Ch?t bo lo?i v kch th?c lin cung ph? thu?c vo kch th?c ? ?a logic

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TM T?T

MS-DOS phn b? dung l?ng ?a cho cc t?p tin trong cc n v? c?a m?t ho?c nhi?u l?nh v?c; cc n v? ny ?c g?i l "cc c?m" ho?c "n v? phn b?." Ngy b?t k? MS-DOS ?a, m?t t?p tin 1-byte ?c c?p pht 1 c?m ?a khng gian, l?ng ph cc khng s? d?ng di?n tch c?a c?m. M?t t?p tin l 3,2 c?m l?n ?c cho 4 c?m. Nh?n chung, m?t kch th?c lin cung nh? hn c ngh?a l ch?t th?i t hn.

Kch th?c lin cung cho m?t ? ?a ?c quy?t ?nh b?i FORMAT, ty thu?c vo s? Kch th?c c?a cc h?p l? ? ?a (xem b?ng d?i y). "? ?a logic" ? c?p m?t kh?i l?ng MS-DOS truy c?p b?ng m?t k? t? ? ?a (A:, B:, C:, D:, v nh v?y ra). ?a c?ng ng?i dng c th? xem xt c?m kch c? khi vi?c l?a ch?n lm th? no ? phn vng drive(s) c?a h?.

Kch th?c lin cung c?a m?t ? ?a m?m khng th? thay ?i. Kch th?c lin cung m?t ? ?a c?ng c th? ?c thay ?i ch? b?ng cch thay ?i kch th?c c?a cc ? ?a logic, m ?c th?c hi?n b?i phn ? ?a c?ng.

CHKDSK hi?n th? kch th?c n v? c?p pht cho m?t ? ?a logic. FDISK c?a ty ch?n 4 hi?n th? size(s) ? ?a logic trn drive(s) c?ng.

Lu ?: DoubleSpace nn ? xu?t hi?n ? c cc c?m 8 K, nhng n?i b? thay ?i l?nh v?c cho m?i c?m sao nh c?n thi?t (thng ny tin ?c ghi l?i trong MDFAT). V d?, m?t 10 K t?p tin nn b?i m?t nhn t? c?a 2: 1 th?c s? s? d?ng 5 K, ho?c 10 ngnh, dung l?ng ? ?a.

THNG TIN THM

D?i y l m?t b?ng kch th?c ? ?a logic, ch?t bo (t?p tin phn b? Cc lo?i b?ng), v kch c? c?m:
                  Drive Size      FAT Type     Sectors     Cluster
               (logical volume)              Per Cluster     Size
               ----------------   --------   -----------   -------
(Floppy Disks)      360K           12-bit         2         1K
                    720K           12-bit         2         1K
                   1.2 MB          12-bit         1       512 bytes
                   1.44 MB         12-bit         1       512 bytes
                   2.88 MB         12-bit         2         1K
(Hard Disks)     0 MB - 15 MB      12-bit         8         4K
                16 MB - 127 MB     16-bit         4         2K
               128 MB - 255 MB     16-bit         8         4K
               256 MB - 511 MB     16-bit        16         8K
               512 MB - 1023 MB    16-bit        32        16K
              1024 MB - 2047 MB    16-bit        64        32K
				
GHI CH:
  • L l?nh v?c 512 byte kch th?c, ngo?i tr? trn m?t s? ? ?a RAM.
  • Trong qu kh?, m?t s? OEMs ? s?a ?i cc phin b?n c?a MS-DOS ? h? tr? cc kch th?c ngnh v/ho?c c?m. Microsoft MS-DOS 5 Nng c?p thi?t l?p s?, n?u c th?, chuy?n ?i ? ?a logic ? MS-DOS 5.0 tng thch. i?u ny ?i h?i ph?i chuy?n ?i kch th?c ngnh ? 512 byte trong khi gi? l?i kch th?c chu?n c?m.
  • MS-DOS s? xc ?nh kch th?c FAT d?a trn s? l?ng cc c?m. N?u c cc c?m 4086 ho?c t hn, m?t FAT 12-bit ?c s? d?ng. N?u khng c 4087 ho?c nhi?u hn cc c?m, m?t ch?t bo 16-bit ?c s? d?ng.
? bi?t thm chi ti?t v? ch? ? ny, truy v?n trn cc t? sau y:
c?m sao v ?a v ch?t bo

Thu?c tnh

ID c?a bi: 67321 - L?n xem xt sau cng: 17 Thang Tam 2011 - Xem xt l?i: 2.0
p d?ng
  • Microsoft MS-DOS 4.0 Standard Edition
  • Microsoft MS-DOS 5.0 Standard Edition
  • Microsoft MS-DOS 6.0 Standard Edition
  • Microsoft MS-DOS 6.2 Standard Edition
  • Microsoft MS-DOS 6.21 Standard Edition
  • Microsoft MS-DOS 6.22 Standard Edition
  • Microsoft Windows 95
T? kha:
kbmt KB67321 KbMtvi
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