Date: Thu, 25 Jan 2007 22:46:42 -0700 (MST) From: "M. Warner Losh" <imp@bsdimp.com> To: cperciva@freebsd.org Cc: current@freebsd.org Subject: Re: Interesting speed benchmarks Message-ID: <20070125.224642.353412237.imp@bsdimp.com> In-Reply-To: <45B9895B.9020709@freebsd.org> References: <20070125.192448.-432840241.imp@bsdimp.com> <45B9895B.9020709@freebsd.org>
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In message: <45B9895B.9020709@freebsd.org>
Colin Percival <cperciva@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
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