iRobot, the maker of the Roomba robotic vacuum, has filed for a prepackaged Chapter 11 bankruptcy, and the fallout has reached Wall Street. Carlyle Group has lost more than $100 million on a loan to the firm, recovering just 39 million. Carlyle eventually sold the remaining debt at a steep discount to a subsidiary of China based Pickett Robotics, which is now set to acquire iRobot through a court supervised restructuring.Since its 22 debut, iRobot has sold over 50 million units of the Roomba and remains a h ...