From owner-freebsd-questions@FreeBSD.ORG Tue Nov 17 21:03:26 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 67323106566B for ; Tue, 17 Nov 2009 21:03:26 +0000 (UTC) (envelope-from jgrosch@es.net) Received: from mailgw.es.net (mail1.es.net [IPv6:2001:400:201:1::2]) by mx1.freebsd.org (Postfix) with ESMTP id 4D41F8FC1D for ; Tue, 17 Nov 2009 21:03:26 +0000 (UTC) Received: from zen.es.net (odin.es.net [198.128.1.93]) (authenticated bits=0) by mailgw.es.net (8.14.3/8.14.3) with ESMTP id nAHL3PcN025925 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Tue, 17 Nov 2009 13:03:25 -0800 Message-ID: <4B030F9D.6090801@es.net> Date: Tue, 17 Nov 2009 13:03:25 -0800 From: Josef Grosch User-Agent: Thunderbird 2.0.0.23 (Macintosh/20090812) MIME-Version: 1.0 To: Modulok References: <64c038660911171249r141cc810n62a721e48225954c@mail.gmail.com> In-Reply-To: <64c038660911171249r141cc810n62a721e48225954c@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-Virus-Version: vendor=fsecure engine=1.12.8161:2.4.5, 1.2.40, 4.0.166 definitions=2009-11-17_11:2009-11-16, 2009-11-17, 2009-11-17 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 ipscore=0 phishscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx engine=5.0.0-0908210000 definitions=main-0911170182 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 21:03:26 -0000 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- YMMV, but. In the past I have not had good luck with Western Digital disks, they are 'consumer grade'. It has been my experience that Seagate drives hold up better. My $0.02 Josef -- Josef Grosch Email : jgrosch@es.net Computer Systems Engineer Office : 510-486-6597 Lawrence Berkeley National Laboratory Cell : 510-207-9976