From owner-freebsd-current@FreeBSD.ORG Fri Jun 17 13:33:22 2011 Return-Path: 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 4BF441065676; Fri, 17 Jun 2011 13:33:22 +0000 (UTC) (envelope-from yanegomi@gmail.com) Received: from mail-vw0-f54.google.com (mail-vw0-f54.google.com [209.85.212.54]) by mx1.freebsd.org (Postfix) with ESMTP id CAF8C8FC13; Fri, 17 Jun 2011 13:33:21 +0000 (UTC) Received: by vws18 with SMTP id 18so2743418vws.13 for ; Fri, 17 Jun 2011 06:33:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=/H2XJ1cO3nDKh35D83y9RVruiE8IBPdez1wIvEjN/cE=; b=k+h7QHc02+d9/iLX/s5T9muPydLbnq4t1WroiQxbi3EuSrN411y02ioCuH94k/lzmA k863uDrjocppe8JijEDy2HwugLWuBDg8s8PoHHJ9Vfk94Lpy3ozY4xZ9U19y+u9sJlLU IYawk2Q6ZcS4m57ANxhvdF738evM2kDmxhvqQ= 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=QWsJxhnXYQYFiaSAlnPv8+Kun4Cm867WoHpYSc/ie3lYYS9JyUhgDxq+gQ4nnCXVt0 2FjRACmfp02rI5a0Fp3S2X1+CADYPLEJBxskYX8yzou/vCspQFFWBCTg5vizCx1aVFHz l+MJi9kV4heKYAi648pO2OzsbqjcJigu5eiZU= MIME-Version: 1.0 Received: by 10.220.210.69 with SMTP id gj5mr836848vcb.58.1308317600900; Fri, 17 Jun 2011 06:33:20 -0700 (PDT) Received: by 10.220.189.202 with HTTP; Fri, 17 Jun 2011 06:33:20 -0700 (PDT) In-Reply-To: <1308316186.45314.21.camel@buffy.york.ac.uk> References: <4D8BBC29.6040500@FreeBSD.org> <1308316186.45314.21.camel@buffy.york.ac.uk> Date: Fri, 17 Jun 2011 06:33:20 -0700 Message-ID: From: Garrett Cooper To: Gavin Atkinson Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: Alexander Motin , FreeBSD-Current Subject: Re: graid hit the tree X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 17 Jun 2011 13:33:22 -0000 On Fri, Jun 17, 2011 at 6:09 AM, Gavin Atkinson wrote: > On Thu, 2011-03-24 at 23:48 +0200, Alexander Motin wrote: >> Hi. >> >> I've just committed the new GEOM-based software RAID driver (graid) into >> the HEAD [1]. Brave testers are welcome. :) >> >> 1. http://svn.freebsd.org/viewvc/base?view=3Drevision&revision=3D219974 > > One question. > > I'm very happy with the performance of the ahci subsystem, it is > measurably faster against the old ATA subsystem on modern hardware. =A0I > also really appreciate the compatibility shims to aid migration from the > adX style numbering to adaX. =A0On every system I've migrated so far, thi= s > mapping has worked flawlessly. > > Is there any chance that mapping from /dev/arX -> /dev/raid/r0 etc could > also be done? > > One thing that I have found is that it can be hard to determine from the > dmesg exactly where raid partitions will appear. =A0It would be wonderful > if devices similar to the "adX" devices could be made, for any graid > devices found. For this case, would it make more sense to advise folks to use devfs.conf ? Otherwise one would need to tell geom to talk ataraid a bit, which may or may not confuse some consumers. Thanks, -Garrett