2 Replies Latest reply on Jan 19, 2016 5:20 PM by ganboing

    Samsung 950 PRO performance on NUC6i5SYH + Linux

    yuvadm

      Just installed a new NUC6i5SYH with an M.2 Samsung 950 PRO NVMe drive. The NUC is running a clean Arch Linux installation.

       

      Out of the box, this is the performance I'm getting from the drive:

       

      $ sudo hdparm -tT --direct /dev/nvme0n1

       

      /dev/nvme0n1:

      Timing O_DIRECT cached reads:   1998 MB in  2.00 seconds = 999.31 MB/sec

      Timing O_DIRECT disk reads: 3234 MB in  3.00 seconds = 1077.58 MB/sec

       

      Seems to be half the expected read performance. What am I missing?