I did 7 runs of your test and the average time is: 0.424795s. Example run: $ dd if=/dev/zero of=test bs=512 count=1500 oflag=dsync 1500+0 records in 150

I did 7 runs of your test and the average time is: 0.424795s. Example run: $ dd if=/dev/zero of=test bs=512 count=1500 oflag=dsync 1500+0 records in 1500+0 records out 768000 bytes (768 kB) copied, 0.427272 s, 1.8 MB/s