From owner-freebsd-questions@FreeBSD.ORG Mon Jul 9 15:15:29 2012 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id ADF591065670 for ; Mon, 9 Jul 2012 15:15:29 +0000 (UTC) (envelope-from jusher71@yahoo.com) Received: from nm25-vm4.bullet.mail.ne1.yahoo.com (nm25-vm4.bullet.mail.ne1.yahoo.com [98.138.91.185]) by mx1.freebsd.org (Postfix) with SMTP id 3DA608FC17 for ; Mon, 9 Jul 2012 15:15:29 +0000 (UTC) Received: from [98.138.90.57] by nm25.bullet.mail.ne1.yahoo.com with NNFMP; 09 Jul 2012 15:12:24 -0000 Received: from [98.138.89.251] by tm10.bullet.mail.ne1.yahoo.com with NNFMP; 09 Jul 2012 15:12:24 -0000 Received: from [127.0.0.1] by omp1043.mail.ne1.yahoo.com with NNFMP; 09 Jul 2012 15:12:24 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 609665.83823.bm@omp1043.mail.ne1.yahoo.com Received: (qmail 22028 invoked by uid 60001); 9 Jul 2012 15:12:24 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1341846744; bh=/uMAaUrqp6Bj2PiS1Pb4UaTcz0tri+QvOmiuQc3YrbA=; h=X-YMail-OSG:Received:X-Mailer:Message-ID:Date:From:Subject:To:MIME-Version:Content-Type; b=aiX3XTFP1TcEHQ6EpS9H5wH6x2BQ5EuU5sm2Xv9iRKKYFKlIs7fWjLX3VL3jwlM46Ne84b+BiSxYvmYpux5ouoIjdrjFKD3IcKonwC2a3rIgVmJOpI/YU5BsW3d4YN6XVP5rLgwxxSirnVsVs1NzJj2sVAFceOlgFfHXftFGaaw= DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:Message-ID:Date:From:Subject:To:MIME-Version:Content-Type; b=o9ZoVa7/cdlIf6+L4t5MvpA7Vs7OEs1C8poq2VjtxHojvj3lYhMYPvNzT6uQH7aZJC6mM+PlHykZ9cLTyi6RzJYSdJZWx6bg85XU8KUlSvuml2yXtncT0ERt+M8KkbJMtX+fCiZ1v0NAdxAxy9Xifz3q42Y9kcGAzYfynqdq/P4=; X-YMail-OSG: 1PRTnKoVM1k4jCRmgCBA7IF589uRYy.TCXUwlZJUZgAIhQr GOO93uMM79JwxZVyBOIZmFTQJiAy99EZSlhzT9KIDz7N4rUN5TqW0.fg.z5V FB0VCTz9DHGwXmt4iI1pDNiGLnCZPt6j3M8rXJzxGN.9HjVnS7mHsEu1nKe8 juaIzid9Sc7ZFNGZS.pYuktqtXXr69R30EKQHh6Cbs7R.5fwVnAZtb_3VITU vMWg5fCV8LGaUR2Z3CWSKcRGFf44ysB8jGLzWmNMPlL.NjExVpSHm6L4Fuso PtLirxuE89QcLuCWIdsPuISNPw2dcvPYxMLSPTwIp42JbZdtbsKbG3fLl6kV WbSBwn3okUJI83AiRYPv86B8GTmVeXMjwc3uo12ZAPg7NgPYd8SyY2EyBMbC 2 Received: from [66.41.240.246] by web122506.mail.ne1.yahoo.com via HTTP; Mon, 09 Jul 2012 08:12:24 PDT X-Mailer: YahooMailClassic/15.0.8 YahooMailWebService/0.8.120.356233 Message-ID: <1341846744.40490.YahooMailClassic@web122506.mail.ne1.yahoo.com> Date: Mon, 9 Jul 2012 08:12:24 -0700 (PDT) From: Jason Usher To: freebsd-questions@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Subject: Using smartctl to detect "scan errors" (like google tells me to do ...) 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: Mon, 09 Jul 2012 15:15:29 -0000 The big report that google published made it clear that even a single "scan error" in the SMART data of a disk drive is a good predictor of eventual failure... However, when I run smartctl: # smartctl -a /dev/da0 | grep -i pre-fail 1 Raw_Read_Error_Rate 0x000b 100 100 016 Pre-fail Always - 0 2 Throughput_Performance 0x0005 135 135 054 Pre-fail Offline - 84 3 Spin_Up_Time 0x0007 126 126 024 Pre-fail Always - 612 (Average 612) 5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always - 0 7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always - 0 8 Seek_Time_Performance 0x0005 123 123 020 Pre-fail Offline - 31 10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always - 0 There is nothing called a "scan error". Further, the wikipedia page for S.M.A.R.T. has nothing in the error table called a "scan error". So ... What is a scan error, and which metric should I tell smartctl to check ? Thanks.