts_nodes)) \
+		$LCTL set_param fail_val=2 fail_loc=0x190
+
+	scrub_check_data 6
 
 	# Sleep 5 sec to guarantee at least one object processed by OI scrub
 	sleep 5
 	# Fail the OI scrub to guarantee there is at least one checkpoint
 	#define OBD_FAIL_OSD_SCRUB_FATAL	 0x192
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x80000192
-	sleep 4
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "failed" ] ||
-		error "(7) Expect 'failed', but got '$STATUS'"
+	do_nodes $(comma_list $(mdts_nodes)) $LCTL set_param fail_loc=0x192
+
+	scrub_check_status 7 failed
 
 	#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
-	do_facet $SINGLEMDS $LCTL set_param fail_val=3
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x190
-	# stat will re-trigger OI scrub
-	stat $DIR/$tdir/${tfile}800 ||
-		error "(8) Fail to stat $DIR/$tdir/${tfile}800!"
+	do_nodes $(comma_list $(mdts_nodes)) \
+		$LCTL set_param fail_val=3 fail_loc=0x190
+
+	local n
+	for n in $(seq $MDSCOUNT); do
+		# stat will re-trigger OI scrub
+		stat $DIR/$tdir/mds$n/sanity-scrub.sh ||
+			error "(8) Failed to stat mds$n/sanity-scrub.sh"
+	done
 
 	umount_client $MOUNT || error "(9) Fail to stop client!"
-
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(10) Expect 'scanning', but got '$STATUS'"
+	scrub_check_status 10 scanning
 
 	#define OBD_FAIL_OSD_SCRUB_CRASH	 0x191
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x80000191
+	do_nodes $(comma_list $(mdts_nodes)) $LCTL set_param fail_loc=0x191
+
 	sleep 4
-	local POSITION0=$($SHOW_SCRUB |
+	local -a position0
+	for n in $(seq $MDSCOUNT); do
+		position0[$n]=$(scrub_status $n |
 			awk '/^last_checkpoint_position/ {print $2}')
-	POSITION0=$((POSITION0 + 1))
+		position0[$n]=$((${position0[$n]} + 1))
+	done
 
-	echo "stop $SINGLEMDS"
-	stop $SINGLEMDS > /dev/null || error "(11) Fail to stop MDS!"
+	scrub_stop_mds 11
 
 	#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
-	do_facet $SINGLEMDS $LCTL set_param fail_val=3
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x190
-	echo "start $SINGLEMDS without disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
-		error "(12) Fail to start MDS!"
+	do_nodes $(comma_list $(mdts_nodes)) \
+		$LCTL set_param fail_val=3 fail_loc=0x190
+
+	echo "starting MDTs without disabling OI scrub"
+	scrub_start_mds 12 "$MOUNT_OPTS_SCRUB"
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(13) Expect 'scanning', but got '$STATUS'"
+	scrub_check_status 13 scanning
 
-	local POSITION1=$($SHOW_SCRUB |
+	local -a position1
+	for n in $(seq $MDSCOUNT); do
+		position1[$n]=$(scrub_status $n |
 			awk '/^latest_start_position/ {print $2}')
-	[ $POSITION0 -eq $POSITION1 ] ||
-		error "(14) Expect position: $POSITION0, but got $POSITION1"
+		if [ ${position0[$n]} -ne ${position1[$n]} ]; then
+			error "(14) Expected position ${position0[$n]}, but" \
+				"got ${position1[$n]}"
+		fi
+	done
 
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0
-	do_facet $SINGLEMDS $LCTL set_param fail_val=0
-	sleep 5
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(15) Expect 'completed', but got '$STATUS'"
+	do_nodes $(comma_list $(mdts_nodes)) \
+		$LCTL set_param fail_loc=0 fail_val=0
 
