On Tue, Aug 31, 2010 at 2:42 PM, Evgeniy Sudyr <eject.in...@gmail.com>wrote:
> Why controller's cache matters if current write speed is 0.5 Mb/sec ? > In windows (prior installation OBSD) I noted ~ 80 MB/sec write speed > on same configuration. > > My current test (after deleting array and installing on single SATA disk): > > # dd if=/dev/zero of=/tmp/test bs=1 count=10000000 > 10000000+0 records in > 10000000+0 records out > 10000000 bytes transferred in 17.020 secs (587515 bytes/sec) > 500KB/s is pretty good with bs=1. on my own (rather old) machine I get 64KB/s with bs=1. but if you don't use an insanely small block size performance goes way up. with bs=64k that same machine jumps from 64KB/s to 5.5MB/s. -ken
