File Allocation Table (FAT) yog cov ntaub ntawv tsim los ntawm Microsoft hauv 1977 thiab tseem siv niaj hnub no raws li cov ntaub ntawv nyiam tshaj plaws rau cov ntaub ntawv floppy drive media thiab portable, muaj peev xwm khaws cia zoo li flash drives thiab lwm yam khoom siv hauv lub xeev. zoo li SD phaib.
FAT File System yog dab tsi?
FAT yog thawj cov ntaub ntawv siv nyob rau hauv tag nrho Microsoft cov neeg siv kev khiav hauj lwm los ntawm MS-DOS los ntawm Windows ME. Txawm hais tias FAT tseem yog qhov kev txhawb nqa ntawm Microsoft lub tshuab ua haujlwm tshiab, NTFS yog thawj cov ntaub ntawv siv niaj hnub no.
Cov ntaub ntawv faib cov ntaub ntawv tau pom cov kev nce qib dhau sijhawm, feem ntau yog vim qhov xav tau los txhawb cov hard disk loj dua thiab cov ntaub ntawv loj dua.
Cia dhia mus rau qhov sib txawv ntawm FAT file system.
FAT12 (12-ntsis ntaub ntawv faib cov lus)
thawj zaug siv dav ntawm FAT cov ntaub ntawv kaw lus, FAT12, tau qhia hauv xyoo 1980, nrog rau thawj cov qauv ntawm DOS.
FAT12 yog thawj cov ntaub ntawv kaw lus rau Microsoft kev khiav hauj lwm los ntawm MS-DOS 3.30 tab sis kuj tau siv nyob rau hauv feem ntau lub tshuab mus txog MS-DOS 4.0. Nws tseem yog cov ntaub ntawv kaw lus siv ntawm lub sijhawm floppy disk koj yuav pom hnub no.
Cov ntaub ntawv no txhawb nqa qhov loj me thiab cov ntaub ntawv loj txog li 16 MB siv 4 KB pawg lossis 32 MB siv 8 KB, nrog ntau tus lej ntawm 4, 084 cov ntaub ntawv ntawm ib lub ntim (thaum siv 8KB pawg).
Cov npe cov ntaub ntawv hauv qab FAT12 tsis tuaj yeem tshaj qhov txwv siab tshaj plaws ntawm 8 tus cim, ntxiv rau peb qhov txuas ntxiv.
Ib tus lej ntawm cov ntaub ntawv tus cwj pwm tau xub qhia hauv FAT12, suav nrog zais, nyeem nkaus xwb, kab ke, thiab ntim daim ntawv lo.
FAT8, tau tshaj tawm hauv xyoo 1977, yog thawj qhov tseeb ntawm FAT cov ntaub ntawv kaw lus tab sis tau txwv siv tsuas yog ntawm qee lub tshuab computer-style lub sijhawm.
FAT16 (16-ntsis ntaub ntawv faib cov lus)
Kev siv thib ob ntawm FAT yog FAT16, thawj zaug pib xyoo 1984 hauv PC DOS 3.0 thiab MS-DOS 3.0.
Ib qho kev txhim kho me ntsis ntawm FAT16, hu ua FAT16B, yog thawj cov ntaub ntawv kaw lus rau MS-DOS 4.0 nce mus txog MS-DOS 6.22. Pib nrog MS-DOS 7.0 thiab Windows 95, ib qho kev txhim kho ntxiv, hu ua FAT16X, tau siv los hloov.
Raws li qhov kev khiav hauj lwm thiab cov pawg loj siv, qhov siab tshaj plaws tsav loj ntawm FAT16-formatted tsav tuaj yeem yog li ntawm 2 GB txog 16 GB, tom kawg nkaus xwb hauv Windows NT 4 nrog 256 KB pawg.
Cov ntaub ntawv ntau thiab tsawg ntawm FAT16 drives max tawm ntawm 4 GB nrog Loj Cov Ntaub Ntawv Txhawb, lossis 2 GB yam tsis muaj nws.
Cov ntaub ntawv ntau tshaj plaws uas tuaj yeem tuav tau ntawm FAT16 ntim yog 65, 536. Ib yam li nrog FAT12, cov npe cov ntaub ntawv raug txwv rau 8 + 3 cim tab sis tau txuas ntxiv mus rau 255 cim pib nrog Windows 95.
Cov ntaub ntawv khaws cia tau qhia hauv FAT16.
FAT32 (32-ntsis Cov Ntaub Ntawv Sib Koom Tes)
FAT32 yog qhov tseeb version ntawm FAT cov ntaub ntawv kaw lus. Nws tau tshaj tawm xyoo 1996 rau Windows 95 OSR2 / MS-DOS 7.1 cov neeg siv thiab yog thawj cov ntaub ntawv kaw lus rau cov neeg siv khoom siv Windows los ntawm Windows ME.
