xiRAID represents a cutting-edge RAID solution tailored for the demands of contemporary storage architectures, especially those leveraging NVMe and NVMe-over-Fabrics (NVMe-oF) technologies. This innovative approach eliminates the need for conventional hardware RAID controllers, opting instead for a software-centric model that not only enhances performance but also reduces overall ownership costs and increases operational flexibility. It accommodates both locally connected drives and networked NVMe devices, functioning as a cohesive block device accessible to applications without requiring any changes. Designed to reach performance levels close to hardware capabilities, xiRAID employs sophisticated methods such as I/O parallelization and a lockless datapath, achieving impressive throughput rates of up to 150 GB/s, handling up to 30 million IOPS, and maintaining latency under 0.5 ms, all while utilizing minimal CPU and memory resources. Supporting a diverse variety of RAID configurations, including levels 0, 1, 5, 6, 10, 50, 60, and 70, it integrates seamlessly with existing file systems through compatibility with POSIX APIs. Ultimately, xiRAID stands out as a versatile and efficient solution, poised to meet the evolving needs of data-intensive applications.