-	FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ -z "$FLAGS" ] || error "(16) Expect empty flags, but got '$FLAGS'"
+	scrub_check_status 15 completed
+	scrub_check_flags 16 ""
 }
 run_test 6 "OI scrub resumes from last checkpoint"
 
 test_7() {
-	scrub_prep 500
-	mds_backup_restore || error "(1) Fail to backup/restore!"
-
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
-
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(3) Expect 'init', but got '$STATUS'"
-
-	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ "$FLAGS" == "inconsistent" ] ||
-		error "(4) Expect 'inconsistent', but got '$FLAGS'"
-
+	scrub_prep 500 1
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
+	[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] ||
+		scrub_check_flags 4 recreated,inconsistent
 	mount_client $MOUNT || error "(5) Fail to start client!"
+	scrub_enable_auto
+	full_scrub_ratio 0
 
-	do_facet $SINGLEMDS \
-		$LCTL set_param -n osd-ldiskfs.${MDT_DEV}.auto_scrub 1
 	#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
-	do_facet $SINGLEMDS $LCTL set_param fail_val=3
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x190
-	diff -q $LUSTRE/tests/test-framework.sh $DIR/$tdir/test-framework.sh ||
-		error "(6) File diff failed unexpected!"
+	do_nodes $(comma_list $(mdts_nodes)) \
+		$LCTL set_param fail_val=3 fail_loc=0x190
 
-	stat $DIR/$tdir/${tfile}300 ||
-		error "(7) Fail to stat $DIR/$tdir/${tfile}300!"
+	scrub_check_data 6
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(8) Expect 'scanning', but got '$STATUS'"
+	local n
+	for n in $(seq $MDSCOUNT); do
+		stat $DIR/$tdir/mds$n/${tfile}300 ||
+			error "(7) Failed to stat mds$n/${tfile}300!"
+	done
 
-	FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ "$FLAGS" == "inconsistent,auto" ] ||
-		error "(9) Expect 'inconsistent,auto', but got '$FLAGS'"
+	scrub_check_status 8 scanning
+	if [ $(facet_fstype $SINGLEMDS) != "ldiskfs" ]; then
+		scrub_check_flags 9 inconsistent,auto
+	else
+		scrub_check_flags 9 recreated,inconsistent,auto
+	fi
 
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0
-	do_facet $SINGLEMDS $LCTL set_param fail_val=0
-	sleep 5
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(10) Expect 'completed', but got '$STATUS'"
+	do_nodes $(comma_list $(mdts_nodes)) \
+		$LCTL set_param fail_loc=0 fail_val=0
 
-	FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ -z "$FLAGS" ] || error "(11) Expect empty flags, but got '$FLAGS'"
+	scrub_check_status 10 completed
+	scrub_check_flags ""
 }
 run_test 7 "System is available during OI scrub scanning"
 
 test_8() {
-	scrub_prep 128
-	mds_backup_restore || error "(1) Fail to backup/restore!"
-
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
-
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(3) Expect 'init', but got '$STATUS'"
-
-	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ "$FLAGS" == "inconsistent" ] ||
-		error "(4) Expect 'inconsistent', but got '$FLAGS'"
+	scrub_prep 128 1
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
+	[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] ||
+		scrub_check_flags 4 recreated,inconsistent
 
 	#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
-	do_facet $SINGLEMDS $LCTL set_param fail_val=1
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x190
-	$START_SCRUB || error "(5) Fail to start OI scrub!"
-
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(6) Expect 'scanning', but got '$STATUS'"
+	do_nodes $(comma_list $(mdts_nodes)) \
+		$LCTL set_param fail_val=1 fail_loc=0x190
 
-	$STOP_SCRUB || error "(7) Fail to stop OI scrub!"
+	scrub_start 5
+	scrub_check_status 6 scanning
+	scrub_stop 7
+	scrub_check_status 8 stopped
+	scrub_start 9
+	scrub_check_status 10 scanning
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "stopped" ] ||
-		error "(8) Expect 'stopped', but got '$STATUS'"
-
-	$START_SCRUB || error "(9) Fail to start OI scrub!"
-
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(10) Expect 'scanning', but got '$STATUS'"
-
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0
-	do_facet $SINGLEMDS $LCTL set_param fail_val=0
-	sleep 5
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(11) Expect 'completed', but got '$STATUS'"
+	do_nodes $(comma_list $(mdts_nodes)) \
+		$LCTL set_param fail_loc=0 fail_val=0
 
