From owner-freebsd-current@FreeBSD.ORG  Sat Feb  5 17:25:43 2011
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id D3994106566B;
	Sat,  5 Feb 2011 17:25:43 +0000 (UTC)
	(envelope-from hselasky@c2i.net)
Received: from swip.net (mailfe01.c2i.net [212.247.154.2])
	by mx1.freebsd.org (Postfix) with ESMTP id 394428FC1C;
	Sat,  5 Feb 2011 17:25:42 +0000 (UTC)
X-Cloudmark-Score: 0.000000 []
X-Cloudmark-Analysis: v=1.1 cv=Vlw5OJcoxCC473z5moizI40ESYe+BpcMN2hU0iQoJwI=
	c=1 sm=1 a=WcA_fa_ncYIA:10 a=8nJEP1OIZ-IA:10 a=CL8lFSKtTFcA:10
	a=i9M/sDlu2rpZ9XS819oYzg==:17 a=M6ovU5MAHaeOcEU1UIoA:9
	a=oSCdbP13-7b4PwlHwkVFOGlCdk4A:4 a=wPNLvfGTeEIA:10
	a=i9M/sDlu2rpZ9XS819oYzg==:117
Received: from [188.126.198.129] (account mc467741@c2i.net HELO
	laptop002.hselasky.homeunix.org)
	by mailfe01.swip.net (CommuniGate Pro SMTP 5.2.19)
	with ESMTPA id 84571532; Sat, 05 Feb 2011 18:25:40 +0100
From: Hans Petter Selasky <hselasky@c2i.net>
To: Julian Elischer <julian@freebsd.org>
Date: Sat, 5 Feb 2011 18:25:39 +0100
User-Agent: KMail/1.13.5 (FreeBSD/8.2-PRERELEASE; KDE/4.4.5; amd64; ; )
References: <AANLkTimJOZ_j40HDt89OXcimz3nc22uhzxrUfWDWsuuR@mail.gmail.com>
	<AANLkTi=ppQSq1c4u8iYL7Tvh9QDG-1z3nWM=677E7=gW@mail.gmail.com>
	<4D4D801A.8050900@freebsd.org>
In-Reply-To: <4D4D801A.8050900@freebsd.org>
X-Face: *nPdTl_}RuAI6^PVpA02T?$%Xa^>@hE0uyUIoiha$pC:9TVgl.Oq, NwSZ4V"|LR.+tj}g5
	%V,x^qOs~mnU3]Gn; cQLv&.N>TrxmSFf+p6(30a/{)KUU!s}w\IhQBj}[g}bj0I3^glmC(
	:AuzV9:.hESm-x4h240C`9=w
MIME-Version: 1.0
Content-Type: Text/Plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Message-Id: <201102051825.39763.hselasky@c2i.net>
Cc: Donald Allen <donaldcallen@gmail.com>, freebsd-current@freebsd.org,
	freebsd-usb@freebsd.org
Subject: Re: Intermittent pauses copying from one usb drive to another
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 05 Feb 2011 17:25:43 -0000


> 
> Hans Petter,
> Could the USB  mass storage layer not refuse to pass down some commands
> and just return the proscribed error?

Yes, that's what I'm thinking would be the simplest solution. I just need an 
overview which SCSI commands we should pass and not pass. Do you have an idea?

--hps