From owner-freebsd-questions@FreeBSD.ORG Thu Nov 18 23:10:45 2010 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 CC892106566B for ; Thu, 18 Nov 2010 23:10:45 +0000 (UTC) (envelope-from paul@fletchermoorland.co.uk) Received: from hydra.fletchermoorland.co.uk (hydra.fletchermoorland.co.uk [78.33.209.59]) by mx1.freebsd.org (Postfix) with ESMTP id 422F58FC16 for ; Thu, 18 Nov 2010 23:10:44 +0000 (UTC) Received: from demophon.fletchermoorland.co.uk ([192.168.0.154]) by hydra.fletchermoorland.co.uk (8.14.3/8.14.3) with ESMTP id oAIMiCOI032779; Thu, 18 Nov 2010 22:44:12 GMT (envelope-from paul@fletchermoorland.co.uk) Message-ID: <4CE5AC3C.8000402@fletchermoorland.co.uk> Date: Thu, 18 Nov 2010 22:44:12 +0000 From: Paul Wootton User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US; rv:1.9.2.8) Gecko/20100817 Lightning/1.0b2 Thunderbird/3.1.2 MIME-Version: 1.0 To: Chuck Swiger , Andy Wodfer References: <4CE52F49.4010602@sentex.net> <218D523D-A5BF-4E37-BC75-2FBF67C1D618@mac.com> In-Reply-To: <218D523D-A5BF-4E37-BC75-2FBF67C1D618@mac.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-2.9 required=7.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on hydra.fletchermoorland.co.uk Cc: freebsd-questions Subject: Re: FreeBSD and large harddrives 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: Thu, 18 Nov 2010 23:10:45 -0000 On 11/18/10 18:23, Chuck Swiger wrote: > On Nov 18, 2010, at 5:51 AM, Mike Tancsa wrote: >> On 11/18/2010 7:16 AM, Andy Wodfer wrote: >>> Harddrive speed is not so important so a 5400rpm drive >>> would be OK. Seems like the green line of WD harddrives use both 5400rpm and >>> 7200rpm. I will use RAID 5. >> I would stay away from the green series hard drives for this >> application. There have been a number of reports of issues with the >> drive's power saving design causing problems when used in raid arrays. >> Search the list for more details. Use their black series instead. > While the WDC green drives are unsuitable for any RAID application From my own personal experience, I will not use WD Green drives again, be it for RAID or not. I have a one as my boot up and OS drive on a home server configured as a single drive in a ZFS pool (so none RAID). The load/unload cycle is rated at 300,000. Here is a copy from smartctl 9 Power_On_Hours 0x0032 092 092 000 Old_age Always - 5958 193 Load_Cycle_Count 0x0032 001 001 000 Old_age Always - 885346 The drive has less than 250 days online, but is nearly at tripple the rated load/unload cycle. While the drive is still working, I have NO faith in it anymore and am just waiting for it to die. Paul