The most prominent prior art invalidating this patent is the RAID6 (one of the most commonly used Erasure Code) implementation of the linux kernel. In an article dated 2004 (i.e. ten years before the patent was granted to StreamScale) it is described to be optimized as follows : For additional speed improvements, it is desirable to use any integer vector instruction set that happens to be available on the machine, such as MMX or SSE-2 on x86, AltiVec on PowerPC, etc. Where SSE2 is the acronym of Streaming SIMD Extensions 2. The patent cites Anvin aticle’s but only to state the problem and does not acknowledge it also contains the solution.