From owner-svn-src-all@FreeBSD.ORG Mon Jul 13 12:46:48 2009 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 815151065676; Mon, 13 Jul 2009 12:46:48 +0000 (UTC) (envelope-from unixmania@gmail.com) Received: from mail-fx0-f224.google.com (mail-fx0-f224.google.com [209.85.220.224]) by mx1.freebsd.org (Postfix) with ESMTP id 5900D8FC0C; Mon, 13 Jul 2009 12:46:47 +0000 (UTC) (envelope-from unixmania@gmail.com) Received: by fxm24 with SMTP id 24so1847225fxm.43 for ; Mon, 13 Jul 2009 05:46:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=Xc0akfhVqLxUY3lnwC6xw04BxCpm+7d1ggYybGxY1NY=; b=h+gQp5cebXKnwB0b8+eUw6HZF0uWUJiJjZbLzj2Fv7Wn2Hb5lFPsl+73fWexU/DRKu 1s2PZTeX1sBI/8y3mDKKvLIlaMC9lBC37amJCfeezz3TTElrkmemmwQ3WyH1mZfxkf2q pRAF6X0wANAiiNRo742FVZe/iZ3UuwV8YEgkc= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=UTlfvd1FAnhPQi30sm9vs5CqN098ng3Ra/5FzILjrxOmmFm8uVo1vKuGlpTaDwmUlS LoxwpMy7GJplMuAgVXzKd80SUCgoyuaPY8yEsYJD9CdDpoxGm/4GgLR6vsWEsLDtWHO1 tjlaBeG2Hlj8oRml5NXHHm4d+wd1tW8I2jtrE= MIME-Version: 1.0 Received: by 10.239.169.80 with SMTP id n16mr451438hbe.167.1247489206359; Mon, 13 Jul 2009 05:46:46 -0700 (PDT) In-Reply-To: <4A5AC36D.1040705@FreeBSD.org> References: <37131.1247214217@critter.freebsd.dk> <4A56FC7C.8060107@samsco.org> <4A5AC36D.1040705@FreeBSD.org> Date: Mon, 13 Jul 2009 09:46:46 -0300 Message-ID: From: "Carlos A. M. dos Santos" To: Alexander Motin Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: svn-src-head@freebsd.org, Poul-Henning Kamp , src-committers@freebsd.org, Scott Long , svn-src-all@freebsd.org Subject: Re: svn commit: r195534 - in head: etc/mtree include lib/libcam sbin/camcontrol share/man/man4 sys/cam sys/cam/ata sys/cam/scsi sys/conf sys/dev/advansys sys/dev/ahci sys/dev/aic7xxx sys/dev/amd sys/de... X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 13 Jul 2009 12:46:51 -0000 On Mon, Jul 13, 2009 at 2:17 AM, Alexander Motin wrote: > Carlos A. M. dos Santos wrote: >> >> On Fri, Jul 10, 2009 at 5:31 AM, Scott Long wrote: >>> >>> Poul-Henning Kamp wrote: >>>> >>>> In message <200907100818.n6A8I8p1011853@svn.freebsd.org>, Scott Long >>>> writes: >>>> >>>>> =A0ATA drives are accessed via 'ada' device nodes. >>>> >>>> It there a particular good reason why we insist on making this >>>> silly mistake every five years ? >>>> >>>> I am pretty sure you were around when Justin won friends by renaming >>>> the SCSI disk devices ? >>> >>> 1. I clearly stated that the name is experimental and that a change in >>> the future is possible. >> >> Well, from a user's perspective, if CD/DVD drives are to be seen as >> 'cdX', then it would make sense that hard disks were seen as daX, as >> already advertised by cam(4). > > cdX implemented by cd(4) driver in both cases uses the same SCSI command > set. In ATA case, SCSI commands are just wrapped within ATAPI PACKET > command. For disks, situation is completely different, as ATA disks have > completely different command and feature set. So da(4) is a driver for SC= SI > command set devices and ada(4) is a driver for ATA command set devices. I know, but that is the driver's perspective, not the user's perspective. --=20 My preferred quotation of Robert Louis Stevenson is "You cannot make an omelette without breaking eggs". Not because I like the omelettes, but because I like the sound of eggs being broken.