, , . , , , .
. (sector), . (track) /. () . .
() , , (cylinder). .
, . ( ) . DOS 512 . BIOS 128, 256, 512 1024 . , (, DOS), . 512 .
, . , [c-h-s], ( , cylinder), h ( , head), a s . 0..-1, . h 0..-1, . s 1..S, S . , [1-0-2] 2 0 ( ) 1.
(partition), , .
, .
, . - .
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primary ( ) extended (). primary- . primary-. tended-, , , (logical).
primary- , , , - , . , [c-h-s].
[0-0-1] (master boot record, MBR), (non-system bootstrap NSB), (partition table, PT). , , 0:7C00h, , . , () boot record, , a master boot record.
MBR , BIOS. MBR :
1) (non-system bootstrap). BIOS MBR. , , 512 , , , , , ;
2) (partition table). MBR 0x1BE 64 ;
3) MBR. MBR AA55h. BIOS , . . , , .
(partition table) , . , . , ( , ), , , .
partition table 16 . boot indicator (0 , 128 (80) ). , . , . , , . System ID ( ), . . 3.1 .
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, . .
3.2
MBR (. 3.1). MBR, partition table, BIOS. , .
MS-DOS , . . () . .
DOS - .
DOS MBR (secondary MBR, SMBR), partition table (LDT, logical disk table), . LDT , , SMBR. , DOS , SMBR, . ( ) .
, partition table, , , LDT, FDISK ( form disk), , . FDISK MS-DOS primary- extended, , , . . , , FDISK OS/2 primary-, , , . , (, - ). (boot-),
, , , , , Disk editor . Disk editor, , , , DOS. 8 . , , . ( FAT, FAT32, NTFS). Win32API, . Partition Magic Power Quest.