-	FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ -z "$FLAGS" ] || error "(12) Expect empty flags, but got '$FLAGS'"
+	scrub_check_status 11 completed
+	scrub_check_flags 12 ""
 }
 run_test 8 "Control OI scrub manually"
 
 test_9() {
+	# Skip scrub speed test for ZFS because of performance unstable
+	[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] &&
+		skip "test scrub speed only on ldiskfs" && return
+
 	if [ -z "$(grep "processor.*: 1" /proc/cpuinfo)" ]; then
 		skip "Testing on UP system, the speed may be inaccurate."
 		return 0
 	fi
 
-	scrub_prep 8000
-	mds_backup_restore || error "(1) Fail to backup/restore!"
-
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
-
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(3) Expect 'init', but got '$STATUS'"
+	scrub_prep 6000 1
 
-	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ "$FLAGS" == "inconsistent" ] ||
-		error "(4) Expect 'inconsistent', but got '$FLAGS'"
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
+	scrub_check_flags 4 recreated,inconsistent
 
 	local BASE_SPEED1=100
 	local RUN_TIME1=10
 	# OI scrub should run with full speed under inconsistent case
-	$START_SCRUB -s $BASE_SPEED1 || error "(5) Fail to start OI scrub!"
+	scrub_start 5 -s $BASE_SPEED1
 
 	sleep $RUN_TIME1
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(6) Expect 'completed', but got '$STATUS'"
-
-	FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ -z "$FLAGS" ] || error "(7) Expect empty flags, but got '$FLAGS'"
-
+	scrub_check_status 6 completed
+	scrub_check_flags 7 ""
 	# OI scrub should run with limited speed under non-inconsistent case
-	$START_SCRUB -s $BASE_SPEED1 -r || error "(8) Fail to start OI scrub!"
+	scrub_start 8 -s $BASE_SPEED1 -r
 
 	sleep $RUN_TIME1
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(9) Expect 'scanning', but got '$STATUS'"
-
-	local SPEED=$($SHOW_SCRUB | awk '/^average_speed/ { print $2 }')
+	scrub_check_status 9 scanning
 
 	# Do NOT ignore that there are 1024 pre-fetched items. And there
 	# may be time error, normally it should be less than 2 seconds.
@@ -585,265 +925,362 @@ test_9() {
 	local TIME_DIFF=2
 	# MAX_MARGIN = 1.2 = 12 / 10
 	local MAX_SPEED=$(((PRE_FETCHED + BASE_SPEED1 * \
-			    (RUN_TIME1 + TIME_DIFF)) / RUN_TIME1 * 12 / 10))
-	[ $SPEED -lt $MAX_SPEED ] ||
-		error "(10) Got speed $SPEED, expected less than $MAX_SPEED"
+		(RUN_TIME1 + TIME_DIFF)) / RUN_TIME1 * 12 / 10))
+	local n
+	for n in $(seq $MDSCOUNT); do
+		local SPEED=$(scrub_status $n | \
+			awk '/^average_speed/ { print $2 }')
+		[ $SPEED -lt $MAX_SPEED ] ||
+			error "(10) Got speed $SPEED, expected less than" \
+				"$MAX_SPEED"
+	done
 
 	# adjust speed limit
 	local BASE_SPEED2=300
 	local RUN_TIME2=10
-	do_facet $SINGLEMDS \
-		$LCTL set_param -n mdd.${MDT_DEV}.lfsck_speed_limit $BASE_SPEED2
+	for n in $(seq $MDSCOUNT); do
+		do_facet mds$n $LCTL set_param -n \
+			mdd.$(facet_svc mds$n).lfsck_speed_limit $BASE_SPEED2
+	done
 	sleep $RUN_TIME2
 
