From owner-freebsd-questions@FreeBSD.ORG Thu Jun 19 02:56:31 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 329421065670 for ; Thu, 19 Jun 2008 02:56:31 +0000 (UTC) (envelope-from ml@t-b-o-h.net) Received: from vjofn.tucs-beachin-obx-house.com (vjofn-pt.tunnel.tserv1.fmt.ipv6.he.net [IPv6:2001:470:1f00:ffff::5e5]) by mx1.freebsd.org (Postfix) with ESMTP id D84E18FC15 for ; Thu, 19 Jun 2008 02:56:30 +0000 (UTC) (envelope-from ml@t-b-o-h.net) Received: from himinbjorg.tucs-beachin-obx-house.com (cpe-24-161-6-139.hvc.res.rr.com [24.161.6.139]) (authenticated bits=0) by vjofn.tucs-beachin-obx-house.com (8.14.2/8.14.2) with ESMTP id m5J2u5QG013805; Wed, 18 Jun 2008 22:56:15 -0400 (EDT) Received: from himinbjorg.tucs-beachin-obx-house.com (localhost.tucs-beachin-obx-house.com [127.0.0.1]) by himinbjorg.tucs-beachin-obx-house.com (8.13.8/8.13.6) with ESMTP id m5J2u7g8000288; Wed, 18 Jun 2008 22:56:07 -0400 (EDT) (envelope-from ml@t-b-o-h.net) Received: (from tbohml@localhost) by himinbjorg.tucs-beachin-obx-house.com (8.13.8/8.13.6/Submit) id m5J2u6Td000286; Wed, 18 Jun 2008 22:56:06 -0400 (EDT) (envelope-from tbohml) From: "Tuc at T-B-O-H.NET" Message-Id: <200806190256.m5J2u6Td000286@himinbjorg.tucs-beachin-obx-house.com> To: ryan.coleman@cwis.biz Date: Wed, 18 Jun 2008 22:56:06 -0400 (EDT) In-Reply-To: <2854.71.63.150.244.1213842322.squirrel@www.pictureprints.net> X-Mailer: ELM [version 2.5 PL8] MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org Subject: Re: [freebsd-questions] Re: "Fixing" a RAID 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: Thu, 19 Jun 2008 02:56:31 -0000 > > > > Ryan Coleman wrote: > >>> Ryan Coleman wrote: > > > > Oh, I completely forgot to ask... > > > > Does the RAID still operate even though one disk is bad? > > > > After all, that is the purpose of RAID-5. stripe, with parity. One > > fails, the other two (or N) keep right on going... > > > > Or, is it a RAID-5 card that you put into operation as a RAID-0 span? > > > > If the latter is the case, good luck ;) > > No, I'm not that stupid. :) My old job, we had the big LaCie drives and > one of the 4 250Gs in it would fail and they were f*ed. I went to replace > the drive right away so I wouldn't be in that situation. > > When I went to rebuild in the BIOS it failed at 2%, no matter what 250G > drive I put in to fill the spot. > I had that happen on a 4 disk (36G each) raid-5 (I forget the controller). No matter what disk I put in to replace a failed one, it wouldn't "take". 3 drives, exact model, different production dates... None took. I futzed and futzed and finally decided to declare the cage bad and think of backout procedures. About 2 hours after I had set another machine up to take its place, it started giving spurious errors and fell over. I pulled the machine out of the datacenter, cleared out the raid config, and went to rebuild with just the 3 drives. Wouldn't build a fresh raid-5 from just the 3 disks. After the "Which one of these things is not like the other", I found that apparently one of the disks still was working, but causing heck if I put another disk in the slot next to it. A year later, and I finally decided to buy a few more disks off ebay to see if my final theory is right. I win (hopefully) the auction in 5 days... If the cage really is bad, I previously sourced a new case/cage, and decided even though its a 4G Dual Xenon system I probably could get a new system cheaper thats faster. Tuc