#!/usr/bin/pythonimport os, time, mathrun_tests = 3devices = os.listdir('/sys/block/')check_devices = []reads = {}writes = {}for dev in devices:    if dev.startswith('md') or dev.startswith('sd') or dev.startswith('hd'):        check_devices.append(dev)        reads[dev] = []        writes[dev] = []check_devices = sorted(check_devices)for t in range(run_tests + 1):    for dev in check_devices:        file_data = open('/sys/block/%s/stat' % dev).readline().strip().split(' ')        clean = []        for num in file_data:            if num != '':                clean.append(int(num))        reads[dev].append(clean[0])        writes[dev].append(clean[4])    print reads[dev]    print writes[dev]    time.sleep(1)print "Device    Read    Write"print "--------------------------------------"for dev in check_devices:    clean_reads = []    reads[dev].reverse()    for test, result in enumerate(reads[dev]):        if test > 0:            clean_reads.append(float(reads[dev][test - 1] - result))    rops = int(math.ceil(sum(clean_reads) / len(clean_reads)))    clean_writes = []    writes[dev].reverse()    for test, result in enumerate(writes[dev]):        if test > 0:            clean_writes.append(float(writes[dev][test - 1] - result))    wops = int(math.ceil(sum(clean_writes) / len(clean_writes)))    print "%s %s %s" % (dev.ljust(13), repr(rops).ljust(11), repr(wops))