-	SPEED=$($SHOW_SCRUB | awk '/^average_speed/ { print $2 }')
 	# MIN_MARGIN = 0.8 = 8 / 10
 	local MIN_SPEED=$(((PRE_FETCHED + \
 			    BASE_SPEED1 * (RUN_TIME1 - TIME_DIFF) + \
 			    BASE_SPEED2 * (RUN_TIME2 - TIME_DIFF)) / \
 			   (RUN_TIME1 + RUN_TIME2) * 8 / 10))
-	[ $SPEED -gt $MIN_SPEED ] ||
-		error "(11) Got speed $SPEED, expected more than $MIN_SPEED"
-
 	# MAX_MARGIN = 1.2 = 12 / 10
 	MAX_SPEED=$(((PRE_FETCHED + \
 		      BASE_SPEED1 * (RUN_TIME1 + TIME_DIFF) + \
 		      BASE_SPEED2 * (RUN_TIME2 + TIME_DIFF)) / \
 		     (RUN_TIME1 + RUN_TIME2) * 12 / 10))
-	[ $SPEED -lt $MAX_SPEED ] ||
-		error "(12) Got speed $SPEED, expected less than $MAX_SPEED"
+	for n in $(seq $MDSCOUNT); do
+		SPEED=$(scrub_status $n | awk '/^average_speed/ { print $2 }')
+		[ $SPEED -gt $MIN_SPEED ] ||
+			error "(11) Got speed $SPEED, expected more than" \
+				"$MIN_SPEED"
+		[ $SPEED -lt $MAX_SPEED ] ||
+			error "(12) Got speed $SPEED, expected less than" \
+				"$MAX_SPEED"
+
+		do_facet mds$n $LCTL set_param -n \
+				mdd.$(facet_svc mds$n).lfsck_speed_limit 0
+	done
 
-	do_facet $SINGLEMDS \
-		$LCTL set_param -n mdd.${MDT_DEV}.lfsck_speed_limit 0
-	sleep 6
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(13) Expect 'completed', but got '$STATUS'"
+	scrub_check_status 13 completed
 }
 run_test 9 "OI scrub speed control"
 
 test_10a() {
-	scrub_prep 0
-	mds_backup_restore || error "(1) Fail to backup/restore!"
-
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
+	scrub_prep 0 1
+	echo "starting mds$n with OI scrub disabled (1)"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
+	[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] ||
+		scrub_check_flags 4 recreated,inconsistent
+	mount_client $MOUNT || error "(5) Fail to start client!"
+	scrub_enable_auto
+	full_scrub_ratio 0
 
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(3) Expect 'init', but got '$STATUS'"
+	#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
+	do_nodes $(comma_list $(mdts_nodes)) \
+		$LCTL set_param fail_val=1 fail_loc=0x190
 
-	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ "$FLAGS" == "inconsistent" ] ||
-		error "(4) Expect 'inconsistent', but got '$FLAGS'"
+	scrub_check_data 6
+	scrub_check_status 7 scanning
+	umount_client $MOUNT || error "(8) Fail to stop client!"
+	scrub_stop_mds 9
+	echo "starting MDTs with OI scrub disabled (2)"
+	scrub_start_mds 10 "$MOUNT_OPTS_NOSCRUB"
+	scrub_check_status 11 paused
+	scrub_stop_mds 12
+	echo "starting MDTs without disabling OI scrub"
+	scrub_start_mds 13 "$MOUNT_OPTS_SCRUB"
+	scrub_check_status 14 scanning
+
+	do_nodes $(comma_list $(mdts_nodes)) \
+		$LCTL set_param fail_loc=0 fail_val=0
+
+	scrub_check_status 15 completed
+	scrub_check_flags 16 ""
+}
+run_test 10a "non-stopped OI scrub should auto restarts after MDS remount (1)"
 
-	mount_client $MOUNT || error "(5) Fail to start client!"
+# test_10b is obsolete, it will be coverded by related sanity-lfsck tests.
+test_10b() {
+	scrub_prep 0 1
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
+	[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] ||
+		scrub_check_flags 4 recreated,inconsistent
 
