Interesting speed benchmarks

[M. Warner Losh]

In message: <45B9895B.9020709 at freebsd.org>
            Colin Percival <cperciva at freebsd.org> writes:
: M. Warner Losh wrote:
: > On a lark, I just got a combo USB/Firewire external disk drive.  I ran
: > some crude benchmarks, and I was surprised by what I found.  This is
: > on a fairly stock -current kernel.
: > 
: > Firewire does around 40MB/s, while USB 2.0 maxes out at about 12MB/s.
: 
: Either amd64 is slower than i386, there has been a performance regression
: between 6.2-RELEASE and whatever version of FreeBSD you're running, or you
: have a rather slow external drive.  I get 25MB/s from my Vantec Nexstar3
: USB 2.0 enclosure:
: 
: http://www.daemonology.net/blog/2006-01-28-vantex-nexstar3.html

Still, 25MB/s is no 40MB/s...

Warner