private void testWrite(){
		String f_name = this.path + Params.nTests + ".txt";
		long startTime = 0;
		long endTime = 0;
		
		File f = new File(f_name);
		
		FileOutputStream fout = null;
		
		try{
			
			fout = new FileOutputStream(f);
			
			byte[] buf = new byte[Params.packSize * Params.nPacks];
			
			for(int i = 0 ; i < Params.nTests ; i++){
				startTime = System.nanoTime();
				fout.write(buf);
				endTime = System.nanoTime();
				this.graf.add(endTime - startTime);
			}
			
			fout.close();
			
		}catch(IOException e){
			//TODO: catch error
			e.printStackTrace();
		}
	}