January 2, 201016 yr My unRaid consists of a COOLER MASTER Centurion 590 Case with COOLER MASTER 4-in-3 cages. Most of the time only a few drives are spun up at once, but I notice the drive temps get fairly warm when the monthly parity check runs. There is no rear fan installed, but put a 120mm fan in one of the top vents closest to the front of the case (not much affect). I'm wondering if I should be concerned or not worry. The only thing I can thing of to do is seal up the vents on the side and put a fan in the rear (maybe another one on top). This would channel the air away from the drives. Any constructive comments would be welcomed
January 2, 201016 yr The drives that are in the 50's are to hot, as far as I am concerned. The hottest drive I have in my system is a Seagate 750GB drive and it tops out at MAX 45C when doing a parity check, and it typically hovers around the 42C range during a check. This is with some of these to hold the drives. They could be improved upon actually but I have not taken the time to "cut" into them.
January 2, 201016 yr Those seagate drives do run hot, mine get upto 44 deg C during parity. In orde to keep the disks cool you need air flowing into the case then across the disks and out of the case or the same but in reverse. I suspect having a fan at the top of the case all you are doing is sucking hot air into the case and the PSU is then blowing that same cool air out of the case. Apologies for the ascii art. Below is probably what your computer cases layout does now and below that is something like what you actually what you want... ____________________ | | ___| F|| | | / | F|| | PSU | <------ | F|| |____ | \ __ | F|| | || | ______|| | | || | | HDD || | | || |______________|_____|| ___________________ | | | | | PSU | <--- | | |____ | \ | | |F| <----| | | |F| | ______| | |F| <--- | | |F|<--- | \ _ | HDD |F|<--- | | |F|<--- |______________|_____|F|<---
January 2, 201016 yr If you have trouble with that artwork - Note that it is drawing the incoming air over the drives. It make a huge difference 7-10C on my antec 300 especially when I closed up the giant hole on the side of the case. This forced all airflow across the hard disks and out the fans and psu. Just opening your case doesn't make airflow happen. Like breathing, there should be an in and an out otherwise you're just beating up the air.
January 2, 201016 yr I had similar problems with my Centurion 590. They are all solved now, and I this thread and the helpful posters to thank for it: http://lime-technology.com/forum/index.php?topic=2067.0 You may want to go through it for lots of tips.
January 7, 201016 yr Author Thank you for the great replys (and ascii art). I ran a short SMART test (report attached) on the disabled disk and everything passed. I didn't see anything in the syslog that stood out either. I was using fan splitter cables to be able to connect more than one fan to a single system fan controller on the MB. I had 3 fans and my MB only had 2 [system] connectors. I noticed that one fan was running around 700rpm when I know the CM cages have 1200rpm fans. The problem was the SMART system fan setting in the BIOS was enabled. This lowered those fans because the sensors were reading the case temperature. I disabled this and rebooted and the fan speeds read around 1190rpm. I taped up the top vents and both side panels and added a 1900rpm fan to the back (there was not one before). I decided to go with the "Trust my array". I started the parity check and my temps are much better now (see pic). So far so good. My PSU fan is currently facing up and I'm debating about flipping, but there is very little heat coming off it. The PSU fan cable is not attached to the MB (I don't think it has one). Fitbrit: I'd like to see some of your rig pics
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