Unit em Componente

// Extracting IDE(ATA) disk serial number.

// (c) 2000-2003 Alex Konshin 
//               mailto:akonshin@earthlink.net 
//               http://home.earthlink.net/~akonshin/index.htm 
// 
// 30 Jul 2000 created 
// 22 Oct 2003 refactoring

unit HDFunc;

interface 

//------------------------------------------------------------- 
// Tries to extract the serial number from the first IDE disk that is found in the system. 
// Returns an empty string if IDE disk is not found. 
  function GetIdeSN : String; 

//------------------------------------------------------------- 
// Tries to extract the serial number from specified IDE disk. 
// 
// Parameters: 
//   ControllerNumber - SCSI port number of the controller. 
//   DriveNumber - Device index (0..4). 
// 
// Raises OSError exception in case of any error during this operation. 
// 
// Notes: 
//  1. The parameter ControllerNumber is ignored on Windows 9x/ME platforms and should be 0. 
//  2. This function CAN NOT extract SCSI disk serial number. 
// 
  function GetIdeDiskSerialNumber( ControllerNumber, DriveNumber : Integer ) : String; 

//=============================================================

implementation

uses
  Windows,
  SysUtils; // only for Win32Platform, SysErrorMessage and class Exception

{$IFDEF VER150}
{$DEFINE VER140}
{$ENDIF}

{$IFNDEF VER140}
procedure RaiseLastOSError;
begin
  RaiseLastWin32Error;
end;
{$ENDIF}

//-------------------------------------------------------------
// Tries to extract the serial number from specified IDE disk.
//
// Parameters:
//   ControllerNumber - SCSI port number of the controller.
//   DriveNumber - SCSI port number of the controller. 
// Notes: 
//  1. The parameter ControllerNumber is ignored on Windows 9x/ME platforms and should be 0. 
//  2. This function CAN NOT extract SCSI disk serial number. 
// 
function GetIdeDiskSerialNumber( ControllerNumber, DriveNumber : Integer ) : String; 
type 
  TSrbIoControl = packed record 
    HeaderLength : ULONG; 
    Signature    : Array[0..7] of Char; 
    Timeout      : ULONG; 
    ControlCode  : ULONG; 
    ReturnCode   : ULONG; 
    Length       : ULONG; 
  end; 
  SRB_IO_CONTROL = TSrbIoControl; 
  PSrbIoControl = ^TSrbIoControl; 

  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; 
  IDEREGS   = TIDERegs; 
  PIDERegs  = ^TIDERegs; 

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

  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    : ULONG; 
    wMultSectorStuff           : Word; 
    ulTotalAddressableSectors  : ULONG; 
    wSingleWordDMA             : Word; 
    wMultiWordDMA              : Word; 
    bReserved                  : Array[0..127] of Byte; 
  end; 
  PIdSector = ^TIdSector; 

const 
  IDE_ID_FUNCTION = $EC; 
  IDENTIFY_BUFFER_SIZE       = 512; 
  DFP_RECEIVE_DRIVE_DATA        = $0007c088; 
  IOCTL_SCSI_MINIPORT           = $0004d008; 
  IOCTL_SCSI_MINIPORT_IDENTIFY  = $001b0501; 
  DataSize = sizeof(TSendCmdInParams)-1+IDENTIFY_BUFFER_SIZE; 
  BufferSize = SizeOf(SRB_IO_CONTROL)+DataSize; 
  W9xBufferSize = IDENTIFY_BUFFER_SIZE+16; 
var 
  hDevice : THandle; 
  cbBytesReturned : DWORD; 
  s : String; 
  pInData : PSendCmdInParams; 
  pOutData : Pointer; // PSendCmdInParams; 
  Buffer : Array[0..BufferSize-1] of Byte; 
  srbControl : TSrbIoControl absolute Buffer; 

