MBR

MBR – Master Boot Record. MBR is located in the first sector of disk.
MBR –?主引導(dǎo)記錄。MBR位于磁盤(pán)的第一個(gè)扇區(qū)

Flash cards can have no MBR. And there is a Boot sector.
閃存卡可以沒(méi)有MBR。但有一個(gè)引導(dǎo)扇區(qū)。

(For example, flash cards formatted with Windows Vista tools)
（例如，使用Windows Vista工具格式化的閃存卡）

MBR contains information about partitions of drive. It can be up to 4 records about partitions of drive. But usually flash cards use only one partition.
MBR包含有關(guān)驅(qū)動(dòng)器分區(qū)的信息。驅(qū)動(dòng)器分區(qū)最多可以有4條記錄。但通常閃存卡只能使用一個(gè)分區(qū)。

At the end of the boot sector is a 2-byte structure called a signature word or end of sector marker, which is always set to?55 AA.
在引導(dǎo)扇區(qū)的末尾是的2字節(jié)，稱(chēng)為簽名字或扇區(qū)標(biāo)記的末尾，始終設(shè)置為55AA。

Description of MBR:
MBR說(shuō)明

  shift   size   Description
 446-461   16  - partition record 1
 462-477   16  - partition record 2
 478-493   16  - partition record 3
 494-509   16  - partition record 4
 510-511   2   - signature 55àà

Flag?標(biāo)志
Flag of boot partition?引導(dǎo)分區(qū)的標(biāo)志
80 – boot?啟動(dòng)
00 – no?無(wú)

Type?類(lèi)型
Type of partition?分區(qū)類(lèi)型
FAT16 – 04, 06, 0E
FAT32 – 0B, 0C
NTFS – 07
Extended partition 擴(kuò)展分區(qū)- 0f
Extended DOS partition 擴(kuò)展DOS分區(qū) – 05

Start ?開(kāi)始
Initial address of partition in LBA 分區(qū)的起始LBA地址
Counting from the current partition table?從當(dāng)前分區(qū)表計(jì)算

Size?大小
The number of sectors of partition
分區(qū)扇區(qū)數(shù)

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