HTFS la gi 3

Tags: Windows NT, thiet bi luu tru, luu tru du lieu, he dieu hanh, he thong, thong tin, dinh dang, quan ly, ky thuat, co the, DOS, NTFS, co, file, FAT


Cam on rat nhieu ve cac cau tra loi cua cac ban. Minh xin hoi them la minh co nghe noi tren he dieu hanh WinXP khong ton tai moi truong Dos thuc su, chi co moi truong Dos ao ma thoi. Vay thi tai sao mot tac vu quan trong nhu convert FAT sang NTFS lai dung lenh Dos ma khong la mot lenh nao do cua WinXP. Ngoai ra, co phai ben canh NTFS con co HTFS phai khong. Neu co thi HTFS la gi, co khac biet gi so voi NTFS? Con neu khong thi co bao nhieu kieu file system ngoai FAT16, FAT32 va NTFS. Xin chan thanh cam on.

Huynh Anh Tuan

Hoi am:

- Lenh convert.exe de chuyen he file tu FAT sang NTFS khong phai la lenh DOS (khong the chay duoi DOS 16bit duoc) ma la lenh console win32 (khong dung giao dien cua so nhung dung cac API cua he dieu hanh 32bit)
- HPFS (high performance file system) la he file cua OS/2, khong duoc microsoft ho tro nua
- Ngoai FAT, NTFS, HPFS con nhieu he file cua cac he dieu hanh khac nhu ext2, Linux swap, v.v...

Worm

Dieu dau tien, khong biet ban co nham HPFS sang HTFS hay khong? Minh nghi dung ra la HPFS. Noi ve file system (hay con goi la he thong luu tru), co nhieu loai khac nhau. Moi he dieu hanh thuong co "file system" rieng cua no. Tuc la cach luu tru cac tap tin tren cac thiet bi luu tru thong tin (nhu la o cung). Cho nen ke ten tat ca cac loai "File System" thi cung kho noi het duoc. Vi du nhu DOS dung FAT, Windows 9x dung FAT32, OS/2 dung HPFS, Linux va Unix cung dung "File system" rieng cua no, roi Mac OS nua... Nhung thac mac cua ban ve "File System" da duoc nhac den trong nhieu sach vi tinh. Noi chung, moi thiet bi luu tru du lieu thong tin (dia mem, dia cung ...) phai duoc dinh dang voi mot he thong luu tru thong tin (File System) nao do truoc khi no duoc su dung boi mot he dieu hanh, tien trinh nay duoc goi la "FORMAT". Neu khong duoc dinh dang truoc thi he dieu hanh (OS) khong the nao biet cach luu tru thong tin tren thiet bi luu tru do. Cach dinh dang cua moi "file system" tren mot thiet bi luu tru khac nhau vi tinh nang ky thuat cua no. Cho nen mot he dieu hanh nay chua chac doc duoc tap tin cua mot he dieu hanh khac. Muon doc duoc phai co mot trinh dieu khien (driver) rieng. Sau day la nhung tom tat ve tinh nang ky thuat cua vai he thong luu tru:

- FAT/FAT16 (File Allocate Table: bang dinh vi luu tru) duoc dung voi DOS va mot so he dieu hanh khac vi tinh don gian cua no. Co nhung han che ky thuat nhu: ten luu tru theo he 8.3, khong the quan ly luu luong thong tin qua 2GB cho moi phan vung (partition), kho phuc hoi duoc data mot khi may bi tat dot ngot.

- VFAT: la nang cap cua FAT. Duoc su dung trong W95 va ca trong Windows NT 3.5x. Co nhung cai tien so voi FAT nhu la ten tap co the dai den 255 ky tu chu khong bi gioi han 8.3 nhu FAT, quan ly duoc luu luong thong tin den 2GB moi phan vung.

- FAT32: la mot cai tien tu FAT. Dung 32 bits (4 bytes) dia chi nen co the quan ly duoc mot luong lon du lieu hon (2 terrabytes). Hieu qua hon FAT trong cach luu tru du lieu va tiet kiem dung luong.

- HPFS: (High Performance File System: He thong luu tru cao hoat) Dau tien dung trong OS/2, mot he dieu hanh do IBM va Microsoft hop tac. Dua tren FAT/VFAT nhung co them dac tinh ve an ninh (security) va muc tin cay cao hon. Thich hop cho nhung may chu. MS chi xu dung HPFS cho den windows NT 3.5x, sau do da doi sang NTFS vi van de canh tranh giua MS Windows NT 3.5x va IBM OS/2. HPFS tro nen kem hieu qua khi phan vung du lieu lon hon 400MB.

