diff --git a/hard_sleep.py b/hard_sleep.py
new file mode 100755
index 0000000..57e9a91
--- /dev/null
+++ b/hard_sleep.py
@@ -0,0 +1,119 @@
+#!/usr/bin/python
+from collections import OrderedDict
+from multiprocessing import Process, Queue
+from pprint import pprint
+from datetime import datetime 
+from time import sleep
+import argparse
+from glob import iglob
+import re 
+import pickle
+from subprocess import call
+def diskstats_parse(dev=None):
+    file_path = '/proc/diskstats'
+    result = {}
+
+    # ref: http://lxr.osuosl.org/source/Documentation/iostats.txt
+    columns_disk = ['m', 'mm', 'dev', 'reads', 'rd_mrg', 'rd_sectors',
+                    'ms_reading', 'writes', 'wr_mrg', 'wr_sectors',
+                    'ms_writing', 'cur_ios', 'ms_doing_io', 'ms_weighted']
+
+    columns_partition = ['m', 'mm', 'dev', 'reads', 'rd_sectors', 'writes', 'wr_sectors']
+
+    lines = open(file_path, 'r').readlines()
+    for line in lines:
+        if line == '': continue
+        split = line.split()
+        if len(split) == len(columns_disk):
+            columns = columns_disk
+        elif len(split) == len(columns_partition):
+            columns = columns_partition
+        else:
+            # No match
+            continue
+
+        data = dict(zip(columns, split))
+        if dev != None and dev != data['dev']:
+            continue
+        for key in data:
+            if key != 'dev':
+                data[key] = int(data[key])
+        result[data['dev']] = data
+    if dev is not None and dev in result:
+        return result[dev]
+    else:
+        return result
+
+def getRotationals():
+    fileRegex =re.compile(r'^\/sys\/block\/([sh]d[\w][\d]*)\/queue\/rotational$')
+    for files in iglob('/sys/block/[sh]d*/queue/rotational'):
+        devNameMatcher=fileRegex.match(files)
+        if devNameMatcher is None:
+            continue
+        else:
+            rotational=False
+            if open(files,'r').readline().strip()=='1':
+                yield devNameMatcher.group(1)
+            else:
+                continue
+    raise StopIteration()
+
+def chooseSleepTarget(target=[]):
+    if len(target)==0:
+        return set(disk for disk in getRotationals())
+    else:
+        return set(target).intersection(getRotationals())
+def storeDiskstat(data=diskstats_parse()):
+    with open('/dev/shm/diskstat', 'wb') as f:
+        pickle.dump(data,f)
+def loadDiskstat():
+    with open('/dev/shm/diskstat', 'rb') as f:
+        return pickle.load(f)
+
+def chooseActivityDisk(previous,statData):
+    activityDisks=set(previous.keys()).intersection(statData.keys())
+    return set(disk for disk in activityDisks if len(statData[disk].items()- previous[disk].items()) >0)
+
+def doSleep(disk):
+    dtStr=datetime.now().ctime()
+    call(['/usr/bin/logger','-s', "%s %s Sleeping.."%(dtStr,disk)])
+    call(['/usr/bin/sg_start','--stop','/dev/%s'%disk])
+    #call(['/usr/bin/hdparm','-Y','/dev/%s'%disk])
+    #sleep(0.6)
+    #call(['/usr/bin/hdparm','-Y','/dev/%s'%disk])
+    #call(['/bin/sh', '-c', 'echo %s'%disk])
+    #sleep(5)
+
+def processSleepies(sleepies):
+    for disk in sleepies:
+        p = Process(target=doSleep, args=(disk,))
+        p.start()
+        yield p
+    raise StopIteration()
+
+def entry():
+    parser = argparse.ArgumentParser(description='Sleep Rotational Disks')
+    parser.add_argument('devices', metavar='DEV', type=str, nargs='*',
+                   help='[Default:All rotational Disks]')
+    parser.add_argument('-n', '--now', dest='now', action='store_true',
+                   help='Sleep Rotationals without IO activity')
+    args = vars(parser.parse_args())
+    
+    prevStatData=loadDiskstat()
+    statData=diskstats_parse()
+
+    target=chooseSleepTarget(args['devices'])
+    if args['now']:
+        isSleepProcessed=[processed for processed in processSleepies(target)]
+        for p in isSleepProcessed:
+            p.join()
+    else:
+        activities=chooseActivityDisk(prevStatData,statData)
+        sleepies=target - activities
+        isSleepProcessed=[processed for processed in processSleepies(sleepies)]
+        for p in isSleepProcessed:
+            p.join()
+        storeDiskstat(statData)
+    
+if __name__ == '__main__':
+    entry()
diff --git a/hard_sleep.sh b/hard_sleep.sh
new file mode 100755
index 0000000..d7f8299
--- /dev/null
+++ b/hard_sleep.sh
@@ -0,0 +1,44 @@
+#!/bin/bash
+# Declare an array of delimited parameters.
+ARRAY=(${@})
+ 
+# Declare a numeric constant of array elements.
+ELEMENTS=${#ARRAY[@]}
+ 
+# Does the parameter account agree with array elements.
+#if [[ ${#} = ${#ARRAY[@]} ]]; then
+#  echo "Parameters match exploded array elements."
+#else
+#  echo "Parameters ["${#}"] don't match exploded array elements ["${ELEMENTS}"]."
+#fi
+# 
+## Echo line break.
+#echo ""
+# 
+# Echo the parameter list.
+. /etc/profile
+function log_stat {
+	if [ ! -f /dev/shm/1 ] ;
+	then
+		touch /dev/shm/1 /dev/shm/2
+	fi
+	mv /dev/shm/1 /dev/shm/2
+	cat /proc/diskstats > /dev/shm/1
+}
+
+function sleep_check {
+	HD=$1
+	if [ "$(diff /dev/shm/1 /dev/shm/2 | grep $HD )" =  "" ] ;
+	then 
+		logger -s "$(date -R) $HD Sleeping.."
+#		/usr/bin/sg_start --stop /dev/$HD &
+		/usr/bin/hdparm -Y /dev/$HD 
+		/usr/bin/sleep 0.6
+		/usr/bin/hdparm -Y /dev/$HD 
+	fi
+}
+log_stat
+for (( i = 0; i < ${ELEMENTS}; i++ )); do
+#  echo "  ARRAY["${i}"]=["${ARRAY[${i}]}"]"
+	sleep_check ${ARRAY[${i}]} &
+done