A Field Replaceable Unit (FRU) is a modular component of a system that can be quickly and easily replaced on-site by technicians or qualified personnel, minimizing downtime and avoiding the need to ship equipment to a service center. FRUs are designed for swift interchangeability, often involving plug-and-play or hot-swappable features, which allow replacements without shutting down the entire system. In VDURA systems, common FRUs include hard drives, power supplies, and memory modules, all selected and engineered for efficient maintenance in demanding environments like data centers and high-performance computing (HPC) applications. This approach to hardware management enhances reliability, reduces operational disruptions, and supports business continuity by ensuring critical parts can be updated or replaced seamlessly.