ZwWriteFile函数为啥子会失败呢?
先上代码:
//这是打开逻辑磁盘哈数
HANDLE OpenLogicalDisk(CHAR lpszDiskName, ACCESS_MASK  DesiredAccess)
{
    NTSTATUS ntStatus;
    IO_STATUS_BLOCK iostatus;
    OBJECT_ATTRIBUTES objectAttributes;
    UNICODE_STRING DiskUnicodeString;
    HANDLE hfile;
    ANSI_STRING DiskNameString;

//    _asm int 3
    switch(lpszDiskName)
    {
    case 'C':
    //    RtlInitUnicodeString(&DiskUnicodeString, L"\\??\\PHYSICALDRIVE0");
        RtlInitUnicodeString(&DiskUnicodeString, L"\\??\\C:");
        break;
    case 'D':
        RtlInitUnicodeString(&DiskUnicodeString, L"\\??\\D:");
        break;
    case 'E':
        RtlInitUnicodeString(&DiskUnicodeString, L"\\??\\E:");
        break;
    case 'F':
        RtlInitUnicodeString(&DiskUnicodeString, L"\\??\\F:");
        break;
    case 'G':
        RtlInitUnicodeString(&DiskUnicodeString, L"\\??\\G:");
        break;
    case 'H':
        RtlInitUnicodeString(&DiskUnicodeString, L"\\??\\H:");
        break;
    case 'I':
        RtlInitUnicodeString(&DiskUnicodeString, L"\\??\\I:");
        break;
    }
    
    //初始化objectAttributes
    InitializeObjectAttributes(&objectAttributes,
                             &DiskUnicodeString,
                             OBJ_CASE_INSENSITIVE,//对大小写敏感
                             NULL,
                             NULL);
    //打开文件
//    _asm int 3
    ntStatus = ZwCreateFile(&hfile, 
                           DesiredAccess, 
                            &objectAttributes,
                            &iostatus,
                            NULL,
                            FILE_ATTRIBUTE_NORMAL,
                            FILE_SHARE_READ|FILE_SHARE_WRITE,
                            FILE_OPEN,  //打开文件,如果不存在,则返回错误
                            FILE_SYNCHRONOUS_IO_NONALERT,
                            NULL,
                            0);
    if (NT_SUCCESS(ntStatus))
    {
        KdPrint(("Open file successfully.\n"));
    //    ZwClose(hfile);
       return hfile;
    }
    else
    {
        KdPrint(("Open file failed.\n"));
       return NULL;
    }
  
    return NULL;
}

//这是写入逻辑磁盘函数
BOOL WriteLogicalDiskSector(HANDLE hfile, PIoWriteDiskInBuffer pWriteSectorIn,\
                            PIoWriteDiskOutBuffer pWriteSectorOut)
{
    NTSTATUS ntStatus;
    IO_STATUS_BLOCK iostatus;
    //_asm int 3
    //读取文件
    ntStatus =    ZwWriteFile(hfile,
                      NULL,
                       NULL,
                       NULL,
                       &iostatus,
                       (PVOID)pWriteSectorIn->szWriteDiskBuffer,
                       (ULONG)pWriteSectorIn->readnum*512,
                       (PLARGE_INTEGER)&pWriteSectorIn->secStart,
                       NULL
                       );
// _asm int 3
     KdPrint(("Write offset %d  \n", pWriteSectorIn->secStart));
    KdPrint(("Btyes should be Writed  %d  \n", pWriteSectorIn->readnum*512));
if (NT_SUCCESS(ntStatus))  //写入数据成功
{
     pWriteSectorOut->Retn = TRUE;
     KdPrint(("The program really Write %d bytes \n", iostatus.Information));
     return TRUE;
}
else
{
     pWriteSectorOut->Retn = FALSE;
     KdPrint(("Write Data failed\n"));
     return FALSE;
}
}
//------------------------------------------------------------
下面是数据结构:
//定义IOCTL_WRITESECTOR
typedef struct IoWriteDiskInBuffer
{
    char szDiskName;    //读取的磁盘名
    BYTE readnum;          //读取扇区数
    DWORD secStart;        //扇区起始位置
    DWORD secEnd;          //扇区结束位置
    unsigned char szWriteDiskBuffer[4*512];
}IoWriteDiskInBuffer, *PIoWriteDiskInBuffer;

typedef struct IoWriteSectorOutBuffer
{
    BOOL Retn;        //写入失败或成功
}IoWriteDiskOutBuffer, *PIoWriteDiskOutBuffer;
//-----------------------------------------------------------
最后是结果: 当 secStart = 0; secEnd = 0;的时候能够成功改写数据, 
但是当secStart = 0; secEnd = 512;就写入失败了, secStart = 512; secEnd = 512;还是写入失败,然后我就想不明白了,哪位大牛来指教下吧... 不胜感激

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