From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joachim Otahal Subject: Re: RAID Class Drives` Date: Fri, 19 Mar 2010 19:14:50 +0100 Message-ID: <4BA3BF1A.2060905@gmx.net> References: <7db987b31003170648j19e3346bi1050e703ef8c811c@mail.gmail.com> <4BA258AD.5020605@gmx.net> <4BA33284.7000304@anonymous.org.uk> <7c2a12e21003190943t546ade49u2294310ed7d9921e@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <7c2a12e21003190943t546ade49u2294310ed7d9921e@mail.gmail.com> Sender: linux-raid-owner@vger.kernel.org To: Aryeh Gregor Cc: John Robinson , linux-raid@vger.kernel.org List-Id: linux-raid.ids Aryeh Gregor schrieb: > On Fri, Mar 19, 2010 at 4:15 AM, John Robinson > wrote: > =20 >> Do you have a reference for this? Most drives' operating temperature= range >> is specified up to 55=C2=B0C, sometimes higher for enterprise drives= , without any >> indication (apart from common sense perhaps) that running them this = hot >> reduces lifespan. >> =20 > Google's study of>100,000 disks over 9 months or so > suggests that > hotter drives don't fail much more often: > =20 Thanks for the link. That study was referred to as a comparison to the current situation. Bu= t=20 google only tested up to 400 GB in that statistic, and I DO remember=20 that my old 160GB to 500 GB drives were all a lot hotter than any of my= =20 current drives. Those Samsung 1TB drives only reached 35=C2=B0C during = last=20 hot summer, but I did let the fan rotate faster during the summer. Current real world data of my drives (Windows main machine, room=20 temperature is 23=C2=B0C right now): SAMSUNG 1 TB 27=C2=B0C (HD103UJ) WD 1 TB 30=C2=B0C (WD10 EACS-00ZJBO) WD 750 GB 34=C2=B0C (WD75 00AACS-00ZJBO) SAMSUNG 1 TB 25=C2=B0C (HD103UJ) Linux Server (mirrored drives): SEAGATE 1,5 TB 34=C2=B0C (ST31500341AS) SEAGATE 1,5 TB 34=C2=B0C (ST31500341AS) <- this one will probably fail = in one=20 or one and a half year if the realloc-sector count continues to develop= =20 this way. Joachim Otahal -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html