Tilaa uses local storage based on hardware RAID 10. Each physical host has a hot spare disk.
All hosts are equipped with battery backup so that no data loss occurs if the power supply is disrupted. For that matter, Tilaa also uses a double power supply system for each host. We prefer local storage above a central storage system. This means that the impact would be limited if something were to go wrong with the hardware, and only part of the platform would go offline.