A manufacturer of Digital Video Recorders and related digital security products approached CP Technologies to design and build their next generation security appliance. Difficult design constraints included a depth limit of 21″, four high speed large hot swap raid drives, a vibration isolated fan system to prevent drive errors, high component density, and an obstructed rear panel which limited cooling flow. The customer had rigorous component temperature limits. CP Technologies delivered two different system configurations to satisfy a changing specification. The customer had a short time-to-market window.