MicroSoft, .Net, 2005, J#  GetDiskGeometry

import System.*;
import System.Runtime.InteropServices.*;
 
public class Test
{
 	private static final int IOCTL_DISK_GET_DRIVE_GEOMETRY = 0x0070000;
	private static final int INVALID_HANDLE_VALUE = -1;
 
 
	private class DISK_GEOMETRY
	{
		public long Cylinders;
		public int MediaType;
		public int TracksPerCylinder;
		public int SectorsPerTrack;
		public int BytesPerSector;
	}
 
	public Test()
	{
 
	}
 
	public DISK_GEOMETRY getDriveGeometry(DISK_GEOMETRY pdg)
	{
		int hDevice;
		boolean bResult;
		int[] junk = new int[0];
		com.ms.win32.OVERLAPPED lpOverlapped = null;
		com.ms.win32.SECURITY_ATTRIBUTES lpSecurity = null;
 
		hDevice = com.ms.win32.Kernel32.CreateFile("\\\\.\\PhysicalDrive0", com.ms.win32.wing.GENERIC_READ, com.ms.win32.winf.FILE_SHARE_READ, lpSecurity, com.ms.win32.wino.OPEN_EXISTING, 0, 0);
 
 
		if (hDevice == INVALID_HANDLE_VALUE) 
		{
			return null;
		}
 
		bResult = com.ms.win32.Kernel32.DeviceIoControl(hDevice, IOCTL_DISK_GET_DRIVE_GEOMETRY, null, 0, pdg, 192, junk, lpOverlapped);
 
		com.ms.win32.Kernel32.CloseHandle(hDevice);
 
		return pdg;
	}
 
	public void getDriveGeometryStart()
	{
		DISK_GEOMETRY pdg = new DISK_GEOMETRY();
		boolean bResult;
		long DiskSize;
 
		pdg = getDriveGeometry(pdg);
 
		if (pdg != null) {
			System.out.println("Cylinders = " + pdg.Cylinders);
			System.out.println("Tracks per cylinder = " + (long)pdg.TracksPerCylinder);
			System.out.println("Sectors per track = "+ (long)pdg.SectorsPerTrack);
			System.out.println("Bytes per sector = " + (long)pdg.BytesPerSector);
 
			DiskSize = pdg.Cylinders * (long)pdg.TracksPerCylinder * (long)pdg.SectorsPerTrack * (long)pdg.BytesPerSector;
 
			System.out.println("Disk size = %I64d (Bytes) = " + DiskSize + " " + DiskSize / (1024 * 1024));
		} else {
			System.out.println("Attempt to get drive geometry failed.");
		} 
 
 
	}
 
}
 
	public static void main(String[] args)
	{
                System.out.println("Starting...");
		try{
 
			Test test = new Test();
			test.getDriveGeometryStart();
		}
		catch (Exception e)
		{
			e.printStackTrace();
		}
 
		System.out.println("Complete!");
	}
}