From owner-freebsd-fs@FreeBSD.ORG Fri Sep 17 16:18:50 2010 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 5325B10656FF for ; Fri, 17 Sep 2010 16:18:50 +0000 (UTC) (envelope-from jdc@koitsu.dyndns.org) Received: from qmta06.westchester.pa.mail.comcast.net (qmta06.westchester.pa.mail.comcast.net [76.96.62.56]) by mx1.freebsd.org (Postfix) with ESMTP id E9FAA8FC2C for ; Fri, 17 Sep 2010 16:18:49 +0000 (UTC) Received: from omta14.westchester.pa.mail.comcast.net ([76.96.62.60]) by qmta06.westchester.pa.mail.comcast.net with comcast id 7njY1f00A1HzFnQ56sJpMe; Fri, 17 Sep 2010 16:18:49 +0000 Received: from koitsu.dyndns.org ([98.248.41.155]) by omta14.westchester.pa.mail.comcast.net with comcast id 7sJo1f00l3LrwQ23asJpWt; Fri, 17 Sep 2010 16:18:49 +0000 Received: by icarus.home.lan (Postfix, from userid 1000) id 8ECCF9B427; Fri, 17 Sep 2010 09:18:47 -0700 (PDT) Date: Fri, 17 Sep 2010 09:18:47 -0700 From: Jeremy Chadwick To: Freddie Cash Message-ID: <20100917161847.GA58503@icarus.home.lan> References: <4C9385B0.2080909@shatow.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) Cc: freebsd-fs@freebsd.org Subject: Re: what happens to pool if ZIL dies on ZFS v14 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 17 Sep 2010 16:18:50 -0000 On Fri, Sep 17, 2010 at 09:17:11AM -0700, Freddie Cash wrote: > On Fri, Sep 17, 2010 at 8:35 AM, Gil Vidals wrote: > > Bryan thank you for the detailed answer. > > > > Assuming the ZIL SSD died, what steps would I follow to recover the pool? (i > > hope it is recoverable). > > If you are running ZFSv1 through ZFSv18 and your log device dies, your > pool is dead, gone, unrecoverable, no secret prize, no continues, do > not pass go, etc, etc, etc. > > If you are running ZFSv19 or newer and your log device dies, you can > remove the dead device and carry on. You will lose any data that was > in the ZIL, but the pool will be intact. Given the severity of this predicament, then why is it people are disabling the ZIL (via vfs.zfs.zil_disable=1) ? -- | Jeremy Chadwick jdc@parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |