From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1Q9C7h-0007Q5-P2 for garchives@archives.gentoo.org; Mon, 11 Apr 2011 08:05:26 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 467AE1C022; Mon, 11 Apr 2011 08:04:07 +0000 (UTC) Received: from mta-2.ms.rz.rwth-aachen.de (mta-2.ms.rz.RWTH-Aachen.DE [134.130.7.73]) by pigeon.gentoo.org (Postfix) with ESMTP id 0BD9B1C022 for ; Mon, 11 Apr 2011 08:04:06 +0000 (UTC) Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-disposition: inline Content-type: text/plain; charset=us-ascii Received: from ironport-out-1.rz.rwth-aachen.de ([134.130.5.40]) by mta-2.ms.rz.RWTH-Aachen.de (Sun Java(tm) System Messaging Server 6.3-7.04 (built Sep 26 2008)) with ESMTP id <0LJH00GFYAEUZI00@mta-2.ms.rz.RWTH-Aachen.de> for gentoo-user@lists.gentoo.org; Mon, 11 Apr 2011 10:04:06 +0200 (CEST) X-IronPort-AV: E=Sophos;i="4.63,338,1299452400"; d="scan'208";a="105754273" Received: from relay-2.ms.rz.rwth-aachen.de (HELO relay.rwth-aachen.de) ([134.130.7.75]) by ironport-in-1.rz.rwth-aachen.de with ESMTP; Mon, 11 Apr 2011 10:04:06 +0200 Received: from numa-i.igpm.rwth-aachen.de (numa-i.igpm.RWTH-Aachen.DE [134.130.161.252]) by relay.rwth-aachen.de (8.14.4+Sun/8.13.8/1) with ESMTP id p3B846LG003841 for ; Mon, 11 Apr 2011 10:04:06 +0200 (CEST) Received: from numa-i (localhost [127.0.0.1]) by numa-i.igpm.rwth-aachen.de (Postfix) with ESMTP id BAF62AEA for ; Mon, 11 Apr 2011 10:04:07 +0200 (CEST) Date: Mon, 11 Apr 2011 10:04:07 +0200 From: Helmut Jarausch Subject: Re: [gentoo-user] [OT] Disk recommendations? To: gentoo-user@lists.gentoo.org In-reply-to: X-Mailer: Balsa 2.4.9 Message-id: <1302509047.18733.0@numa-i> X-Archives-Salt: X-Archives-Hash: 96d40a6c3aba457e540e12c342e82865 On 04/10/2011 03:50:59 PM, Mark Knecht wrote: > On Sun, Apr 10, 2011 at 12:50 AM, Peter Humphrey > wrote: > .... > I read about again and again is a RAID user who loses 1 drive and > then, while in the process of fixing the RAID, loses a second drive. > Most of us (myself included) buy identical drives all at the same > time > from the same vendor. This means all the drives were likely from the > same manufacturing batch and, if they are drives that will fail at > all > then the group will likely experience multiple drive failures. The Life time is always a statistical statement and therefore I consider it very unlikely that two or more of them fail at the same time - perhaps with one (big) exception. A given brand/model might be very sensitive to power failures or excess voltages, and in that case many of them could fail after a power failure - or excess voltage. Since my data is not rapidly changing, I backup my data several times a day onto a spare disk which I spin down in between (using hdparm). At least I hope to increase the life time of that backup disk this way. Helmut.