//www.delphitop.com 提醒 win7 下必须是管理员权限才能正常获取

function GetIdeSerialNumber: AnsiString; stdcall;
const
IDENTIFY_BUFFER_SIZE = 512;
type
TIDERegs = packed record
bFeaturesReg: Byte; // Used for specifying SMART "commands".
bSectorCountReg: Byte; // IDE sector count register
bSectorNumberReg: Byte; // IDE sector number register
bCylLowReg: Byte; // IDE low order cylinder value
bCylHighReg: Byte; // IDE high order cylinder value
bDriveHeadReg: Byte; // IDE drive/head register
bCommandReg: Byte; // Actual IDE command.
bReserved: Byte; // reserved for future use. Must be zero.
end;

TSendCmdInParams = packed record
// Buffer size in bytes
cBufferSize: DWORD;
// Structure with drive register values.
irDriveRegs: TIDERegs;
// Physical drive number to send command to (0,1,2,3).
bDriveNumber: Byte;
bReserved: array [0 .. 2] of Byte;
dwReserved: array [0 .. 3] of DWORD;
bBuffer: array [0 .. 0] of Byte; // Input buffer.
end;

TIdSector = packed record
wGenConfig: word;
wNumCyls: word;
wReserved: word;
wNumHeads: word;
wBytesPerTrack: word;
wBytesPerSector: word;
wSectorsPerTrack: word;
wVendorUnique: array [0 .. 2] of word;
sSerialNumber: array [0 .. 19] of ansiCHAR;
wBufferType: word;
wBufferSize: word;
wECCSize: word;
sFirmwareRev: array [0 .. 7] of ansiCHAR;
sModelNumber: array [0 .. 39] of ansiCHAR;
wMoreVendorUnique: word;
wDoubleWordIO: word;
wCapabilities: word;
wReserved1: word;
wPIOTiming: word;
wDMATiming: word;
wBS: word;
wNumCurrentCyls: word;
wNumCurrentHeads: word;
wNumCurrentSectorsPerTrack: word;
ulCurrentSectorCapacity: DWORD;
wMultSectorStuff: word;
ulTotalAddressableSectors: DWORD;
wSingleWordDMA: word;
wMultiWordDMA: word;
bReserved: array [0 .. 127] of Byte;
end;

PIdSector = ^TIdSector;

TDriverStatus = packed record
// 驱动器返回的错误代码，无错则返回0
bDriverError: Byte;
// IDE出错寄存器的内容，只有当bDriverError 为 SMART_IDE_ERROR 时有效
bIDEStatus: Byte;
bReserved: array [0 .. 1] of Byte;
dwReserved: array [0 .. 1] of DWORD;
end;

TSendCmdOutParams = packed record
// bBuffer的大小
cBufferSize: DWORD;
// 驱动器状态
DriverStatus: TDriverStatus;
// 用于保存从驱动器读出的数据的缓冲区，实际长度由cBufferSize决定
bBuffer: array [0 .. 0] of Byte;
end;
var
hDevice: THandle;
cbBytesReturned: DWORD;
SCIP: TSendCmdInParams;
aIdOutCmd: array [0 .. (SizeOf(TSendCmdOutParams) + IDENTIFY_BUFFER_SIZE - 1)
- 1] of Byte;
IdOutCmd: TSendCmdOutParams absolute aIdOutCmd;

procedure ChangeByteOrder(var Data; Size: Integer);
var
ptr: PansiChar;
i: Integer;
c: ansiCHAR;
begin
ptr := @Data;

for i := 0 to (Size shr 1) - 1 do
begin
c := ptr^;
ptr^ := (ptr + 1)^;
(ptr + 1)^ := c;
Inc(ptr, 2);
end;
end;

begin
Result := ''; // 如果出错则返回空串

if SysUtils.Win32Platform = VER_PLATFORM_WIN32_NT then
// Windows NT, Windows 2000
begin
// 提示! 改变名称可适用于其它驱动器，如第二个驱动器： '\\.\PhysicalDrive1\'
hDevice := CreateFile('\\.\PhysicalDrive0', GENERIC_READ or GENERIC_WRITE,
FILE_SHARE_READ or FILE_SHARE_WRITE, nil, OPEN_EXISTING, 0, 0);
end
else // Version Windows 95 OSR2, Windows 98
hDevice := CreateFile('\\.\SMARTVSD', 0, 0, nil, CREATE_NEW, 0, 0);

if hDevice = INVALID_HANDLE_VALUE then
Exit;

try
FillChar(SCIP, SizeOf(TSendCmdInParams) - 1, #0);
FillChar(aIdOutCmd, SizeOf(aIdOutCmd), #0);
cbBytesReturned := 0;

// Set up data structures for IDENTIFY command.
with SCIP do
begin
cBufferSize := IDENTIFY_BUFFER_SIZE;

// bDriveNumber := 0;
with irDriveRegs do
begin
bSectorCountReg := 1;
bSectorNumberReg := 1;

// if Win32Platform=VER_PLATFORM_WIN32_NT then bDriveHeadReg := $A0
// else bDriveHeadReg := $A0 or ((bDriveNum and 1) shl 4);
bDriveHeadReg := $A0;
bCommandReg := $EC;
end;
end;

if not DeviceIoControl(hDevice, $0007C088, @SCIP, SizeOf(TSendCmdInParams) -
1, @aIdOutCmd, SizeOf(aIdOutCmd), cbBytesReturned, nil) then
Exit;
finally
CloseHandle(hDevice);
end;

with PIdSector(@IdOutCmd.bBuffer)^ do
begin
ChangeByteOrder(sSerialNumber, SizeOf(sSerialNumber));
(PansiChar(@sSerialNumber) + SizeOf(sSerialNumber))^ := #0;

Result := trim(StrPas(PansiChar(@sSerialNumber)));

end;
end;