What is the minimum disk controller requirement for VMware vSAN?

The minimum disk controller requirement for VMware vSAN is a disk controller operating in pass-through or RAID 0 mode. This is because vSAN requires direct access to the disk devices to optimize performance and ensure efficient data management. In pass-through mode, the operating system can directly access the storage device, allowing vSAN to leverage features like local caching and optimized I/O paths.

Using RAID 0 offers striping but does not provide redundancy, which is acceptable in the context of vSAN because the solution is designed to handle data replication and redundancy at the software level, thus allowing for optimal performance without relying solely on hardware-based redundancy mechanisms. Therefore, it's imperative for the storage devices to allow for direct, unencumbered access to fully harness the capabilities of vSAN. This is particularly important given that vSAN is a hyper-converged infrastructure solution that integrates storage and compute resources to provide flexibility and efficiency.