  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 := ´´; 
  FillChar(Buffer,BufferSize,0); 
  if Win32Platform=VER_PLATFORM_WIN32_NT then 
    begin // Windows NT, Windows 2000 
      Str(ControllerNumber,s); 
      // Get SCSI port handle 
      hDevice := CreateFile( 
        PChar(´\\.\Scsi´+s+´:´), 
        GENERIC_READ or GENERIC_WRITE, 
        FILE_SHARE_READ or FILE_SHARE_WRITE, nil, OPEN_EXISTING, 0, 0 ); 
      if hDevice=INVALID_HANDLE_VALUE then RaiseLastOSError; 
      try 
        srbControl.HeaderLength := SizeOf(SRB_IO_CONTROL); 
        System.Move(´SCSIDISK´,srbControl.Signature,8); 
        srbControl.Timeout      := 2; 
        srbControl.Length       := DataSize; 
        srbControl.ControlCode  := IOCTL_SCSI_MINIPORT_IDENTIFY; 
        pInData := PSendCmdInParams(PChar(@Buffer)+SizeOf(SRB_IO_CONTROL)); 
        pOutData := pInData; 
        with pInData^ do 
        begin 
          cBufferSize  := IDENTIFY_BUFFER_SIZE; 
          bDriveNumber := DriveNumber; 
          with irDriveRegs do 
          begin 
            bFeaturesReg     := 0; 
            bSectorCountReg  := 1; 
            bSectorNumberReg := 1; 
            bCylLowReg       := 0; 
            bCylHighReg      := 0; 
            bDriveHeadReg    := $A0 or ((DriveNumber and 1) shl 4); 
            bCommandReg      := IDE_ID_FUNCTION; 
          end; 
        end; 
        if not DeviceIoControl( hDevice, IOCTL_SCSI_MINIPORT, @Buffer, BufferSize, @Buffer, BufferSize, cbBytesReturned, nil ) then RaiseLastOSError; 
      finally 
        CloseHandle(hDevice); 
      end; 
    end 
  else 
    begin // Windows 95 OSR2, Windows 98 
      hDevice := CreateFile( ´\\.\SMARTVSD´, 0, 0, nil, CREATE_NEW, 0, 0 ); 
      if hDevice=INVALID_HANDLE_VALUE then RaiseLastOSError; 
      try 
        pInData := PSendCmdInParams(@Buffer); 
        pOutData := PChar(@pInData^.bBuffer); 
        with pInData^ do 
        begin 
          cBufferSize  := IDENTIFY_BUFFER_SIZE; 
          bDriveNumber := DriveNumber; 
          with irDriveRegs do 
          begin 
            bFeaturesReg     := 0; 
            bSectorCountReg  := 1; 
            bSectorNumberReg := 1; 
            bCylLowReg       := 0; 
            bCylHighReg      := 0; 
            bDriveHeadReg    := $A0 or ((DriveNumber and 1) shl 4); 
            bCommandReg      := IDE_ID_FUNCTION; 
          end; 
        end; 
        if not DeviceIoControl( hDevice, DFP_RECEIVE_DRIVE_DATA, pInData, SizeOf(TSendCmdInParams)-1, pOutData, W9xBufferSize, cbBytesReturned, nil ) then RaiseLastOSError; 
      finally 
        CloseHandle(hDevice); 
      end; 
    end; 

  with PIdSector(PChar(pOutData)+16)^ do 
  begin 
    ChangeByteOrder(sSerialNumber,SizeOf(sSerialNumber)); 
    SetString(Result,sSerialNumber,SizeOf(sSerialNumber)); 
  end; 

  Result := Trim(Result); 

end; 

//------------------------------------------------------------- 
function GetIdeSN : String; 
var 
  iController, iDrive, maxController : Integer;
begin 
  Result := ´´; 
  maxController := 15; 
  if Win32Platform<>VER_PLATFORM_WIN32_NT then maxController := 0; 
  for iController := 0 to maxController do 
  begin 
    for iDrive := 0 to 4 do 
    begin 
      try 
        Result := GetIdeDiskSerialNumber(iController,iDrive); 
        if Result<>´´ then Exit; 
      except 
        // ignore exceptions 
      end; 
    end; 
  end; 
end; 

end.