On 2018-06-15, Alexandre Ratchov <[email protected]> wrote: > On Fri, Jun 15, 2018 at 09:10:44AM +0200, Maximilian Pichler wrote: >> >> For the raw device (rsd1c): >> $ doas cat /dev/rsd1c | pv -bra -Ss500m | sha1 >> 500MiB [25.5MiB/s] [25.5MiB/s] >> ca17bdb9a657bbcf654a60057861be8fe02df0b1 >> > > I don't understand above commads. If you do: > > $ dd if=/dev/rsd1c of=/dev/null bs=1m > > then hit ^C, the command will display the throughput with 1MB > reads. They should be faster than file reads, as you expect. > >
pv is from ports/sysutils/pv, it displays a progress bar and transfer rate, however it's not useful for speed tests, pv itself can result in slow speeds .. (for example on /dev/zero dd with default options is ~10x the speed of pv).
