FAT32 DBR结构

FAT32 DBR结构

 

typedef struct _FAT32_DBR { BYTE Jmp[3]; //JMP instruction BYTE OEM[8]; //OEM INT16 Bytes_Per_Sector; INT16 Sectors_Per_Cluster; INT16 Reserved_Sectors; BYTE FAT_Count; //Number of FATs INT16 Boot_Entries; //Boot entries (unused) INT16 Sectors_Small; //Sectors (<32MB, do not use for FAT32) BYTE Media; //Media descriptor (always is F8) INT16 Sectors_Per_FAT_Small; //do not use for FAT32 INT16 Sectors_Per_Track; INT16 Heads; //磁头数 INT32 Sectors_Hidden; //0 ~ DBR INT32 Sectors; //Sectors (on large volumes) INT32 Sectors_Per_FAT; INT16 Flags; INT16 Version; INT32 Root_Dir_1st_Cluster; INT16 FSInfo_Sector; //DBR占用扇区数 INT16 Backup_Boot_Sector; //备份所在扇区 BYTE Reserved[12]; BYTE BIOS_Driver; BYTE Unused; BYTE Extend_Boot_Signature; //扩展引导标志 (0x29) INT32 Volume_SN; //Volume serial number BYTE Volume_Label[11]; BYTE File_System[8]; //FAT32 BYTE Boot_Code[420]; BYTE Signature[2]; //55 AA }Fat32_DBR;