Linux MD RAID Gets Some Improvements For 4.9 Kernel Written by Michael Larabel in Linux Storage on 8 October 2016 at 08:26 AM EDT. 3 Comments The MD subsystem updates were sent out earlier this week for the Linux 4.9 kernel merge window with a few improvements/features to note. The MD RAID code for the Linux 4.9 kernel has some optimized functions making use of AVX512 extensions for RAID6 gen/reco