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copied!<p>On unix, just </p> <pre><code> dd if=/dev/sr0 bs=512 count=32 </code></pre> <p>or open /dev/sr0 in binary mode from code. On Windows, see this snippet (<a href="http://www.codeguru.com/cpp/w-p/system/misc/article.php/c5765" rel="nofollow">from this page</a>). It supports Win98/2k etc. The sample uses A:, but you can also specify a physical drive for raw reading as <code>"\\\\.\\PhysicalDrive0"</code> or <code>"\\\\.\\PhysicalDrive1"</code> ... etc</p> <pre><code>// All msdos data structures must be packed on a 1 byte boundary #pragma pack (1) struct { DWORD StartingSector ; WORD NumberOfSectors ; DWORD pBuffer; }ControlBlock; #pragma pack () #pragma pack (1) typedef struct _DIOC_REGISTERS { DWORD reg_EBX; DWORD reg_EDX; DWORD reg_ECX; DWORD reg_EAX; DWORD reg_EDI; DWORD reg_ESI; DWORD reg_Flags; } DIOC_REGISTERS ; #pragma pack () char * ReadSectors(int drive, DWORD startinglogicalsector, int numberofsectors) { char* buffer = (char*)malloc (512*numberofsectors); HANDLE hDevice ; DIOC_REGISTERS reg ; BOOL fResult ; DWORD cb ; // Creating handle to vwin32.vxd (win 9x) hDevice = CreateFile ( "\\\\.\\vwin32", 0, 0, NULL, 0, FILE_FLAG_DELETE_ON_CLOSE, NULL ); if ( hDevice == INVALID_HANDLE_VALUE ) { // win NT/2K/XP code HANDLE hDevice; DWORD bytesread; char _devicename[] = "\\\\.\\A:"; _devicename[4] += drive; // Creating a handle to disk drive using CreateFile () function .. hDevice = CreateFile(_devicename, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL); if (hDevice == INVALID_HANDLE_VALUE) return NULL; // Setting the pointer to point to the start of the sector we want to read .. SetFilePointer (hDevice, (startinglogicalsector*512), NULL, FILE_BEGIN); if (!ReadFile (hDevice, buffer, 512*numberofsectors, &bytesread, NULL) ) return NULL; } else { // code for win 95/98 ControlBlock.StartingSector = (DWORD)startinglogicalsector; ControlBlock.NumberOfSectors = (DWORD)numberofsectors ; ControlBlock.pBuffer = (DWORD)buffer ; //----------------------------------------------------------- // SI contains read/write mode flags // SI=0h for read and SI=1h for write // CX must be equal to ffffh for // int 21h's 7305h extention // DS:BX -> base addr of the // control block structure // DL must contain the drive number // (01h=A:, 02h=B: etc) //----------------------------------------------------------- reg.reg_ESI = 0x00 ; reg.reg_ECX = -1 ; reg.reg_EBX = (DWORD)(&ControlBlock); reg.reg_EDX = drive+1; reg.reg_EAX = 0x7305 ; // 6 == VWIN32_DIOC_DOS_DRIVEINFO fResult = DeviceIoControl ( hDevice, 6, &(reg), sizeof (reg), &(reg), sizeof (reg), &cb, 0); if (!fResult || (reg.reg_Flags & 0x0001)) return NULL; } CloseHandle(hDevice); return buffer; } </code></pre>

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