On Thu, Sep 06, 2018 at 08:26:55PM +0000, Gruher, Joseph R wrote: > In general, my question is whether this is expected behavior? If a > bug, is it fixed in a newer kernel? We are trying to track some disk > stats and the unexpected (at least from our perspective) behavior in > /proc/diskstats is causing us some confusion. Thanks! With the exception of the 'lsblk' error message, I think all your results are expected when CONFIG_NVME_MUTLIPATH=y.