Good post by Brian Mitchell (thank you)
One of the most fundamental features of the NetApp E-Series Storage Systems and EF-Series Flash Arrays is the ability to generate, verify, and store RAID parity calculations (e.g. – XOR logic, Galois Field Multiply, etc.). To do so, NetApp leverages a native hardware “engine” that’s part of the Intel Xeon architecture. This engine, named “Crystal Beach 3” Direct Memory Access (DMA), is located within the Xeon CPU of every E5400/5500 and EF540/550 system.
Read on here