- NTFS: (New Technology File System: He luu tru ky thuat moi). Day la mot san pham cua Microsoft de dung trong cac van ban Windows NT. NTFS co nhieu uu diem noi bat nhu muc do tin cay cao, dung luong (2^64 bytes = 16exabyte), phan biet chu hoa trong ten tap... Ngoai ra NTFS con biet tu phuc hoi hay sua chua nhung mat mat ve du lieu trong luc luu tru. Tinh nang cua NTFS hon han HPFS ve moi mat.

- "Tai sao mot tac vu quan trong nhu convert FAT sang NTFS lai dung lenh Dos?": Chi co nhung ban Windows NT cu (truoc 4.0) thi van dua vao DOS luc cai dat, cho nen no can mot giai doan phu la doi FAT qua NTFS. Nhung tu Windows 2000, NTFS tro thanh he thong luu tru chinh, khong phu thuoc vao FAT nua. Nhung lenh trong "text mode" ma ban thay chua chac da la DOS (vi DOS hoat dong chu yeu trong "Text mode"). DOS chi la mot chuong trinh rieng biet trong Windows 2000 va XP chu khong con la "he dieu hanh" nua cho nen ho goi la ao. O nhung ban windows truoc do, he dieu hanh phai dung DOS de tai (load) trinh Windows, nhung tu Win 2000, he thong luu tru da co the van hanh ma khong can DOS. Noi tom lai mot cach de hieu, he thong luu tru du lieu la cach mot he dieu hanh luu tru du lieu. Giong nhu mot thu vien luu giu nhung quyen sach (du lieu) vao nhung ngan, hoc (thiet bi luu tru du lieu: dia cung, dia mem...). Moi nguoi quan ly thu vien (he dieu hanh) co cach rieng de luu tru nhung quyen sach cua minh (File System) de khi ma nguoi xu dung yeu cau mot quyen sach (truy cap du lieu), thu vien co the cung cap chinh xac thong tin nguoi xu dung yeu cau.

Hoang

Ban nham lan giua lenh giong kieu DOS va DOS. Trong Windows NT noi chung, co kha nhieu lenh giong trong DOS nhung ban chat lai hoan toan khac. Tuong tu, neu ban dung cac may tinh su dung he dieu hanh Mac hay Linux, ban cung se thay cac cua so, tuy nhien dieu nay khong co nghia cac he dieu hanh do cung la Windows. So di ton tai cac lenh kieu DOS nhu vay la de tao cho nguoi quan tri may co them nhung cach khac (mang tinh quan ly cao hon) de lam viec voi va he thong. Cu phap cua cac lenh duoc lam giong DOS (tuy nhien khong hoan toan giong) de giup nguoi da quen voi DOS hieu va nho nhanh hon. Cung can noi them, cac he dieu hanh nhu Linux, Unix v.v. cung co cac lenh giong kieu DOS, nhung hoan toan khac DOS ve ban chat. Co rat nhieu dinh dang dia khac nhau, tuy theo he dieu hanh ban dung. Dinh dang FAT va NTFS chi ton tai trong cac he dieu hanh cua Microsoft thoi. Cac he dieu hanh khac nhu Linix, Unix, Mac, BeOS, Solaris v.v. co cac dinh dang khac. Du la dinh dang ten la gi va kieu gi thi cung chi co mot muc dich chung la quan ly va cho phep he dieu hanh lam viec voi o dia. Tuy nhien, minh chua bao gio nghe den dinh dang dia nao co ten la HTFS ca.

Dong Ngo

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Tìm hiểu: Windows NT, thiet bi luu tru, luu tru du lieu, he dieu hanh, he thong, thong tin, dinh dang, quan ly, ky thuat, co the, DOS, NTFS, co, file, FAT

Xem Bản Tiếng Việt Có Dấu: HTFS là gì? (3)

Ban co the doc ban tieng Viet co dau cua bai viet HTFS là gì? (3) bang cach nhan chuot vao duong dan tren.

Lien he ve tin HTFS la gi 3

Nhan xet, hay lien he ve tin HTFS la gi 3 co the gui bang duong dan o duoi. Ban nen gui kem tieu de bai viet HTFS la gi 3 de lam tham khao. Bai viet nay thuoc chuyen de Kinh nghiem trong chuyen muc Cong nghe.

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