-	do_facet $SINGLEMDS \
-		$LCTL set_param -n osd-ldiskfs.${MDT_DEV}.auto_scrub 1
 	#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
-	do_facet $SINGLEMDS $LCTL set_param fail_val=1
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x190
-	diff -q $LUSTRE/tests/test-framework.sh $DIR/$tdir/test-framework.sh ||
-		error "(6) File diff failed unexpected!"
+	do_nodes $(comma_list $(mdts_nodes)) \
+		$LCTL set_param fail_val=3 fail_loc=0x190
+
+	scrub_start 5
+	scrub_check_status 6 scanning
+	scrub_stop_mds 7
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 8 "$MOUNT_OPTS_NOSCRUB"
+	scrub_check_status 9 paused
+	scrub_stop_mds 10
+	echo "starting MDTs without disabling OI scrub"
+	scrub_start_mds 11 "$MOUNT_OPTS_SCRUB"
+	scrub_check_status 12 scanning
+
+	do_nodes $(comma_list $(mdts_nodes)) \
+		$LCTL set_param fail_loc=0 fail_val=0
+
+	scrub_check_status 13 completed
+	scrub_check_flags 14 ""
+}
+#run_test 10b "non-stopped OI scrub should auto restarts after MDS remount (2)"
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(7) Expect 'scanning', but got '$STATUS'"
+test_11() {
+	[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] &&
+		skip "ldiskfs special test" && return
 
-	umount_client $MOUNT || error "(8) Fail to stop client!"
+	local CREATED=100
+	local n
 
-	echo "stop $SINGLEMDS"
-	stop $SINGLEMDS > /dev/null || error "(9) Fail to stop MDS!"
+	check_mount_and_prep
 
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(10) Fail to start MDS!"
+	for n in $(seq $MDSCOUNT); do
+		test_mkdir -i $((n - 1)) -c1 $DIR/$tdir/mds$n ||
+			error "(1) Fail to mkdir $DIR/$tdir/mds$n"
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "paused" ] ||
-		error "(11) Expect 'paused', but got '$STATUS'"
+		createmany -o $DIR/$tdir/mds$n/f $CREATED ||
+			error "(2) Fail to create under $tdir/mds$n"
+	done
 
-	echo "stop $SINGLEMDS"
-	stop $SINGLEMDS > /dev/null || error "(12) Fail to stop MDS!"
+	# reset OI scrub start point by force
+	scrub_start 3 -r
+	scrub_check_status 4 completed
 
-	echo "start $SINGLEMDS without disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
-		error "(13) Fail to start MDS!"
+	declare -a checked0
+	declare -a checked1
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(14) Expect 'scanning', but got '$STATUS'"
+	# OI scrub should skip the new created objects for the first accessing
+	# notice we're creating a new llog for every OST on every startup
+	# new features can make this even less stable, so we only check that
+	# the number of skipped files is more than the number or known created
+	local MINIMUM=$((CREATED + 1)) # files + directory
+	for n in $(seq $MDSCOUNT); do
+		local SKIPPED=$(scrub_status $n | awk '/^noscrub/ { print $2 }')
+		[ $SKIPPED -lt $MINIMUM ] &&
+			error "(5) Expect at least $MINIMUM objects" \
+				"skipped on mds$n, but got $SKIPPED"
 
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0
-	do_facet $SINGLEMDS $LCTL set_param fail_val=0
-	sleep 5
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(15) Expect 'completed', but got '$STATUS'"
+		checked0[$n]=$(scrub_status $n | awk '/^checked/ { print $2 }')
+	done
+
+	# reset OI scrub start point by force
+	scrub_start 6 -r
+	scrub_check_status 7 completed
 
-	FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ -z "$FLAGS" ] || error "(16) Expect empty flags, but got '$FLAGS'"
+	# OI scrub should skip the new created object only once
+	for n in $(seq $MDSCOUNT); do
+		SKIPPED=$(scrub_status $n | awk '/^noscrub/ { print $2 }')
+		checked1[$n]=$(scrub_status $n | awk '/^checked/ { print $2 }')
+
+		[ ${checked0[$n]} -ne ${checked1[$n]} -o $SKIPPED -eq 0 ] ||
+			error "(8) Expect 0 objects skipped on mds$n, but" \
+				"got $SKIPPED"
+	done
 }
-run_test 10a "non-stopped OI scrub should auto restarts after MDS remount (1)"
+run_test 11 "OI scrub skips the new created objects only once"
 
-# test_10b is obsolete, it will be coverded by related sanity-lfsck tests.
-test_10b() {
-	scrub_prep 0
-	mds_backup_restore || error "(1) Fail to backup/restore!"
+test_12() {
+	check_mount_and_prep
+	$LFS setstripe -c 1 -i 0 $DIR/$tdir
 
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
+	#define OBD_FAIL_OSD_COMPAT_INVALID_ENTRY		0x195
+	do_facet ost1 $LCTL set_param fail_loc=0x195
+	local count=$(precreated_ost_obj_count 0 0)
 
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(3) Expect 'init', but got '$STATUS'"
+	createmany -o $DIR/$tdir/f $((count + 32))
+	umount_client $MOUNT || error "(1) Fail to stop client!"
 
