From owner-freebsd-fs@FreeBSD.ORG Tue Oct 30 15:50:17 2012 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 1DE87386 for ; Tue, 30 Oct 2012 15:50:17 +0000 (UTC) (envelope-from freebsd@penx.com) Received: from btw.pki2.com (btw.pki2.com [IPv6:2001:470:a:6fd::2]) by mx1.freebsd.org (Postfix) with ESMTP id D8A3A8FC0C for ; Tue, 30 Oct 2012 15:50:16 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by btw.pki2.com (8.14.5/8.14.5) with ESMTP id q9UFo1CI022253; Tue, 30 Oct 2012 08:50:01 -0700 (PDT) (envelope-from freebsd@penx.com) Subject: Re: ZFS RaidZ-2 problems From: Dennis Glatting To: Paul Wootton In-Reply-To: <508FE643.4090107@fletchermoorland.co.uk> References: <508F98F9.3040604@fletchermoorland.co.uk> <1351598684.88435.19.camel@btw.pki2.com> <508FE643.4090107@fletchermoorland.co.uk> Content-Type: text/plain; charset="us-ascii" Date: Tue, 30 Oct 2012 08:50:01 -0700 Message-ID: <1351612201.88435.23.camel@btw.pki2.com> Mime-Version: 1.0 X-Mailer: Evolution 2.32.1 FreeBSD GNOME Team Port Content-Transfer-Encoding: 7bit X-yoursite-MailScanner-Information: Dennis Glatting X-yoursite-MailScanner-ID: q9UFo1CI022253 X-yoursite-MailScanner: Found to be clean X-MailScanner-From: freebsd@penx.com Cc: freebsd-fs@freebsd.org X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 30 Oct 2012 15:50:17 -0000 On Tue, 2012-10-30 at 14:37 +0000, Paul Wootton wrote: > On 10/30/12 12:04, Dennis Glatting wrote: > > I've had this problem too. Here is what I can tell you for my case. > > ... I replaced the card, the cable, and the disks themselves leaving > > only one other possibility -- the power supply. The faulting array was > > on a separate cable from the power supply. I replaced the power > > supply, going from a 1,000W to 1,300W, and the power cables to the > > disks. Not a problem since. > > While I can accept that I might have a bad power supply. or cables, my > main concern is that I have only 1 drive showing as "Unavail" on a > RAIDZ-2 and the pack is showing "Faulted". > I would have expected that pack to continue working with 2 bad drives, > and would have failed if I had 3rd one fail I have successfully upgraded arrays by replacing disks in a RAIDz and RAIDz2 array one at a time, so I know for certain one disk failures work as expected. I tried replacing two at once in a RAIDz2 array but it did not succeed; however it was also the array with the bad power supply. That said, it certainly tried to rebuild the array.