GiB iyo GB: Isbeddelka Saxda ah ee Kala Duwanaanha Kaydinta Dhijitaalka
Waa maxay farqiga u dhexeeya GiB iyo GB?
Marka aad iibsato darawal adag (hard drive) oo ah 1 TB, oo aad ku xidho kombiyuutarka Windows, waxaad arkaysaa inuu muujinayo qiyaastii 931 GiB. Tan waxay dad badan ku wareerisaa, sababtuna tahay laba hab oo kala duwan oo loo cabbiro kaydinta dhijitaalka: nidaamka tobanle (decimal) iyo nidaamka laba-geesoodka (binary). Boggan waxa uu si gaar ah uga hadlayaa isbeddelka u dhexeeya Gibibyte (GiB) iyo Gigabyte (GB) — labadan unug oo midba midka kale u eg yahay balse xisaab ahaan kala duwan.
Hal GiB waxa ay la mid tahay 1,073,741,824 byte (2^30), halka hal GB ay tahay 1,000,000,000 byte (10^9). Farqiga u dhexeeya waa 7.37% — taas oo ah 1 GiB = 1.073741824 GB. Marka la eego dhinaca kale, 1 GB = 0.931322574615 GiB. Nambaradan saxda ah ayaa ah kuwa aan isticmaalno boggan, iyada oo aan la qiyaasayn.
Sababta farqigu u jiro waxay ku xidhan tahay taariikhda horumarinta kombiyuutarka. Nidaamka laba-geesoodka ah wuxuu ka yimid xusuusta kombiyuutarka oo lagu xisaabiyo awoodaha 2 (2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, iwm). Laakiin shirkadaha soo saara darawalada waxay doorteen nidaamka tobanle sababtoo ah waa mid fudud oo waafaqsan heerarka SI (Systeme International). Tani waxay keenaysaa in darawalka lagu xayeysiiyo "1 TB" balse kombiyuutarku uu u arkayo sida "0.909 TiB" ama "931 GiB".
Boggan waa kan kaliya ee si gaar ah u bixiya isbeddelka tooska ah ee labadan unug, isagoo adeegsanaya qodobka saxda ah iyo jihada uu isticmaaluhu doorto (GiB → GB ama GB → GiB). Qalabka kale ee internetka badanaa waxay isticmaalaan qiyaas ama waxay ku khaldamaan unugyada.
Isbeddelka saxda ah iyo qaacidada loo isticmaalo
Qaacidada isbeddelka waa mid toos ah oo kicinaysa. Haddii aad rabto inaad u beddesho GiB una beddesho GB, waxaad ku dhufataa 1.073741824:
GB = GiB × 1.073741824
Tusaale: 5 GiB = 5 × 1.073741824 = 5.36870912 GB.
Haddii aad rabto GB una beddesho GiB, waxaad isticmaashaa qodobka rogan:
GiB = GB × 0.931322574615
Tusaale: 10 GB = 10 × 0.931322574615 = 9.31322574615 GiB.
Nambaradan waa sax oo dhamaystiran, waxaana laga soo qaatay qeexida rasmiga ah ee IEC 60027-2 iyo IEEE 1541. Dhibcaha tobanle ee soo baxa waxa laga yaabaa in la soo koobo (rounded) marka la soo bandhigo, laakiin xisaabta hoose waa mid sax ah oo aan la gooyn. Nambarada taban macno ugama laha kaydinta dhijitaalka, sidaa darteed qalabku wuxuu u qaataa in qiimaha la geliyo uu yahay mid aan tabanayn. Eber wuxuu u beddelmaa eber labada jiho.
Tiro aad u weyn (tusaale boqollaal terabyte) sidoo kale waa la xisaabin karaa iyada oo aan la cufin qodobka, sababtoo ah waa isku dhuftid toos ah. Qalabka boggan wuxuu u oggolaanayaa isticmaaluhu inuu doorto inta dhibic ee tobanle uu rabo inuu arko — tusaale 2, 4, ama 6 dhibcood — laakiin xisaabta kama badalo.
