Maxtor's Tufano Resigns as CEO, President  NEW YORK (Reuters) -  Computer disk drive maker Maxtor  Corp. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=MXO.N target=/stocks/quickinfo/fullquote"&gt;MXO.N&lt;/A&gt; on Monday said Paul Tufano has resigned as chief  executive, president and acting chief financial officer, less  than a month after the company forecast a quarterly loss that  was about double what Wall Street had been expecting.