nvme set-feature -f 6 -v 1 /dev/nvme0n1 (feature:0x6 (Volatile Write Cache)) dd if=/dev/zero of=~/testfile bs=10000M count=1 oflag=direct -> 1.4 GB/s dd if=/d

nvme set-feature -f 6 -v 1 /dev/nvme0n1 (feature:0x6 (Volatile Write Cache)) dd if=/dev/zero of=~/testfile bs=10000M count=1 oflag=direct -> 1.4 GB/s dd if=/dev/zero of=~/testfile bs=1000M count=10 oflag=direct -> 3.7 GB/s dd if=/dev/zero of=~/testfile bs=100M count=100 oflag=direct -> 3.7 GB/s dd if=/dev/zero of=~/testfile bs=10M count=1000 oflag=direct -> 4.0 GB/s dd if=/dev/zero of=~/testfile bs=1M count=10000 oflag=direct -> 3.6 GB/s nvme set-feature -f 6 -v 0 /dev/nvme0n1 dd if=/dev/zero of=~/testfile bs=10000M count=1 oflag=direct -> 412 MB/s dd if=/dev/zero of=~/testfile bs=1000M count=10 oflag=direct -> 556 MB/s dd if=/dev/zero of=~/testfile bs=100M count=100 oflag=direct -> 553 MB/s dd if=/dev/zero of=~/testfile bs=10M count=1000 oflag=direct -> 482 MB/s dd if=/dev/zero of=~/testfile bs=1M count=10000 oflag=direct -> 267 MB/s The values I got in my first post were obtained through Ubuntu's "Disks" application which has a benchmarking dialog.