diff --git a/tests/io_scenario_hdd.cfg b/tests/io_scenario_hdd.cfg
index 3238503..0c36324 100644
--- a/tests/io_scenario_hdd.cfg
+++ b/tests/io_scenario_hdd.cfg
@@ -6,14 +6,14 @@
 iodepth=1
 
 filename={FILENAME}
-NUM_ROUNDS={NUM_ROUNDS}
+NUM_ROUNDS=7
 
 ramp_time=5
 size=10Gb
 runtime=30
 
 # ---------------------------------------------------------------------
-# check different thread count, sync mode. (latency, bw) = func(th_count)
+# check different thread count, sync mode. (latency, iops) = func(th_count)
 # ---------------------------------------------------------------------
 [hdd_test_{TEST_SUMM} * {NUM_ROUNDS}]
 blocksize={% 4k %}
@@ -22,7 +22,8 @@
 numjobs={% 1, 5, 10, 15, 20, 30, 40, 80, 120 %}
 
 # ---------------------------------------------------------------------
-# check different thread count, direct read mode. (latency, bw) = func(th_count)
+# check different thread count, direct read mode. (latency, iops) = func(th_count)
+# also check iops for randread
 # ---------------------------------------------------------------------
 [hdd_test_{TEST_SUMM} * {NUM_ROUNDS}]
 blocksize={% 4k %}
@@ -31,17 +32,20 @@
 numjobs={% 1, 5, 10, 15, 20, 30, 40, 80, 120 %}
 
 # ---------------------------------------------------------------------
-# check IOPS read/write. (latency, bw) = func(th_count)
+# check different thread count, direct read/write mode. (bw, iops) = func(th_count)
+# also check BW for seq read/write.
+# ---------------------------------------------------------------------
+[hdd_test_{TEST_SUMM} * {NUM_ROUNDS}]
+blocksize={% 1m %}
+rw={% read, write %}
+direct=1
+numjobs={% 1, 5, 10, 15, 20, 30, 40, 80, 120 %}
+
+# ---------------------------------------------------------------------
+# check IOPS randwrite.
 # ---------------------------------------------------------------------
 [hdd_test_{TEST_SUMM} * {NUM_ROUNDS}]
 blocksize=4k
-rw={% randwrite, randread %}
+rw=randwrite
 direct=1
 
-# ---------------------------------------------------------------------
-# check BW for seq read/write. (latency, bw) = func(th_count)
-# ---------------------------------------------------------------------
-[hdd_test_{TEST_SUMM} * {NUM_ROUNDS}]
-blocksize=1m
-rw={% write, read %}
-direct=1