-	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ "$FLAGS" == "inconsistent" ] ||
-		error "(4) Expect 'inconsistent', but got '$FLAGS'"
+	stop ost1 || error "(2) Fail to stop ost1"
 
-	#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
-	do_facet $SINGLEMDS $LCTL set_param fail_val=3
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x190
+	#define OBD_FAIL_OST_NODESTROY		 0x233
+	do_facet ost1 $LCTL set_param fail_loc=0x233
 
-	$START_SCRUB || error "(5) Fail to start OI scrub!"
+	start ost1 $(ostdevname 1) $MOUNT_OPTS_NOSCRUB ||
+		error "(3) Fail to start ost1"
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(6) Expect 'scanning', but got '$STATUS'"
+	mount_client $MOUNT || error "(4) Fail to start client!"
 
-	echo "stop $SINGLEMDS"
-	stop $SINGLEMDS > /dev/null || error "(7) Fail to stop MDS!"
+	ls -ail $DIR/$tdir > /dev/null 2>&1 && error "(5) ls should fail"
 
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(8) Fail to start MDS!"
+	$START_SCRUB_ON_OST -r || error "(6) Fail to start OI scrub on OST!"
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "paused" ] ||
-		error "(9) Expect 'paused', but got '$STATUS'"
+	do_facet ost1 $LCTL set_param fail_loc=0
+	wait_update_facet ost1 "$LCTL get_param -n \
+		osd-*.$(facet_svc ost1).oi_scrub |
+		awk '/^status/ { print \\\$2 }'" "completed" 6 ||
+		error "(7) Expected '$expected' on ost1"
+
+	ls -ail $DIR/$tdir > /dev/null || {
+		$SHOW_SCRUB_ON_OST
+		error "(8) ls should succeed"
+	}
+}
+run_test 12 "OI scrub can rebuild invalid /O entries"
 
-	echo "stop $SINGLEMDS"
-	stop $SINGLEMDS > /dev/null || error "(10) Fail to stop MDS!"
+test_13() {
+	check_mount_and_prep
+	$LFS setstripe -c 1 -i 0 $DIR/$tdir
 
-	echo "start $SINGLEMDS without disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
-		error "(11) Fail to start MDS!"
+	#define OBD_FAIL_OSD_COMPAT_NO_ENTRY		0x196
+	do_facet ost1 $LCTL set_param fail_loc=0x196
+	local count=$(precreated_ost_obj_count 0 0)
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(12) Expect 'scanning', but got '$STATUS'"
+	createmany -o $DIR/$tdir/f $((count + 32))
+	do_facet ost1 $LCTL set_param fail_loc=0
 
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0
-	do_facet $SINGLEMDS $LCTL set_param fail_val=0
-	sleep 5
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(13) Expect 'completed', but got '$STATUS'"
+	umount_client $MOUNT || error "(1) Fail to stop client!"
+
+	stop ost1 || error "(2) Fail to stop ost1"
+
+	start ost1 $(ostdevname 1) $MOUNT_OPTS_NOSCRUB ||
+		error "(3) Fail to start ost1"
 
-	FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ -z "$FLAGS" ] || error "(14) Expect empty flags, but got '$FLAGS'"
+	mount_client $MOUNT || error "(4) Fail to start client!"
+
+	ls -ail $DIR/$tdir > /dev/null 2>&1 && error "(5) ls should fail"
+
+	$START_SCRUB_ON_OST -r || error "(6) Fail to start OI scrub on OST!"
+
+	wait_update_facet ost1 "$LCTL get_param -n \
+		osd-*.$(facet_svc ost1).oi_scrub |
+		awk '/^status/ { print \\\$2 }'" "completed" 6 ||
+		error "(7) Expected '$expected' on ost1"
+
+	ls -ail $DIR/$tdir > /dev/null || error "(8) ls should succeed"
 }
-#run_test 10b "non-stopped OI scrub should auto restarts after MDS remount (2)"
+run_test 13 "OI scrub can rebuild missed /O entries"
 
