> nd at a maximum rate of 16589.7124 mb/s with blocksize 67108864 (the entire file at once).
> Why, I ask you, is dd that much slower? What is it 'actually' doing with all the processing power available? I really do not get what this thread is about. I thought it was spam with this subject. First of all you should not use dd for performance testing. Use fio with something like this. [global] ioengine=libaio #ioengine=posixaio invalidate=1 ramp_time=30 iodepth=1 runtime=180 time_based direct=1 #filename=/dev/sde filename=/mnt/disk/fio-bench.img [write-4k-seq] stonewall bs=4k rw=write [randwrite-4k-seq] stonewall bs=4k rw=randwrite fsync=1 [randwrite-4k-d32-seq] stonewall bs=4k rw=randwrite iodepth=32 [read-4k-seq] stonewall bs=4k rw=read [randread-4k-seq] stonewall bs=4k rw=randread fsync=1 [randread-4k-d32-seq] stonewall bs=4k rw=randread iodepth=32 [rw-4k-seq] stonewall bs=4k rw=rw [randrw-4k-seq] stonewall bs=4k rw=randrw [randrw-4k-d4-seq] stonewall bs=4k rw=randrw iodepth=4 [write-4096k-seq] stonewall bs=4096k rw=write [write-4096k-d16-seq] stonewall bs=4M rw=write iodepth=16 [randwrite-4096k-seq] stonewall bs=4096k rw=randwrite [read-4096k-seq] stonewall bs=4096k rw=read [read-4096k-d16-seq] stonewall bs=4M rw=read iodepth=16 [randread-4096k-seq] stonewall bs=4096k rw=randread [rw-4096k-seq] stonewall bs=4096k rw=rw [randrw-4096k-seq] stonewall bs=4096k rw=randrw
