From owner-freebsd-questions@FreeBSD.ORG Tue Nov 17 21:03:58 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 598321065693 for ; Tue, 17 Nov 2009 21:03:58 +0000 (UTC) (envelope-from amvandemore@gmail.com) Received: from mail-px0-f182.google.com (mail-px0-f182.google.com [209.85.216.182]) by mx1.freebsd.org (Postfix) with ESMTP id 2F00E8FC35 for ; Tue, 17 Nov 2009 21:03:57 +0000 (UTC) Received: by pxi12 with SMTP id 12so269108pxi.3 for ; Tue, 17 Nov 2009 13:03:57 -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; bh=sY/IEj7dhoRm1+Ma711ukALEqhzbY7b/oWMi8nxTtNI=; b=ue4NYCtO09ZzGOopUB4gPMboOILXnPwTCztysuWt/sKDLfq5XfVR9Jejhy2GMQLnbI hlCSNGIdPOmmt+7Vn2p5SYl4aSCXvgC6wxN7RYRCaU3KYxAUjkcz3JKiPvrtkpMqNLdW TZb4bH69guVBYM/ypwpxVDmJm5owhByAJdD+U= 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; b=ZYcsP0z/mEfXNyTJxd8rBQU+/hw0rAo/F3z4r3qdhnKuFveaPi8kdGWnHx3/oOXz03 jN4JeeUTjXUokBBk9/knr2FkOKZCxp6m+wpQLAmjgKkABcMxC9+SFiBq/sjPUK93wb9v AhkyYfOhiHLnAjw4s39cWnNd22lMMSIlrZaIc= MIME-Version: 1.0 Received: by 10.143.154.34 with SMTP id g34mr186014wfo.312.1258491837705; Tue, 17 Nov 2009 13:03:57 -0800 (PST) In-Reply-To: <64c038660911171249r141cc810n62a721e48225954c@mail.gmail.com> References: <64c038660911171249r141cc810n62a721e48225954c@mail.gmail.com> Date: Tue, 17 Nov 2009 15:03:57 -0600 Message-ID: <6201873e0911171303w2c37f1c3we928798a6760d393@mail.gmail.com> From: Adam Vande More To: Modulok Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-questions@freebsd.org Subject: Re: Wester Digital 'deep recovery cycle' and gstripe? 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: Tue, 17 Nov 2009 21:03:58 -0000 On Tue, Nov 17, 2009 at 2:49 PM, Modulok wrote: > List, > > Has anyone used 'Wester Digital Caviar Black' disks in a gstripe? > > I'm building a 2TB gstripe, from 3x 1TB disks. My concern, is the > disks are 'consumer grade' disks. Western Digital mention not to use > them with a raid controller as they have a potential, 'deep recovery > cycle', which an last up to 2 minutes. This would theoretically result > in them being dropped from the array. Despite this, I've heard > successful uses of these disks via gmirror. (Granted, not the same as > gstripe). Again, in theory, if one disk enters a 'deep recovery cycle' > and is dropped from the array, and during that time another disks does > the same the array is toast, right? > > Umm...what are the odds of this occurring? War stories? (The more I > type this out, the more it's starting to sound like a bad idea.) > Thoughts, ideas? > -Modulok- > > In a stripe, if one goes it all goes. However I am not certain it's an issue in your case, the gstripe labeling mode with create a persistent config. If there's not a better answer, best thing to do would be to test it out. setting up gstripe takes like 10 minutes. -- Adam Vande More