windows NT/2000读写物理,逻辑磁盘扇区

王朝delphi·作者佚名  2006-01-09
窄屏简体版  字體: |||超大  

procedure TForm1.Button1Click(Sender: TObject);

var

hDriveHandle: THandle;

procedure TForm1.Button1Click(Sender: TObject);

const

BytesPerSector = 512;

SectorCount = 1; //读写扇区数

SectorStart = 0; //起始扇区数

drive = '\\.\C:'; //驱动盘

var

str: String;

p: PChar;

i: Cardinal;

begin

hDriveHandle := CreateFile(drive, GENERIC_ALL, FILE_SHARE_READ or FILE_SHARE_WRITE,

nil, OPEN_EXISTING, 0, 0);

if (hDriveHandle <> INVALID_HANDLE_VALUE) then

begin

p := allocmem(SectorCount * ByteSPerSector);//p 必须是新申请的内存或全局变量,不能是局部变量

//定义为局部变量是不能读写磁盘的

FileSeek(hDriveHandle, SectorStart * BytesPerSector, 0); //起始扇区

if FileRead(hDriveHandle, p[0], SectorCount * BytesperSector)<> //读扇区

SectorCount * BytesperSector then

raise Exception.Create('Read Error!');

str :='';

for i := 0 to 512 - 1 do

begin

str := str + Format('%.2x', [integer(p[i])]);

if i mod 16 = 15 then

str := str + #13;

end;

ShowMessage(str);

FileSeek(hDriveHandle, SectorStart * BytesPerSector, 0); //起始扇区

if FileWrite(hDriveHandle, p[0], SectorCount * BytesperSector)<> //写扇区

SectorCount * BytesperSector then

raise Exception.Create('Write Error!');

FreeMem(p, SectorCount * BytesperSector);

Closehandle(hDriveHandle);

end;

end;

procedure TForm1.Button2Click(Sender: TObject);

const

BytesPerSector = 512;

SectorCount = 1; //读写扇区数

SectorStart = 0; //起始扇区数

drive = '\\.\PHYSICALDRIVE0'; //物理磁盘

var

str: String;

p: PChar;

i: Cardinal;

begin

hDriveHandle := CreateFile(drive, GENERIC_ALL, FILE_SHARE_READ or FILE_SHARE_WRITE,

nil, OPEN_EXISTING, 0, 0);

if (hDriveHandle <> INVALID_HANDLE_VALUE) then

begin

p := allocmem(SectorCount * ByteSPerSector);//p 必须是新申请的内存或全局变量,不能是局部变量

//定义为局部变量是不能读写磁盘的

FileSeek(hDriveHandle, SectorStart * BytesPerSector, 0); //起始扇区

if FileRead(hDriveHandle, p[0], SectorCount * BytesperSector)<> //读扇区

SectorCount * BytesperSector then

raise Exception.Create('Read Error!');

str :='';

for i := 0 to 512 - 1 do

begin

str := str + Format('%.2x', [integer(p[i])]);

if i mod 16 = 15 then

str := str + #13;

end;

ShowMessage(str);

FileSeek(hDriveHandle, SectorStart * BytesPerSector, 0); //起始扇区

if FileWrite(hDriveHandle, p[0], SectorCount * BytesperSector)<> //写扇区

SectorCount * BytesperSector then

raise Exception.Create('Write Error!');

FreeMem(p, SectorCount * BytesperSector);

Closehandle(hDriveHandle);

end;

end;

 
 
 
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