From owner-freebsd-questions@FreeBSD.ORG Mon Jan 15 16:05:25 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id F371F16A40F for ; Mon, 15 Jan 2007 16:05:24 +0000 (UTC) (envelope-from youshi10@u.washington.edu) Received: from mxout2.cac.washington.edu (mxout2.cac.washington.edu [140.142.33.4]) by mx1.freebsd.org (Postfix) with ESMTP id D057913C441 for ; Mon, 15 Jan 2007 16:05:24 +0000 (UTC) (envelope-from youshi10@u.washington.edu) Received: from smtp.washington.edu (smtp.washington.edu [140.142.33.9] (may be forged)) by mxout2.cac.washington.edu (8.13.7+UW06.06/8.13.7+UW06.09) with ESMTP id l0FG5OVH020802 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Mon, 15 Jan 2007 08:05:24 -0800 X-Auth-Received: from [192.168.0.102] (dsl254-013-145.sea1.dsl.speakeasy.net [216.254.13.145]) (authenticated authid=youshi10) by smtp.washington.edu (8.13.7+UW06.06/8.13.7+UW06.09) with ESMTP id l0FG5OEB010638 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NOT) for ; Mon, 15 Jan 2007 08:05:24 -0800 Mime-Version: 1.0 (Apple Message framework v752.2) In-Reply-To: <20070115152838.GA19982@cactus.homeunix.org> References: <20070115152838.GA19982@cactus.homeunix.org> X-Gpgmail-State: !signed Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: Content-Transfer-Encoding: 7bit From: Garrett Cooper Date: Mon, 15 Jan 2007 08:05:22 -0800 To: freebsd-questions@freebsd.org X-Mailer: Apple Mail (2.752.2) X-PMX-Version: 5.2.2.285561, Antispam-Engine: 2.5.0.283055, Antispam-Data: 2007.1.15.74933 X-Uwash-Spam: Gauge=IIIIIII, Probability=7%, Report='__CP_URI_IN_BODY 0, __CT 0, __CTE 0, __CT_TEXT_PLAIN 0, __HAS_MSGID 0, __HAS_X_MAILER 0, __MIME_TEXT_ONLY 0, __MIME_VERSION 0, __SANE_MSGID 0' Subject: Re: What's the difference between atausb and umass? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Jan 2007 16:05:25 -0000 On Jan 15, 2007, at 7:28 AM, Zeng Nan wrote: > Hi, > > As FreeBSD 6.2 is available now, I notice that a new feature is > that ata > driver can support usb mass transport by enable atausb in the kernel. > I'd like to know if atausb has any advantages over traditional umass. > Sometimes when I use external hard disk through usb, the system may > hang. I wonder if atausb solved this problem or not? > > Regards, > -- > Zeng Nan > > MY BLOG: http://zengnan.blogspot.com > Public Key: http://pgp.mit.edu/ | www.keyserver.net > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > ~ > It's lucky you're going so slowly, because > you're going in the wrong direction. > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > ~ Just a guess, but I would think that atausb only works for external drives connected via USB, whereas umass is used for all mass storage devices connected via USB (cameras, flash cards, thumb drives, etc). The online manpages don't turn up anything for atausb, so I'm unsure what that feature does exactly in the kernel. -Garrett