Tusaale dhab ah: Darawalka 1 TB oo ah 931 GiB
Tani waa midda ugu caansan ee dadka ku wareerta. Aynu qaadano inaad iibsatay darawal adag oo lagu xayeysiiyay "1 TB". Marka aad ku xidho kombiyuutarka, Windows wuxuu muujinayaa "931 GB" ama, si sax ah, "931 GiB". Sidee tan loo xisaabiyaa?
Darawalku waa 1 terabyte = 1,000,000,000,000 bytes. Haddii aan u beddelno GiB, waxaan u kala qaybinaynaa tirada bytes ee 1 GiB (1,073,741,824):
1,000,000,000,000 ÷ 1,073,741,824 = 931.322574615... GiB.
Taasi waa 931 GiB marka la soo koobo. Haddaba, haddii aad rabto inaad u beddesho 1 TiB una beddesho TB, waxaad isticmaashaa qodobka tooska ah:
1 TiB = 1,099,511,627,776 bytes = 1,099,511,627,776 ÷ 1,000,000,000,000 = 1.099511627776 TB.
Darawalka "1 TB" ee laga soo iibsaday dukaanka ayaa dhab ahaan leh 0.909 TiB oo keliya, ama 931 GiB. Tani ma aha khiyaamo; waa kala duwanaanshaha heerarka cabbiraadda.
Isticmaalaha u baahan inuu xaqiijiyo tirada xaqiiqada ah wuxuu isticmaali karaa boggan: geli "1" oo doorto "TB → TiB" ama "GB → GiB" (sida caadiga ah 1 TB waa unug tobanle). Laakiin qalabkayagu wuxuu u gaar yahay GiB iyo GB oo keliya, ma aha terabyte.
Yaa u baahan qalabkan?
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Iibsadaha darawalka ama sanduuqa xusuusta: Qof kasta oo iibsaday SSD 256 GB ah oo arka "238 GiB" gudaha kombiyuutarka, wuxuu u baahan yahay inuu ogaado in 256 GB = 256 × 0.931322574615 = 238.418579 GiB. Boggan wuxuu siinayaa xisaabta saxda ah si loo xaqiijiyo.
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Injineerka daruurta: AWS EBS, Google Cloud, iyo Azure waxay inta badan isticmaalaan unugyada tobanle (GB) marka la xisaabinayo kharashka, laakiin waxay isticmaalaan unugyada laba-geesoodka (GiB) marka la qeexayo mugga kaydka. Injineerka u baahan inuu isbarbar dhigo mugga EBS volume-ka "500 GiB" iyo qiimaha "500 GB" waa inuu beddelaa.
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Maamulaha nidaamka (sysadmin): Marka la dhigo disk virtual ah, hypervisor-ka (sida VMware) wuxuu isticmaalaa GiB, halka nidaamka hawlgalka (sida Linux) uu isticmaali karo GB. Kala duwanaanshahan waa in la xisaabtamo si looga fogaado qalad.
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Ardayga baranaya qaab-dhismeedka kombiyuutarka: Fahamka farqiga u dhexeeya kowdhiska tobanle iyo kowdhiska laba-geesoodka waa qayb muhiim ah oo ka mid ah cilmiga kombiyuutarka. Boggan wuxuu siinayaa tusaale shaqo oo taaban karo.
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Qof kasta oo ku shaqeeya xisaabinta faylasha: Haddii aad isticmaalayso xaashida xisaabta (spreadsheet) ama script-ka si aad ugu beddesho cabbirrada faylasha, qodobka saxda ah waa lagama maarmaan. Qiyaasta "0.93" waa ku filan maaha marka la xisaabinayo tiro badan.
Heerarka rasmiga ah: IEC 60027-2 iyo IEEE 1541
Si loo xalliyo jahwareerka ka dhashay isticmaalka "giga" oo loola jeedo laba wax oo kala duwan, Hay'adda Caalamiga ah ee Korontada (IEC) waxay soo saartay heerka IEC 60027-2 sanadkii 1998. Heerkan waxa uu qeexayaa magacyo cusub oo loogu talagalay awoodaha 2: kibi (Ki, 2^10), mebi (Mi, 2^20), gibi (Gi, 2^30), tebi (Ti, 2^40), ivm. Sida rasmiga ah, "gigabyte" waa 10^9 byte, "gibibyte" waa 2^30 byte. Heerkan waxa ansixiyay IEEE (heerka 1541) iyo ISO/IEC 80000-13.