-test_11() {
-	echo "stopall"
-	stopall > /dev/null
-	echo "formatall"
-	formatall > /dev/null
-	echo "setupall"
-	setupall > /dev/null
+test_14() {
+	[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] &&
+		skip "ldiskfs special test"
 
-	local CREATED=100
-	local tname=`date +%s`
-	rm -rf $MOUNT/$tname > /dev/null
-	mkdir $MOUNT/$tname || error "(1) Fail to mkdir $MOUNT/$tname"
+	check_mount_and_prep
+	$LFS setstripe -c 1 -i 0 $DIR/$tdir
 
-	createmany -o $MOUNT/$tname/f $CREATED || error "(2) Fail to create!"
+	#define OBD_FAIL_OSD_COMPAT_NO_ENTRY		0x196
+	do_facet ost1 $LCTL set_param fail_loc=0x196
+	local count=$(precreated_ost_obj_count 0 0)
 
-	cleanup_mount $MOUNT
-	do_facet $SINGLEMDS $LCTL clear
-	start_full_debug_logging
-	# reset OI scrub start point by force
-	$START_SCRUB -r || error "(3) Fail to start OI scrub!"
-	sleep 3
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(4) Expect 'completed', but got '$STATUS'"
+	createmany -o $DIR/$tdir/f $((count + 1000))
+	do_facet ost1 $LCTL set_param fail_loc=0
 
-	# OI scrub should skip the new created objects for the first accessing
-	local SKIPPED=$($SHOW_SCRUB | awk '/^noscrub/ { print $2 }')
-	# notice we're creating a new llog for every OST on every startup
-	# new features can make this even less stable, so we only check
-	# that the number of skipped files is less than 2x the number of files
-	local MAXIMUM=$((CREATED * 2))
-	local MINIMUM=$((CREATED + 1)) # files + directory
-	[ $SKIPPED -ge $MAXIMUM -o $SKIPPED -lt $MINIMUM ] &&
-	error "(5) Expect [ $MINIMUM , $MAXIMUM ) objects skipped, got $SKIPPED"
+	umount_client $MOUNT || error "(1) Fail to stop client!"
 
-	# reset OI scrub start point by force
-	$START_SCRUB -r || error "(6) Fail to start OI scrub!"
-	sleep 3
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(7) Expect 'completed', but got '$STATUS'"
+	stop ost1 || error "(2) Fail to stop ost1"
 
-	# OI scrub should skip the new created object only once
-	SKIPPED=$($SHOW_SCRUB | awk '/^noscrub/ { print $2 }')
-	[ $SKIPPED -eq 0 ] ||
-		error "(8) Expect 0 objects skipped, but got $SKIPPED"
+	echo "run e2fsck"
+	run_e2fsck $(facet_host ost1) $(ostdevname 1) "-y" ||
+		error "(3) Fail to run e2fsck error"
 
-	stop_full_debug_logging
-	restore_mount $MOUNT || error "(9) Fail to start client!"
-	rm -rf $MOUNT/$tname > /dev/null
-}
-run_test 11 "OI scrub skips the new created objects only once"
+	start ost1 $(ostdevname 1) $OST_MOUNT_OPTS ||
+		error "(4) Fail to start ost1"
 
-test_12() {
-	echo "stopall"
-	stopall > /dev/null
-	echo "formatall"
-	formatall > /dev/null
-	echo "setupall"
-	setupall > /dev/null
+	mount_client $MOUNT || error "(5) Fail to start client!"
 
