//Filename : HddSerial.pas

unit HddSerial;

interface

uses Windows, SysUtils;

type
  TDiskInfo = record
    diGenConfig                 : Word;
    diNumCyls                   : Word;
    diReserved                  : Word;
    diNumHeads                  : Word;
    diBytesPerTrack             : Word;
    diBytesPerSector            : Word;
    diSectorsPerTrack           : Word;
    diVendorUnique              : Array[0..2] of Word;
    diSerialNumber              : String;
    diBufferType                : Word;
    diBufferSize                : Word;
    diECCSize                   : Word;
    diFirmwareRev               : String;
    diModelNumber               : String;
    diMoreVendorUnique          : Word;
    diDoubleWordIO              : Word;
    diCapabilities              : Word;
    diReserved1                 : Word;
    diPIOTiming                 : Word;
    diDMATiming                 : Word;
    diBS                        : Word;
    diNumCurrentCyls            : Word;
    diNumCurrentHeads           : Word;
    diNumCurrentSectorsPerTrack : Word;
    dilCurrentSectorCapacity    : DWORD;
    diMultSectorStuff           : Word;
    diTotalAddressableSectors  : DWORD;
    diSingleWordDMA             : Word;
    diMultiWordDMA              : Word;
    diReserved2                 : Array[0..127] of BYTE;
  end;
 
function GetDiskInfo:TDiskInfo;

implementation

function GetDiskInfo:TDiskInfo;
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 CHAR;
    wBufferType                : Word;
    wBufferSize                : Word;
    wECCSize                   : Word;
    sFirmwareRev               : Array[0..7] of Char;
    sModelNumber               : Array[0..39] of Char;
    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
    // Error code from driver, or 0 if no error.
    bDriverError : Byte;
    // Contents of IDE Error register. Only valid when bDriverError is SMART_IDE_ERROR.
    bIDEStatus   : Byte;
    bReserved    : Array[0..1] of Byte;
    dwReserved   : Array[0..1] of DWORD;
  end;
  TSendCmdOutParams = packed record
    // Size of bBuffer in bytes
    cBufferSize  : DWORD;
    // Driver status structure.
    DriverStatus : TDriverStatus;
    // Buffer of arbitrary length in which to store the data read from the drive.
    bBuffer      : Array[0..0] of BYTE;
  end;

  var
    hDevice : THandle;
    cbBytesReturned : DWORD;
    ptr : PChar;
    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 : PChar;
      i : Integer;
      c : Char;
  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 := ''; // return empty string on error
  if SysUtils.Win32Platform=VER_PLATFORM_WIN32_NT then // Windows NT, Windows 2000
    begin
      //warning! change for other drives: ex.: second drive '\\.\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;
        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( sModelNumber, SizeOf(sModelNumber) );
      (PChar(@sModelNumber)+SizeOf(sModelNumber))^ := #0;
      GetDiskInfo.diModelNumber := PChar(@sModelNumber);

      ChangeByteOrder( sSerialNumber, SizeOf(sSerialNumber) );
      (PChar(@sSerialNumber)+SizeOf(sSerialNumber))^ := #0;
      GetDiskInfo.diSerialNumber := PChar(@sSerialNumber);

      ChangeByteOrder( sFirmwareRev, SizeOf(sFirmwareRev) );
      (PChar(@sFirmwareRev)+SizeOf(sFirmwareRev))^ := #0;
      GetDiskInfo.diFirmwareRev := PChar(@sFirmwareRev);

      GetDiskInfo.diGenConfig := wGenConfig;
      GetDiskInfo.diNumCyls := wNumCyls;
      GetDiskInfo.diNumHeads := wNumHeads;
      GetDiskInfo.diBufferSize := wBufferSize;
      GetDiskInfo.diBytesPerSector := wBytesPerSector;
    end;
end;

end.

// Usage

// Create a new form, add HddSerial to "uses"

// Put a TButton on form write click procedure as follow

procedure TForm1.Button1Click(Sender: TObject);
var
  di: TDiskInfo;
  HDDKod: String;
begin
  di := GetDiskInfo;
  HDDKod := Trim(di.diSerialNumber);
  ShowMessage(HDDKod);
end;