We first look at the correlation between average tem perature during the observation period and failure. Here we report data on averages and note that other aggregation forms have shown sim ilar trends and and therefore suggest the same conclu sions. We have aggregated temperature readings in severalĭifferent ways, including averages, maxima, fraction of time spent above a given temperature value, number of times a temperature threshold is crossed, and last tem perature before failure. ![]() Here we take temperature readings from the SMART records every few minutes during the entire 9-month window of observation and try to understand the correlation be tween temperature levels and failure rates. Previous studies have indicated that temperature deltas as low as 15C can nearly double disk drive failure rates. ![]() Temperature is often quoted as the most important envi ronmental factor affecting disk drive reliability. See Google's hard drive study, page 6: disk_failures.pdf don't overdo it with cooling if you don't need to. Temperature is a bit low, in general it's better to keep hard drives at around 30-40c. If it's not that big of a deal, just leave them spinning 24/7, that's what they're built for. I would put them to sleep, if power efficiency is really important. Take this information and make your choice personally, I wouldn't worry too much about spin-ups, especially since, as you said, there's days the disks are not even accessed. They're also not trying to be power efficient. Some say that spinning up the disks is what causes drives to fail, but others say that's just the moment you find out the drive has failed, and the lifespan isn't related to spin-ups.Īs a general rule, WD Reds (as other NAS HDDs and enterprise / server drives) are built for 24/7 operation, and have firmware optimizations for that kind of usage. Well, there's many contradicting opinions on the matter, because no one really has good empirical data on this. My question is if I should keep the drives running 24/7 because it's better for them or to keep my current settings? I've seen so many contradictory opinions out there.Īnother interesting thing is that when I'm copying large files (let's say 50GB total) over the network to the server (i've got shared folder accessed on other pc's using \\PCNAME\FolderX) I will often get the message that not enough storage is free, when there clearly is more than enough.Ģx WD Red Plus, 4TB WD40EFZX 2 external WD USB drives (these are mostly used to media streaming unless I play my BluRay's)Ĭorsair Vengeance LPX CMK16GX4M2E3200C16 (two DIMM's) ![]() The Red's aren't always used, some days they won't even be used at all whilst at other moments maybe a few times. One of the things I've done to achieve this is letting Windows put the drives to sleep after 20 minutes of inactivity. In pursuit of power efficiency (both for the bill and the planet) I've managed to get Idle power consumption to 23/21 watts at idle without giving in on performance when needed. I've just built a home server mainly used for media streaming and having our files backed up.
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