Samenvatting

TU Delft has started working on its third satellite mission called DelFFi, which is planned for a launch in 2015. In this graduation project spanning 17 weeks, a faulttolerant storage system consisting of three SD cards was designed, implemented and tested for DelFFi that utilizes triple-modular redundancy on a block-level to restore data upon detecting a mismatch. The research and development was performed in the faculty of aerospace engineering of the Delft University of Technology. The storage system will be used to store measurements recorded by the scientific apparatuses on board the
satellites.

Redundancy is achieved by having three replicas of all the data on three different SD cards. The choice for this architecture was clear after an extensive literature study was concluded. As part of the analysis, an estimation revealed that 2-3 errors could occur
every second on the storage system because of space radiation. Without hardware redundancy, the integrity of the stored measurements is jeopardized.

FAT32 was implemented as the file system for storing data on the storage system. To verify the quality of the system, three types of testing were performed: unit testing, performance testing and integration testing. In addition, multiple aspects of the system
were measured to ensure compliance with specifications such as power consumption.