Windows NT以上系统异步读写硬盘的方法

今日整理硬盘无意发现刚学windows编程时写的一段代码,用于在windows下异步读写硬盘用的.
可能网上已经有类似的代码了,小弟在发一次,希望别有人用这做坏事.
打开硬盘有两个东西要知道,第一打开的文件名:\\\\.\\PHYSICALDRIVE0, 0代表第一块硬盘,依次1代表第二块硬盘...第二打开硬盘使用的参数OPEN_EXISTING是不可少的,至于为什么查MSDN.
先把代码发上来大家看看,读写速度还可以几秒就1G了,有空改成完成端口不知道会不会快点.
(注意以下代码不要用\\\\.\\PHYSICALDRIVE0试验,会把硬盘时的第一个G内容写成0,后果可想而知)

1
#include
<
Windows.h
>

2

3
VOID CALLBACK MyIOCompletion(DWORD dwErrorCode,

4
DWORD dwNumberOfBytesTransfered,

5
LPOVERLAPPED lpOverlapped

6
);

7

8
BOOL ReadHardDisk(
char
*
disk);

9

10

int
__stdcall WinMain(IN HINSTANCE hInstance, IN HINSTANCE hPrevInstance, IN LPSTR lpCmdLine, IN
int
nShowCmd )

11
{

12

//
ReadHardDisk("\\\\.\\PHYSICALDRIVE0");

13

ReadHardDisk(
"
C:\\a.dat
"
);
//
如果要试试,先建立文件,要不会出错

14

15

16

17

return

0
;

18
}

19

20
VOID CALLBACK MyIOCompletion(DWORD dwErrorCode, DWORD dwNumberOfBytesTransfered, LPOVERLAPPED lpOverlapped )

21
{

22

//
TRACE("write disk succeed.");

23

}

24

25
BOOL ReadHardDisk(
char
*
disk)

26
{

27
HANDLE hHead;

28

29
hHead
=
CreateFile(disk, GENERIC_WRITE, FILE_SHARE_WRITE,

30
NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL);

31

if
(INVALID_HANDLE_VALUE
==
hHead)

32
{

33

return
FALSE;

34
}

35

36
BYTE
*
pbWrite
=

new
BYTE[
1024

*

1024
];
//
1M

37

OVERLAPPED overlap;

38

39

40

for
(
int
i
=

0
; i
<

1024
; i
++
)
//
1024 也就是 1G

41

{

42
overlap.Offset
=
(
1024

*

1024
)
*
i;

43
overlap.OffsetHigh
=

0
;

44
overlap.hEvent
=
NULL;

45
WriteFileEx(hHead, pbWrite,
1024

*

1024
,
&
overlap, MyIOCompletion);

46

while
(WAIT_IO_COMPLETION
!=
SleepEx(
0
, TRUE))
//
在这里可能加点东西做点别的事情

47

{

48
Sleep(
0
);
//
切换下时钟

49

}

50
}

51

52
CloseHandle(hHead);

53
delete pbWrite;

54

55

return
TRUE;

56
}

57