On Thu, Jun 21, 2018 at 03:08:10PM +0200, Jan Stary wrote:
> On Jun 20 17:32:51, maxim.pich...@gmail.com wrote:
> > dd bs=1 count=1234567 will copy 1234567 bytes and then stop, but it's slow.
>
> $ dd bs=1 count=1234567 < /dev/zero > /dev/null
> 1234567+0 records in
> 1234567+0 records out
> 1234567 bytes transferred in 4.507 secs (273886 bytes/sec)
>
> $ dd count=1 bs=1234567 < /dev/zero > /dev/null
> 1+0 records in
> 1+0 records out
> 1234567 bytes transferred in 0.001 secs (653970943 bytes/sec)
The latter will stop on a short read.
-Otto
