From owner-freebsd-questions@FreeBSD.ORG Thu Nov 18 18:23:05 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 27CA8106566C for ; Thu, 18 Nov 2010 18:23:05 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from asmtpout024.mac.com (asmtpout024.mac.com [17.148.16.99]) by mx1.freebsd.org (Postfix) with ESMTP id 10DB28FC16 for ; Thu, 18 Nov 2010 18:23:04 +0000 (UTC) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: text/plain; CHARSET=US-ASCII Received: from cswiger1.apple.com ([17.209.4.71]) by asmtp024.mac.com (Oracle Communications Messaging Exchange Server 7u4-18.01 64bit (built Jul 15 2010)) with ESMTPSA id <0LC300CNUF2DTH70@asmtp024.mac.com> for freebsd-questions@freebsd.org; Thu, 18 Nov 2010 10:23:01 -0800 (PST) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.2.15,1.0.148,0.0.0000 definitions=2010-11-18_08:2010-11-18, 2010-11-18, 1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 ipscore=0 suspectscore=0 phishscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx engine=6.0.2-1010190000 definitions=main-1011180146 From: Chuck Swiger In-reply-to: <4CE52F49.4010602@sentex.net> Date: Thu, 18 Nov 2010 10:23:01 -0800 Message-id: <218D523D-A5BF-4E37-BC75-2FBF67C1D618@mac.com> References: <4CE52F49.4010602@sentex.net> To: Andy Wodfer X-Mailer: Apple Mail (2.1082) 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 18:23:05 -0000 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, and the WDC black series drives would be better, I'd only use them for a RAID-1 or RAID-10 setup. If the OP wants to use RAID-5 then you really need to go with the RE3/RE4 or RE-GP enterprise models due to TLER: http://wdc.custhelp.com/cgi-bin/wdc.cfg/php/enduser/std_adp.php?p_faqid=1397 Otherwise, you're quite likely to have a drive or two get dropped out of the array due to a single bad sector, and you might end up having the entire RAID-5 volume getting corrupted as a consequence.... Regards, -- -Chuck