From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mattias Wadenstein Subject: Re: RAID Class Drives` Date: Fri, 19 Mar 2010 17:53:25 +0100 (MET) Message-ID: 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=ISO-8859-1; 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 , Joachim Otahal , linux-raid@vger.kernel.org List-Id: linux-raid.ids On Fri, 19 Mar 2010, Aryeh Gregor wrote: > On Fri, Mar 19, 2010 at 4:15 AM, John Robinson > wrote: >> Do you have a reference for this? Most drives' operating temperature= range >> is specified up to 55=B0C, sometimes higher for enterprise drives, w= ithout any >> indication (apart from common sense perhaps) that running them this = hot >> reduces lifespan. > > Google's study of >100,000 disks over 9 months or so > suggests that > hotter drives don't fail much more often: > > ". . . failures do not increase when the average temperature > increases. In fact, there is a clear trend showing that lower > temperatures are associated with higher failure rates. Only at very > high temperatures is there a slight reversal of this trend." (page 5 > of PDF) Do check out figure 5 though, I wouldn't run the drives hotter than=20 40-45=B0C based on that which does seem to indicate that hot drives don= 't=20 last as long. But then again, so would running them at <30=B0C... /Mattias Wadenstein -- 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