A challenging task when designing a video server is to support the performance criteria of its target application, i.e., both its desired number of simultaneous displays and the waiting tolerance of a display. With a multi-disk video server, the placement of data has a significant impact on the overall performance of a system. This study quantifies the tradeoffs associated with alternative organization of data across multiple disks. We describe a planner that configures a system to: (1) support the performance criteria of an application, and (2) minimize the cost of a system. The experimental results demonstrate the superiority and flexibility of using the planner to configure a system.