From owner-freebsd-fs@FreeBSD.ORG Fri Aug 22 07:17:04 2003 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 8353B16A4BF for ; Fri, 22 Aug 2003 07:17:04 -0700 (PDT) Received: from out-mx1.crosswinds.net (out-mx1.crosswinds.net [216.18.117.38]) by mx1.FreeBSD.org (Postfix) with ESMTP id E0EBD43F85 for ; Fri, 22 Aug 2003 07:17:03 -0700 (PDT) (envelope-from tony@crosswinds.net) Received: from admin.crosswinds.net (out-mx1.crosswinds.net [216.18.117.38]) by out-mx1.crosswinds.net (Postfix) with ESMTP id 2A00B2B038 for ; Fri, 22 Aug 2003 10:17:03 -0400 (EDT) Received: by admin.crosswinds.net (Postfix, from userid 1001) id DCB7C3F0B; Fri, 22 Aug 2003 10:17:02 -0400 (EDT) Date: Fri, 22 Aug 2003 10:17:02 -0400 From: Tony Holmes To: freebsd-fs@FreeBSD.ORG Message-ID: <20030822101702.A73928@crosswinds.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i Subject: RAID 1+0 X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 22 Aug 2003 14:17:04 -0000 Just a quick question. I've been running a couple servers using vinum's RAID 5. Last night I had 2 of the disks in the RAID set drop dead (the first and last physcial drives) killing all the data on the set. This is not the first time I've lost all my RAID 5 data due to 2 disks dropping in a very short period of time (this is the third time actually). Thank god for backups. I was particularly frustrated because I have been trying to find a software solution to provide RAID 1+0 - striping of mirrored disks. Neither vinum nor ccd seem to support this and it would be *amazing* if they could. In the case of 2 disks dropping, I wouldn't have had any issues. I would have had 1 mirror of each of the mirrored pairs drop leaving the other mirrors up and striped (the first and last disk being the lucky combo in my particular use). In the case of RAID 5 and 0+1 (mirroring of stripes) I am dead in the water with 2 disk failures. Is there any intention of supporting this in any form? (I'm currently running -STABLE). Would RaidFrame help? If I have to move to a h/w controller then I will do it, I'm just getting tired of defying the odds and losing my data and having to restore :) -- Tony Holmes Founder and Senior Systems Architect Crosswinds Internet Communications Inc.