From owner-freebsd-stable@FreeBSD.ORG Mon Feb 8 13:56:37 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 1DC2F10656A4 for ; Mon, 8 Feb 2010 13:56:37 +0000 (UTC) (envelope-from dan.naumov@gmail.com) Received: from mail-yx0-f199.google.com (mail-yx0-f199.google.com [209.85.210.199]) by mx1.freebsd.org (Postfix) with ESMTP id 948088FC19 for ; Mon, 8 Feb 2010 13:56:36 +0000 (UTC) Received: by yxe37 with SMTP id 37so1977858yxe.27 for ; Mon, 08 Feb 2010 05:56:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=zGQft543CCF2BpyikUlZk0QyTwZaPal/xJ2UKuMCruM=; b=ms2p6zfcJTI5HMImUJJuaprNmzOXga0DuGRB+INF2bkRY64lP2IzTaIGiHe0h31Nhr 676gtL7DsgYjvOzS6HosxYU7bcjoi29oHvDCYXfc8FRaVFqt3sqe9HFpnINgL3mHnU93 ZSYvFSdwNmoQzdEBnLEGV1Z56k55U0KXbqQ7Y= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=Ut/+MtQJ+slCIfATI8Mu4/TcKuWG6CI7n4QQUDk8J+auMHRiiK8Wcs/PRup9LdUfAh MSVViKtoCHfB1qgJ3XHyjmp50EnCYXhD+ldWDfy8TVvXtDFg2eC8DEZwDaYhoQaGLTHM E6dY6nRp6li4vr1iHy9FEt+Xg6UPQb7tf/zLs= MIME-Version: 1.0 Received: by 10.101.199.30 with SMTP id b30mr8168779anq.177.1265637395722; Mon, 08 Feb 2010 05:56:35 -0800 (PST) In-Reply-To: <20100208145504.762eaa7b.gerrit@pmp.uni-hannover.de> References: <20100208145504.762eaa7b.gerrit@pmp.uni-hannover.de> Date: Mon, 8 Feb 2010 15:56:35 +0200 Message-ID: From: Dan Naumov To: =?ISO-8859-1?Q?Gerrit_K=FChn?= Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: FreeBSD-STABLE Mailing List Subject: Re: one more load-cycle-count problem X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Feb 2010 13:56:37 -0000 2010/2/8 Gerrit K=FChn : > On Mon, 8 Feb 2010 15:43:46 +0200 Dan Naumov wrote > about RE: one more load-cycle-count problem: > > DN> >Any further ideas how to get rid of this "feature"? > > DN> 1) The most "clean" solution is probably using the WDIDLE3 utility on > DN> your drives to disable automatic parking or in cases where its not > DN> possible to complete disable it, you can adjust it to 5 minutes, whic= h > DN> essentially solves the problem. Note that going this route will > DN> probably involve rebuilding your entire array from scratch, because > DN> applying WDIDLE3 to the disk is likely to very slightly affect disk > DN> geometry, but just enough for hardware raid or ZFS or whatever to bar= k > DN> at you and refuse to continue using the drive in an existing pool (th= e > DN> affected disk can become very slightly smaller in capacity). Backup > DN> data, apply WDIDLE3 to all disks. Recreate the pool, restore backups. > DN> This will also void your warranty if used on the new WD drives, > DN> although it will still work just fine. > > Thanks for the warning. How on earth can a tool to set the idle time > affect the disk geometry?! WDIDLE3 changes the drive firmware. This is also how WD can detect you've used it on your disk and void your warranty accordingly :) - Sincerely, Dan Naumov