MBR結構，在資料庫恢復中，若要手工填寫分割槽表的話，只注意四個重要的地方，其它的可隨便填。

#pragma pack(1) //位元組對齊
typedef struct _PARTITION_ENTRY//分割槽表結構
{
    UCHAR active; //狀態（是否被啟用）   重要
    UCHAR StartHead; //分割槽起始磁頭號   
    //UCHAR StartSector; //分割槽起始扇區和柱面號,高2位為柱面號的第 9,10 位, 高位元組為柱面號的低 8 位  
    //UCHAR StartCylinder; // 起始磁碟柱面 
    USHORT StartSecCyli; //與63相位與得出的是開始扇區，把它右移6位就是開始柱面
    UCHAR PartitionType; // 分割槽型別   重要 
    UCHAR EndHead; //分割槽結束磁頭號
    //UCHAR EndSector; //分割槽結束扇區   
    //UCHAR EndCylinder; // 結束柱面號
    USHORT EndSecCyli; //與63相位與得出的就是結束扇區，把它右移6位就是結束柱面
    ULONG StartLBA; // 扇區起始邏輯地址   重要
    ULONG TotalSector; // 分割槽大小      重要
} PARTITION_ENTRY, *PPARTITION_ENTRY;

//引導區512BYTE結構
typedef struct _MBR_SECTOR
{
    UCHAR BootCode[440];//啟動記錄440 Byte
    ULONG DiskSignature;//磁碟簽名
    USHORT NoneDisk;//二個位元組
    PARTITION_ENTRY Partition[4];//分割槽表結構64 Byte
    USHORT Signature;//結束標誌2 Byte 55 AA
} MBR_SECTOR, *PMBR_SECTOR;

#pragma pack()
 

擴充套件分割槽暫時未寫，程式碼基本上copy+理解，主要是學習並理解分割槽表

執行如圖

void _ReadMbrPartiton(CListBox *listbox)
{
    TCHAR   szDevicename[64]={0};
    char *drive = "1";
    MBR_SECTOR _ReadMbr;
    wsprintf(szDevicename,"\\\\.\\PHYSICALDRIVE%c",*drive);
    HANDLE hDevice=CreateFile(szDevicename,
                          GENERIC_READ|GENERIC_WRITE,
                          FILE_SHARE_READ|FILE_SHARE_WRITE,
                          NULL,
                          OPEN_EXISTING,
                          0,
                          NULL);
    if(hDevice == INVALID_HANDLE_VALUE)   
    {   
        //MessageBox("開啟裝置出錯");   
        return;
    }  
    
    memset(&_ReadMbr,0,sizeof(MBR_SECTOR));
    DWORD leng = 512;
    DWORD count;
    DeviceIoControl(hDevice,FSCTL_LOCK_VOLUME,NULL,0,NULL,0,&count,NULL); 
    BOOL bcheck = ReadFile(hDevice,&_ReadMbr,512,&leng,NULL);
    if (bcheck==FALSE || leng<512)
    {
        //MessageBox("讀取MBR出錯！"); 
        DeviceIoControl(hDevice, FSCTL_UNLOCK_VOLUME, NULL, 0, NULL, 0, &count, NULL);
        CloseHandle(hDevice);
        return;
    }
    listbox->ResetContent();//清除
    TCHAR * szTemp = new TCHAR[64];
    //char * Temp = new char[64];
    //for
    for (int i=0;i<4;i++)
    {
        if (_ReadMbr.Partition[i].PartitionType==0)
        {
            continue;
        }
        memset(szTemp,0,64);
        //memset(Temp,0,64);
        if (_ReadMbr.Partition[i].active == 128)
        {
            strcat(szTemp,"Active ");
        } else
        {
            strcat(szTemp,"NotActive ");
        }
        
        if (_ReadMbr.Partition[i].PartitionType==5 || _ReadMbr.Partition[i].PartitionType==15 )
        {
            strcat(szTemp,"Extended ");
        }

        listbox->AddString(szTemp);
        memset(szTemp,0,64);
        wsprintf(szTemp,"80=active partition:%02X",_ReadMbr.Partition[i].active);
        listbox->AddString(szTemp);
        memset(szTemp,0,64);
        wsprintf(szTemp,"Start head:%d",_ReadMbr.Partition[i].StartHead);
        listbox->AddString(szTemp);
        memset(szTemp,0,64);
        int temp = _ReadMbr.Partition[i].StartSecCyli;
        wsprintf(szTemp,"Start sector:%d",temp & 63);
        listbox->AddString(szTemp);
        memset(szTemp,0,64);
        wsprintf(szTemp,"Start cylinder:%d",temp>>6);
        listbox->AddString(szTemp);
        memset(szTemp,0,64);
        wsprintf(szTemp,"Partition type indicator (hex):%02d",_ReadMbr.Partition[i].PartitionType);
        listbox->AddString(szTemp);
        memset(szTemp,0,64);
        wsprintf(szTemp,"End head:%d",_ReadMbr.Partition[i].EndHead);
        listbox->AddString(szTemp);
        memset(szTemp,0,64);
        temp = _ReadMbr.Partition[i].EndSecCyli;
        wsprintf(szTemp,"End sector:%d",temp & 63);
        listbox->AddString(szTemp);
        memset(szTemp,0,64);
        wsprintf(szTemp,"End cylinder:%d",temp>>6);
        listbox->AddString(szTemp);
        memset(szTemp,0,64);
        wsprintf(szTemp,"Sectors preceding partition 1:%d",_ReadMbr.Partition[i].StartLBA);
        listbox->AddString(szTemp);
        memset(szTemp,0,64);
        wsprintf(szTemp,"Sectors in partition 1:%d",_ReadMbr.Partition[i].TotalSector);
        listbox->AddString(szTemp);
        //若是擴充套件分割槽
        if (_ReadMbr.Partition[i].PartitionType=15 || _ReadMbr.Partition[i].PartitionType==5)
        {
            BOOL bcon = TRUE;
            //第一次進來儲存 0扇區到擴充套件分割槽的絕對扇區
            


            while (bcon)
            {
               //未完    
            }
        }
        
        
    }
    //for
    
    DeviceIoControl(hDevice, FSCTL_UNLOCK_VOLUME, NULL, 0, NULL, 0, &count, NULL);
    CloseHandle(hDevice);
    
}