Drive SAMSUNG MZVLB512HBJQ-000L2 512GB hdparm -t /dev/nvme0n1 Timing buffered disk reads: 3340 MB in 3.00 seconds = 1113.11 MB/sec Drive Samsung SSD 850 PRO 256GB hdparm -t /dev/sda Timing buffered disk reads: 1578 MB in 3.00 seconds = 525.55 MB/sec