From mboxrd@z Thu Jan 1 00:00:00 1970 From: Richard Scobie Subject: Re: raid5 - failed disks - i'm confusing Date: Tue, 05 Apr 2005 07:46:04 +1200 Message-ID: <4251997C.30001@sauce.co.nz> References: <1112641157.29559.22.camel@compaq-rhel4.xsintricity.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1112641157.29559.22.camel@compaq-rhel4.xsintricity.com> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Doug Ledford wrote: > Anyway, it might or might not hurt the drives to run them well below > their designed operating temperature, I don't have schematics and > materials lists in front of me to tell for sure. But second guessing > mechanical engineers that likely have compensated for thermal issues at > a given, specific common operating temperature is usually risky. Most > people think "Heat kills" and therefore like to keep things as cool as > possible. For mechanical devices anyway, it's not so much that heat > kills, as it is operating outside of the designed temperature range, > either above or below, that reduces overall life expectancy. Keep your > drives from overheating, but don't try to freeze them would be my > advice. Indeed. This paper http://www.hitachigst.com/hdd/technolo/drivetemp/drivetemp.htm shows some of the factors you mention and for what it's worth Hitachi's recommended operating range is 5 - 55 C for their 15K SCSI. Regards, Richard