Nws txhawb nqa cov tsav yooj yim txog li 2 TB lossis txawm tias siab li 16 TB nrog 64 KB pawg.
Zoo nrog FAT16, tsav cov ntaub ntawv ntau thiab tsawg tawm ntawm 4 GB nrog Cov Ntaub Ntawv Loj tau qhib lossis 2 GB yam tsis muaj nws. Ib qho kev hloov kho ntawm cov ntaub ntawv no, hu ua FAT32+, txhawb nqa cov ntaub ntawv ze rau 256 GB loj!
Txog 268, 173, 300 cov ntaub ntawv tuaj yeem muaj nyob ntawm FAT32 ntim, tsuav yog nws siv 32 KB pawg.
exFAT (Extended File Allocation Table)
exFAT, thawj zaug qhia hauv 2006, tseem yog lwm cov ntaub ntawv tsim los ntawm Microsoft, txawm hais tias nws tsis yog "tom ntej" FAT version tom qab FAT32.
Qhov no feem ntau yog npaj los siv rau hauv cov khoom siv xov xwm portable xws li flash drives, SDHC thiab SDXC phaib, thiab lwm yam. exFAT tau txhawb nqa cov khoom siv xov xwm portable txog li 512 TiB loj tab sis theoretically tuaj yeem txhawb nqa drives loj li 64. ZiB, uas yog qhov loj dua li cov xov xwm muaj nyob hauv qhov kev sau no.
Kev them nyiaj yug rau 255 tus cim npe thiab kev txhawb nqa txog li 2, 796, 202 cov ntaub ntawv hauv ib phau ntawv yog ob qhov tseem ceeb ntawm exFAT system.
Cov ntaub ntawv exFAT tau txais kev txhawb nqa los ntawm yuav luag txhua lub Windows (cov laus dua nrog kev xaiv hloov tshiab), Mac OS X (10.6.5+), nrog rau ntau lub TV, xov xwm, thiab lwm yam khoom siv.
Txiv cov ntaub ntawv los ntawm NTFS rau FAT Systems
Cov ntaub ntawv encryption, cov ntaub ntawv compression, cov khoom tso cai, disk quotas, thiab cov ntaub ntawv txheeb xyuas muaj nyob rau ntawm NTFS cov ntaub ntawv nkaus xwb- tsis yog FAT. Lwm yam cwj pwm, zoo li cov uas tau hais hauv kev sib tham saum toj no, kuj muaj nyob rau ntawm NTFS.
Muab lawv qhov sib txawv, yog tias koj tso cov ntaub ntawv encrypted los ntawm NTFS ntim rau hauv qhov chaw FAT-formatted, cov ntaub ntawv poob nws cov txheej txheem encryption, txhais tau tias cov ntaub ntawv tuaj yeem siv tau zoo li cov ntaub ntawv ib txwm, tsis yog encrypted. Decrypting ib cov ntaub ntawv nyob rau hauv txoj kev no tsuas yog ua tau rau tus thawj tus neeg siv uas encrypted cov ntaub ntawv, los yog lwm yam neeg siv uas tau tso cai los ntawm tus thawj tswv.
Zoo ib yam li cov ntaub ntawv encrypted, vim FAT tsis txhawb nqa compression, cov ntaub ntawv compressed tau txiav tawm yog tias nws tau theej tawm ntawm NTFS ntim thiab mus rau FAT ntim. Piv txwv li, yog tias koj luam cov ntaub ntawv compressed los ntawm NTFS hard drive mus rau FAT floppy disk, cov ntaub ntawv yuav cia li decompress ua ntej nws yuav raug cawm rau lub floppy vim FAT cov ntaub ntawv kaw lus ntawm qhov chaw tshaj xov xwm tsis muaj peev xwm khaws cov ntaub ntawv compressed..
Kev Nyeem Ntawv Qib Siab ntawm FAT
Thaum nws yog txoj hauv kev dhau qhov kev sib tham FAT yooj yim ntawm no, yog tias koj xav paub ntau ntxiv txog yuav ua li cas FAT12, FAT16, thiab FAT32 formatted drives raug teeb tsa, tshawb xyuas FAT Filesystem los ntawm Andries E. Brouwer.
FAQ
Kuv yuav kho cov ntaub ntawv faib cov ntaub ntawv li cas?
Siv Windows check disk hais kom kho FAT yuam kev. Nkag mus CHKDSK X: /F /R (hloov X nrog daim ntawv tsav) los kho cov tsav.
Lub Rooj Sib Tham Cov Ntaub Ntawv Dab Tsi yog Android siv?
Cov khoom siv niaj hnub Android feem ntau txhawb nqa cov ntaub ntawv exFAT.
