Cov Ntaub Ntawv Qiv Cov Ntaub Ntawv (FAT) yog dab tsi?

Txhua yam koj yuav tsum paub txog FAT32, exFAT, FAT16, & FAT12

Cov Ntaub Ntawv Qiv Txhaum Cai (FAT) yog ib qho file system uas tsim los ntawm Microsoft hauv xyoo 1977.

FAT tseem siv tau hnub no ua cov ntaub ntawv tsim nyog rau kev siv tshuab ntaiv thiab txav tau, muaj peev xwm ceev xws li flash drives thiab lwm lub cim-state nco li SD cards.

FAT yog thawj cov ntaub ntawv kaw tseg rau hauv tag nrho Microsoft lub lag luam khiav lag luam los ntawm MS-DOS los ntawm Windows Me. Txawm tias FAT tseem yog ib txoj kev txhawb nqa tshiab ntawm Microsoft lub operating system tshiab, NTFS yog thawj cov ntaub ntawv siv los siv cov hnub no.

Cov Ntaub Ntawv Tso Tawm Cov Ntaub Ntawv Cov ntaub ntawv tau pom muaj kev nce qib dhau los vim yog qhov xav tau los pab txhawb nqa cov ntawv nyuaj loj thiab cov ntaub ntawv loj dua.

Nov yog ntau ntau ntawm qhov txawv versions ntawm FAT cov ntaub ntawv:

FAT12 (12-ntsis cov ntaub ntawv cov lus qhia)

Thawj cov lus siv ntawm FAT cov ntaub ntawv kaw lus, FAT12, yog pib hauv xyoo 1980, muaj cai nrog rau thawj cov qauv ntawm DOS.

FAT12 yog thawj cov ntaub ntawv kaw lus rau Microsoft operating systems mus txog MS-DOS 3.30 tab sis kuj tau siv nyob rau hauv ntau lub tshuab los ntawm MS-DOS 4.0. FAT12 tseem yog cov ntaub ntawv uas siv los siv rau ntawm lub ntis diskette koj yuav pom hnub no.

FAT12 txhawb nqa qhov ntau thiab tsawg ntawm qhov ntau thiab tsawg ntawm 16 MB uas siv cov 4 KB los yog 32 MB siv 8 KB, nrog rau 4,084 cov ntaub ntawv ntau ntawm ib ntim (thaum siv 8KB pawg).

Cov npe hauv qab ntawm FAT12 ua tsis tau siab tshaj qhov cim txwv tsis pub tshaj ntawm 8 cim, ntxiv rau 3 rau kev txuas ntxiv .

Muaj ntau cov ntaub ntawv tso tawm ua ntej hauv FAT12, xws li muab zais , nyeem ntawv nkaus xwb , kaw lus , thiab daim ntawv cim ntim .

Lus Cim: FAT8, pib thaum xyoo 1977, yog thawj qhov tseeb ntawm FAT cov ntaub ntawv tiam sis tau siv tsawg thiab tsuas yog siv qee lub davhlau ya nyob sab hauv tshuab computer.

FAT16 (16-Flexible File Table)

Qhov thib ob txoj kev siv FAT yog FAT16, thawj zaug pib hauv 1984 hauv PC DOS 3.0 thiab MS-DOS 3.0.

Ib ntsis ntawm FAT16, hu ua FAT16B, yog thawj cov ntaub ntawv kaw lus rau MS-DOS 4.0 mus txog MS-DOS 6.22. Pib nrog MS-DOS 7.0 thiab Windows 95, ib tug ntxiv tuaj yeem ua version, hu ua FAT16X, yog siv xwb.

Nyob ntawm qhov kev khiav hauj lwm thiab cov siv me me, qhov siab tshaj plaws tsav tus FAT16-formatted tsav yuav yog qhov ntev ntawm 2 GB mus txog 16 GB, tom kawg nkaus hauv Windows NT 4 nrog 256 KB pawg.

Cov ntaub ntawv loj li cas ntawm FAT16 drives max tawm ntawm 4 GB nrog loj cov ntaub ntawv txhawb enabled, los yog 2 GB tsis tau nws.

Qhov ntau ntawm cov ntaub ntawv uas tuaj yeem nyob rau ntawm lub ntim FAT16 yog 65,536. Ib yam li nrog FAT12, cov npe cov npe tau raug txwv rau 8 + 3 cim tiam sis tau ncua mus txog 255 cim pib nrog qhov rais 95.

Cov ntaub ntawv archive yog ua tswvcuab hauv FAT16.