Marka la eego sharciga, shirkadaha soo saara darawalada uma baahna inay adeegsadaan magacyada "gibi" sababtoo ah waxay raacsan yihiin heerka SI ee tobanle. Balse nidaamyada hawlgalka (sida Windows, macOS, Linux) waxay dooran karaan inay isticmaalaan mid ka mid ah labada nidaam. Windows waxay isticmaashaa GiB (iyada oo qalad ah ugu yeerto "GB"), halka macOS 10.6+ ay u adeegsato GB si sax ah. Linux-ka waa ku kala duwan yahay: qalabka qaarkood (sida df) waxay muujinayaan GiB, qaar kalena GB.
Boggan wuxuu ka soo horjeedaa jahwareerka isagoo si cad u kala saaraya labada unug oo bixinaya isbeddelka saxda ah. Ma isticmaalo qiyaas sida "1 GiB ≈ 1.07 GB" ee dadka qaar ku qanacsan yahay; halkan waa 1.073741824.
FAQ (Su'aalaha Inta Badan La Isweydiiyo)
1. Miyaan isticmaali karaa qodobka 1.07 ama 0.93? Waa lagu talinayo inaad isticmaashid qodobka saxda ah si aad u hesho natiijo sax ah. 1.07 waa qiyaas, taasoo keeni karta khalad weyn marka tiro badan la xisaabinayo. Tusaale ahaan, 1000 GiB × 1.07 = 1070 GB, halka saxda ah uu yahay 1073.741824 GB — farqi dhan 3.7 GB.
2. Maxaan u arkaa "931 GB" gudaha Windows-ka marka darawalku yahay "1 TB"? Windows waxay ku qaladaysaa magaca "GB" iyada oo loola jeedo Gibibyte (GiB). Darawalka "1 TB" wuxuu dhab ahaantii leeyahay 1,000,000,000,000 bytes, taas oo ah 931.322... GiB. Windows waa inay muujisaa "931 GiB" laakiin waxay isticmaashaa summada "GB". Tan waxay ku khaldan tahay heerka IEC, laakiin waa dhaqan caadi ah.
3. Ma waxaa jira farqi u dhexeeya GiB iyo GB marka la eego xawaaraha internetka? Haa, laakiin xawaaraha internetka waxaa badanaa lagu cabbiraa megabits (Mb) ama megabytes (MB) halkii unug tobanle. Haddii laguu sheego "100 MB/s", waa 100,000,000 bytes/ilbiriqsi. Haddii aad u beddesho GiB, waa 0.093132 GiB/ilbiriqsi. Si kastaba ha ahaatee, taraafigga network-ka wuxuu inta badan isticmaalaa unugyada tobanle, marka khaladku yar yahay.
4. Sideen u xisaabiyaa isbeddelka 500 GiB oo GB ah? 500 × 1.073741824 = 536.870912 GB. Haddii aad u baahan tahay GB oo keliya, ku dhufo 1.073741824.
5. Ma jiraa xaddi ugu badan oo tirooyin ah? Maya. Qalabku wuxuu xisaabin karaa tiro kasta oo togan, ilaa iyo inta qaabka xisaabta uu awoodo. Tusaale, 10,000 GiB = 10,737.41824 GB.
6. Waa maxay sababta qalabkan uu u kala saaray GiB iyo GB, halka qalabka kale ay isku qasan yihiin? Sababtoo ah boggan wuxuu u gaar yahay isbeddelkan oo keliya, qodobka saxda ahna waa lagu dabaqaa jihada dooratay. Qalabka guud ee internetka waxay inta badan isticmaalaan qiyaas ama waxay u qaataan in GiB iyo GB isku mid yihiin, taas oo khalad ah.