Re: RAID Class Drives`
From: Aryeh Gregor <hidden>
Date: 2010-03-19 16:43:15
On Fri, Mar 19, 2010 at 4:15 AM, John Robinson [off-list ref] wrote:
Do you have a reference for this? Most drives' operating temperature range is specified up to 55°C, sometimes higher for enterprise drives, without 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 <http://labs.google.com/papers/disk_failures.html> 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) "We can conclude that at moderate temperature ranges it is likely that there are other effects which affect failure rates much more strongly than temperatures do." (page 6) They were using SATA and PATA consumer drives, 5400 RPM to 7200 RPM, 80 to 400 GB, put into production in or after 2001 (from page 3). -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html