From owner-freebsd-current@freebsd.org Tue Dec 12 23:26:10 2017 Return-Path: Delivered-To: freebsd-current@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 6E024E88F48 for ; Tue, 12 Dec 2017 23:26:10 +0000 (UTC) (envelope-from fjwcash@gmail.com) Received: from mail-lf0-x230.google.com (mail-lf0-x230.google.com [IPv6:2a00:1450:4010:c07::230]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id E4ABA78A12; Tue, 12 Dec 2017 23:26:09 +0000 (UTC) (envelope-from fjwcash@gmail.com) Received: by mail-lf0-x230.google.com with SMTP id f20so600230lfe.3; Tue, 12 Dec 2017 15:26:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=IbuabOlbZfKjrZdrteHLdVk2hRXlWPXUW61Ncm9u+X0=; b=Ono8mkMUZ/QYESPf1eY6UBypeYKkKZ0fMxnh0lVZExxWqRon8TF5ibF9yb9PqBiegA ZUlR2Pc6uEbVMe3XQ8J2Cwe7lQonLKw0ku8+XkzHhjV68oRTDOFOLeAGHRa+Ji1tKbLq 1KJ5P0ZQKmV1zyFAe8KqUmBr+wQCr/yyCW/Rek3YZmF4spp3p8QmjKAlpoCZLbyN2wMF 0SCHYT1f5Z8cRabQejrljJBrAs8PbCEsxsbZ6siXvRLBblA1E5CzJ1NrKo1/bP2JH9PE Q1YBtvJl8RkfoJr8HBzA47y3yCkOxys87d9ZQloLV2LDkLewlPxgkJlr1LYTkDR4l05W Vzmg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=IbuabOlbZfKjrZdrteHLdVk2hRXlWPXUW61Ncm9u+X0=; b=nDGFdQfaqefSuqFtLjikfq2vT4EOq7xNVyLAiC1TATKaThACdJ1zA9VHHLIeHBfG/o s1AcJU31vVM3gra6FTxGx0NuDMfklShT9CLHfMpACeyWHnnDvisi4Sezi5GMV8MMTf45 uxjmRiQ6sAAkuSknws1XSStLqZw/FyXz8RbOqupAsEVENdwRedWXJRYNXFXyN8Ptv8r+ E3pJIGYQh11eq3BdXa8p+t19Mg60VAl9HSqTCj9a3rnA7MqVe3ayARy8hYrddk6Kczul JzVjgnzzcvqfQw80BP1kugjuRbzNXDNk0MGZRmCGGjYIhCZanWCDP8jFSgdvyue2k/6w NP6w== X-Gm-Message-State: AKGB3mJMPoPFnQbypn8OZiD2uQxqQj2D5h/3xFjl6J1AzoHg7dfj6cF5 uZAR5RMDhHoycbjmRygOvgE1Ll55sKQCuOJatvg= X-Google-Smtp-Source: ACJfBosBVVooPd11w0VoYruWgz0TCOBVggdDJy165z/CJe3PZbnkNSZl52/nAuosi3h4dmOodRz5CJC0HIXeJCfW5Xg= X-Received: by 10.25.181.193 with SMTP id g62mr267444lfk.43.1513121167756; Tue, 12 Dec 2017 15:26:07 -0800 (PST) MIME-Version: 1.0 Received: by 10.25.163.145 with HTTP; Tue, 12 Dec 2017 15:26:07 -0800 (PST) In-Reply-To: <201712122255.vBCMtnfZ088889@pdx.rh.CN85.dnsmgr.net> References: <20171212231858.294a2cb5@thor.intern.walstatt.dynvpn.de> <201712122255.vBCMtnfZ088889@pdx.rh.CN85.dnsmgr.net> From: Freddie Cash Date: Tue, 12 Dec 2017 15:26:07 -0800 Message-ID: Subject: Re: SMART: disk problems on RAIDZ1 pool: (ada6:ahcich6:0:0:0): CAM status: ATA Status Error To: "Rodney W. Grimes" Cc: "O. Hartmann" , FreeBSD CURRENT , Alan Somers Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.25 X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 Dec 2017 23:26:10 -0000 On Tue, Dec 12, 2017 at 2:55 PM, Rodney W. Grimes < freebsd-rwg@pdx.rh.cn85.dnsmgr.net> wrote: > Hum, just noticed this. 25k hours power on, 2M load cycles, this is > very hard on a hard drive. Your drive is going into power save mode > and unloading the heads. Infact at a rate of 81 times per hour? > Oh, I can not believe that. Either way we need to get this stopped, > it shall wear your drives out. > =E2=80=8BBelieve it. :) The WD Green drives have a head parking timeout o= f 15 seconds, and no way to disable that anymore. You used to be able to boot into DOS and run the tler.exe program from WD to disable the auto-parking feature, but they removed that ability fairly quickly. The Green drives are meant to be used in systems that spend most of their time idle. Trying to use them in an always-on RAID array is just asking for trouble. They are only warrantied for a couple hundred thousand head parkings or something ridiculous like that. 2 million puts it way out of the warranty coverage. :( We had 24 of them in a ZFS pool back when they were first released as they were very inexpensive. They lead to more downtime and replacement costs than any other drive we've used since (or even before). Just don't use them in any kind of RAID array or always-on system. --=20 Freddie Cash fjwcash@gmail.com