March 17, 200917 yr At NAS' request, here is a new thread... It may have been discussed before, but lets see what people have experienced personally in this arena and what theory/statistics you beleave. Here are my Temps (after sleep and several minutes into a parity check): Model / Serial No. Temperature parity ata-WDC_WD10EADS 19°C disk1 ata-WDC_WD10EACS 19°C disk2 ata-WDC_WD10EAVS 17°C disk3 ata-ST3320620AS 21°C disk4 ata-WDC_WD2500JB 15°C disk5 ata-WDC_WD2500JB 15°C Now, these are freshly spun up drives after sitting for the night (In my nice dry, cool, cellar, with fans blowing accross them... the cellar averages about 15-18 C, perhaps a bit lower over night right now). after a few minutes of a parity check running: Model / Serial No. Temperature parity ata-WDC_WD10EADSWCAU 20°C disk1 ata-WDC_WD10EACSWCAU 20°C disk2 ata-WDC_WD10EAVSWCAU 20°C disk3 ata-ST3320620AS 24°C disk4 ata-WDC_WD2500JBWCAL 26°C disk5 ata-WDC_WD2500JBWCAL 25°C After reading google's "report"... I'm thinking this is a bit too cool... I'm probably going to reduce the speed of the fans and even remove one of the extra exhaust fans I have). The room itself looks like it will do most of the job for me. It is interesting to see the older IDE drives (disk4+5) get much warmer than the newer (and "Green" WD drives). I've got a WD Black coming, so I'll be interested to see where that comes out in this list. [edit] Well into the Parity Check: Model / Serial No. Temperature parity ata-WDC_WD10EADS-00L5B1 22°C disk1 ata-WDC_WD10EACS-00D6B0 23°C disk2 ata-WDC_WD10EAVS-00D7B1 22°C disk3 ata-ST3320620AS_5QF4CJLP 27°C disk4 ata-WDC_WD2500JB-00GVA0 29°C disk5 ata-WDC_WD2500JB-00GVA0 28°C
March 17, 200917 yr My server sits in an unfinished basement and temps are similar to yours. In the heat of summer I may hit 32 or even 34 degrees C, but that is rare. If you search the internet you'll find a number of debates on the Google study. After donig a lot of research, I personally have no issues with temps in the teens and twenties. I am much more fearful of high temps. If you're going to eliminate some cooling because it is overkill and removing it will save energy - go for it. But I don't think you'll have much, if any, impact in hard disk reliability. And you'd never know it either way. I, personally, think that heating up and cooling down is bad on drives, and that therefore reducing the differential is a good thing. I'd therefore be more concerned, for example, if my spun down temps were 20 and my spun up temps were 45, then if my spun down temps were 32, and my spun up temps were 45. The truth is that these drives are pretty darn reliable. If they're gonna fail, they're gonna fail, and a few degrees C is likely not going to be the reason. They usually either fail early in their life or outlive their usefulness. The more important thing is to monitor them for signs of failure and get them replaced when they are heading south. The most perfect cooling solution will not remove the need to do that.
March 17, 200917 yr I wish I could have those temps. My Seagate 1.5TB hovers around 51C when being used, with my WD Green 500GB drives being a little cooler at 48C. Outside temp right now is about 72F.
March 17, 200917 yr Author I wish I could have those temps. My Seagate 1.5TB hovers around 51C when being used, with my WD Green 500GB drives being a little cooler at 48C. Outside temp right now is about 72F. With a room temp of about 21C (if I did my quick conversion of F-C correctly), those are some high temps... You may want to check case airflow, etc (put fans in front of the drives if you don't already have them). One thing that my reading seems to make clear, you don't really want consistent temps over 50.
March 17, 200917 yr Some of the best forum discussions on air flow, fans, and temps: UnRAID Topical Index, Fans
March 17, 200917 yr Some of the best forum discussions on air flow, fans, and temps: UnRAID Topical Index, Fans RobJ - You are the wiki machine!!! Truly outstanding. Thank you so much. (Many thanks to prostuff1 as well for all the work on the hardware compatibliity page!) Forum members, don't forget to thank these guys occasionally. It's a heck of a lot of work!
March 20, 200917 yr Still on 4.3.3 but I thought I'd throw in my 2 cents. I've had some Samsung F1 750's for a while and recently added some Hitachi 1tb's. I had all of these stacked in a CM690 chassis and I was consistently in the mid 40c's on the Hitachi's and the high 20c's on the Samsungs. I just moved into a Norco RPC-450 and talk about a world of difference! With the 2 Hitachi's in one stack with some space around them and the F1's in the other stack right next to each other I'm now consistently around the high 20c's for the Hitachi's and high teens/low 20's for the F1's. Amazing difference what some space and airflow does!
March 21, 200917 yr All of my Samsung 750G & Seagate 1T drives don't go above 40C. My 750G Seagate (which has failed SMART test for months but still keeps on running) sometimes goes as high as 50C and my Seagate 250G cache drive can get in the mid 40's.
March 25, 200917 yr I have 7 500GB drives in a MD-1500/LL. When it was out in the open in a large room, temps maxed out at just under 40°C when in heavy use, around 30°C under normal use. I recently moved it into a medium sized closet to cut down on the ambient noise. Now temps max out around 50°C, and hover around 38°C under normal use. The outdoor temperature has been fluctuating a lot lately, so that we haven't permanently set the AC to run. Hopefully the closet will stay slightly cooler when we're more actively cooling the house. I could also probably improve temps slightly by spacing the drives out. Right now they are all installed sequentially right next to each other.
March 25, 200917 yr measure the ambient of the house and the closet. I think unRAID is probably just heating the whole closet
March 25, 200917 yr Author measure the ambient of the house and the closet. I think unRAID is probably just heating the whole closet I bet most of our unRaid boxes could double as space heaters
March 25, 200917 yr If you want to know about the temp of the drive, then you report the drive's temperature. If you want to measure "cooling", then you typically will report delta-T, the difference between the object(in this case the drive) and ambient. That gives you better apples-to-apples.
March 26, 200917 yr measure the ambient of the house and the closet. I think unRAID is probably just heating the whole closet I bet most of our unRaid boxes could double as space heaters My unRAID box wiht the duo core 2 and 3 120MM fans is cool. It's my workstation with Dual 3GHZ Xeons & FB-DIMM Ram or the one with dual 2.4Ghz xeons that heat the room up. You can feel the heat coming out the back fans. The drives on my unraid box are usually very close to Ambient temperature.
March 27, 200917 yr Most of my drive never get above the 37-38 mark under normal use. When running a parity check or a parity calculation my Seagate 750GB driver will get up to ~43 but not go much higher then that. That one Seagate drive that runs up to the 43 range is the one drive that runs the hottest (about 5C higher than the others).
March 30, 200917 yr measure the ambient of the house and the closet. I think unRAID is probably just heating the whole closet No doubt there. I can tell a difference whenever I go into the closet. It's not the ideal setup, but most of the time the server is idle so I don't really worry about overheating.
Archived
This topic is now archived and is closed to further replies.