FAT32 (32-ntsis cov ntaub ntawv cov lus qhia)

FAT32 yog qhov tseeb ntawm FAT cov ntaub ntawv. Nws tau nkag rau hauv 1996 rau Windows 95 OSR2 / MS-DOS 7.1 cov neeg siv thiab yog thawj cov ntaub ntawv kaw lus rau tus neeg siv lub tshuab qhov rais los ntawm Windows Me.

FAT32 txhawb kev tsav tsheb ntau txog 2 kab mob TB lossis txawm tias muaj 16 qe nrog 64 KB pawg.

Ib yam li FAT16, ua cov ntawv loj li cas ntawm FAT32 drives max ntawm 4 GB nrog loj cov ntaub ntawv txhawb muab rau lossis 2 GB tsis tau nws. Ib tug hloov lub version ntawm FAT32, hu ua FAT32 + , txhawb cov ntaub ntawv kom ze rau 256 GB loj!

Mus txog 268,173,300 cov ntaub ntawv yuav muaj nyob rau hauv lub ntim FAT32 tsuav nws siv 32 KB pawg.

exFAT (Cov Ntaub Ntawv Ntxiv Ntxiv)

ExFAT, ua ntej nkag tau rau hauv 2006, tseem muaj lwm cov ntaub ntawv tsim los ntawm Microsoft txawm tias nws tsis yog qhov "tom ntej" FAT version tom qab FAT32.

exFAT feem ntau yog npaj siv los ntawm cov khoom siv xovtooj xws li flash drives, SDHC thiab SDXC cards, thiab lwm yam.

exFAT teb yuav txhawb nqa portable media cia li mus txog 512 TiB nyob rau hauv cov me me tab sis theoretically yuav txhawb nqa loj li 64 ZiB, uas yog loj dua loj tshaj li cov xov xwm muaj raws li ntawm no sau ntawv.

Txhawb kev txhawb rau 255 cov cim filenames thiab kev txhawb nqa txog li 2,796,202 cov ntaub ntawv ib phau ntawv yog ob lub ntsiab lus ntawm kev siv exFAT.

ExFAT cov ntaub ntawv yog txhawb los ntawm yuav luag txhua lub tshuab Windows (cov laus dua nrog rau kev xaiv tshiab), Mac OS X (10.6.5+), zoo li hauv TV, xov xwm, thiab lwm yam khoom siv.

Tsiv Ntaub Ntawv Ntawm NTFS mus rau FAT Systems

Cov ntaub ntawv encryption, cov ntaub ntawv compression , kwv permissions, disk quotas, thiab cov ntaub ntawv indexed muaj nyob rau ntawm NTFS cov ntaub ntawv xwb - tsis FAT . Lwm cov cwj pwm, zoo li cov feem ntau uas kuv hais hauv kev sib tham saum toj no, kuj muaj nyob rau NTFS.

Yog tias koj muab cov ntaub ntawv encrypted los ntawm NTFS ntim rau hauv qhov chaw FAT-formatted, cov ntaub ntawv poob nws encryption xwm, lub ntsiab lus ntawm cov ntaub ntawv yuav siv tau li ib txwm, tsis-encrypted ntaub ntawv. Decrypting ib cov ntaub ntawv li no tsuas yog ua tau rau tus neeg siv thawj zaug uas encrypted cov ntaub ntawv, los yog lwm tus neeg siv uas tau raug tso cai los ntawm thawj tus tswv.

Zoo li cov ntaub ntawv encrypted, vim FAT tsis txhawb compression, compressed ntaub ntawv cia li decompressed yog nws copied tawm ntawm NTFS ntim thiab mus rau FAT ntim. Piv txwv, yog tias koj luam cov ntaub ntawv compressed los ntawm NTFS ib qho nyuaj tsav mus rau lub FAT diskette disk, cov ntaub ntawv yuav cia li pib ua ntej nws tau txais kev cawm dim rau lub khoob khoob cia vim tias FAT cov ntaub ntawv tsim tawm ntawm cov hom phiaj uas tsis muaj peev xwm khaws cia cov ntaub ntawv .

Kev nyeem ntawv tau zoo tshaj ntawm FAT

Thaum nws txoj kev dhau qhov kev sib tham hauv FAT tham ntawm no, yog koj xav paub ntau ntxiv txog li cas FAT12, FAT16, thiab FAT32 formatted drives yog structured, kos tawm FAT Filesystems los ntawm Andries E. Brouwer.