Skip site navigation (1)Skip section navigation (2)
Date:      Mon, 23 Jul 2012 09:41:18 +0200 (CEST)
From:      Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To:        Jakub Lach <jakub_lach@mailplus.pl>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: "da0: 40.000MB/s transfers" What was rationale behind pegging USB 2.0 at 40MB/s?
Message-ID:  <alpine.BSF.2.00.1207230940390.7616@wojtek.tensor.gdynia.pl>
In-Reply-To: <1342992043358-5729028.post@n5.nabble.com>
References:  <1342992043358-5729028.post@n5.nabble.com>

Next in thread | Previous in thread | Raw E-Mail | Index | Archive | Help
> And USB 2.0 hard limit is 60MB/s.
i have never seen USB 2.0 exceeding 35MB/s write and 40MB/s read.

even when connecting SATA disk over USB-SATA bridge.

60MB/s is wire speed. USB have enormous protocol overhead.



Want to link to this message? Use this URL: <http://docs.FreeBSD.org/cgi/mid.cgi?alpine.BSF.2.00.1207230940390.7616>