-	mkdir -p $DIR/$tdir
-	$SETSTRIPE -c 1 -i 0 $DIR/$tdir
+	local LF_REPAIRED=$($SHOW_SCRUB_ON_OST |
+			    awk '/^lf_repa[ir]*ed/ { print $2 }')
+	[ $LF_REPAIRED -ge 1000 ] ||
+		error "(6) Some entry under /lost+found should be repaired"
 
-	#define OBD_FAIL_OSD_COMPAT_INVALID_ENTRY		0x195
-	do_facet ost1 $LCTL set_param fail_loc=0x195
-	createmany -o $DIR/$tdir/f 1000
+	ls -ail $DIR/$tdir > /dev/null || error "(7) ls should succeed"
+
+	stopall
 
-	echo "stopall"
-	stopall > /dev/null
-	echo "setupall"
+	echo "run e2fsck again after LFSCK"
+	run_e2fsck $(facet_host ost1) $(ostdevname 1) "-y" ||
+		error "(8) Fail to run e2fsck error"
+}
+run_test 14 "OI scrub can repair OST objects under lost+found"
+
+test_15() {
+	local repaired
+
+	formatall > /dev/null
 	setupall > /dev/null
 
-	do_facet ost1 $LCTL set_param fail_loc=0
-	local STATUS=$($SHOW_SCRUB_ON_OST | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(1) Expect 'init', but got '$STATUS'"
+	scrub_prep 20 1
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
+	scrub_check_status 3 init
+	[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] ||
+		scrub_check_flags 4 recreated,inconsistent
+
+	# run under dryrun mode
+	scrub_start 5 --dryrun
+	scrub_check_status 6 completed
+	if [ $(facet_fstype $SINGLEMDS) != "ldiskfs" ]; then
+		scrub_check_flags 7 inconsistent
+		repaired=2
+	else
+		scrub_check_flags 7 recreated,inconsistent
+		repaired=20
+	fi
+	scrub_check_params 8 dryrun
+	scrub_check_repaired 9 $repaired 1
+
+	# run under dryrun mode again
+	scrub_start 10 --dryrun
+	scrub_check_status 11 completed
+	if [ $(facet_fstype $SINGLEMDS) != "ldiskfs" ]; then
+		scrub_check_flags 12 inconsistent
+	else
+		scrub_check_flags 12 recreated,inconsistent
+	fi
+	scrub_check_params 13 dryrun
+	scrub_check_repaired 14 $repaired 1
+
+	# run under normal mode
+	scrub_start 15
+	scrub_check_status 16 completed
+	scrub_check_flags 17 ""
+	scrub_check_params 18 ""
+	scrub_check_repaired 19 $repaired 0
+
+	# run under normal mode again
+	scrub_start 20
+	scrub_check_status 21 completed
+	scrub_check_flags 22 ""
+	scrub_check_params 23 ""
+	scrub_check_repaired 24 0 0
+}
+run_test 15 "Dryrun mode OI scrub"
 
-	ls -ail $DIR/$tdir > /dev/null 2>&1 && error "(2) ls should fail"
+test_16() {
+	check_mount_and_prep
+	scrub_enable_index_backup
 
-	sleep 3
-	local STATUS=$($SHOW_SCRUB_ON_OST | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(3) Expect 'completed', but got '$STATUS'"
+	#define OBD_FAIL_OSD_INDEX_CRASH	0x199
+	do_nodes $(comma_list $(mdts_nodes)) $LCTL set_param fail_loc=0x199
+	scrub_prep 0
+	do_nodes $(comma_list $(mdts_nodes)) $LCTL set_param fail_loc=0
 
-	ls -ail $DIR/$tdir > /dev/null 2>&1 || error "(4) ls should succeed"
+	echo "starting MDTs without disabling OI scrub"
+	scrub_start_mds 1 "$MOUNT_OPTS_SCRUB"
+	mount_client $MOUNT || error "(2) Fail to start client!"
+	scrub_check_data 3
+	scrub_disable_index_backup
 }
-run_test 12 "OI scrub can rebuild invalid /O entries"
+run_test 16 "Initial OI scrub can rebuild crashed index objects"
 
 # restore MDS/OST size
 MDSSIZE=${SAVED_MDSSIZE}
 OSTSIZE=${SAVED_OSTSIZE}
+OSTCOUNT=${SAVED_OSTCOUNT}
 
 # cleanup the system at last
-formatall
+REFORMAT="yes" cleanup_and_setup_lustre
 
 complete $SECONDS
+check_and_cleanup_lustre
 exit_status