Unfortunately no one can be told what fun_plug is - you have to see it for yourself.
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Hi all!
After have read all the topics concerning the temperature and the fan on DNS-323 I still cant figure out what temperatures are safe for the device.
The fan control script I use is the one from wiki. It suggests T1 and T2 43C and 60C respectively. However, my device works at 45C when idle (the disks are spinned down) and 48C when working.
That means that the fan never stops. I wonder whether its safe to raise the T1 value in order to make the fan stop. However there is a risk that if I raise the T1 value the idle temperature will rise too which will trigger the fan anyway.
How do you people do? As I've read at the forums many of you have idle temperatures above 43C. Have you managed to master the fan?
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mine runs 24-7, most of the time at 37C. but i made the fan hack. check it at http://members.chello.sk/ondro727/
Last edited by assuncap (2008-03-24 16:50:13)
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Thank you assuncap for your reply. Yes I know that many people have lower idle temperatures than I do. I'm not sure what it depends on. I have regular room temperature 22C or something. It can depend on the disks but I'm not sure. I have regular Seagate Barracuda 320GB SATA II 7200rpm 16MB. Of course, if you saw a hole in the back the device it might be cooler.
Yes, I've seen the tutorial you've linked to on the wiki. However, I'm not interested to modify the hardware. Not yet anyway. :-) I would rather find a software solution to make the fan go idle.
My question remains. Is there anybody out there who succeeded to make the fan stop when the disks are idle even if you have pretty high temperature (45C in my case).
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Unless you physically reduce the idle temperature some other way, I'm afraid what you see is what your get as far as fan speed control is concerned. It's some simple math, and there really isn't any rocket science here.
My suggestion is to experiment a little and come up with a set of values you can live with.
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Thank you for your reply blahsome. Yes I can play around with the values in the script. However I don't know how high temperature is safe for the device. Besides, somebody may be have already had a similar problem (I've read that many people have high idle temperatures) and is willing to share the solution.
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timofej wrote:
Thank you for your reply blahsome. Yes I can play around with the values in the script. However I don't know how high temperature is safe for the device. Besides, somebody may be have already had a similar problem (I've read that many people have high idle temperatures) and is willing to share the solution.
There is no specific number as to the "safe" temperature. It all depends on the drives you're using. Specifically, some drives can handle high temperatures well, and some not. Further, the same drives from the same manufacturer can also behave differently depending the batch and when they were produced.
If you're concerned about lifetime of your drives, leave the fun running. If you're more about quiet environment, but shortening the drive lifetime, leave the fan off. But once again, the numbers and settings depend on the hard drives and you can usually experiment and later check SMART stats to see where you drive is at.
-- Andrey
Last edited by andrey (2008-03-27 20:28:08)
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andrey wrote:
There is no specific number as to the "safe" temperature. It all depends on the drives you're using. Specifically, some drives can handle high temperatures well, and some not. Further, the same drives from the same manufacturer can also behave differently depending the batch and when they were produced.
If you're concerned about lifetime of your drives, leave the fun running. If you're more about quiet environment, but shortening the drive lifetime, leave the fan off. But once again, the numbers and settings depend on the hard drives and you can usually experiment and later check SMART stats to see where you drive is at.
-- Andrey
Thank you Andrey for your reply. I see your point. It makes sense. However, I wonder whether the other electronics can be damaged by high temperatures. I can live with changing disks once in a while but if the whole device goes down the problem would be much more severe.
My DNS-323 is placed i the bedroom (I know not the best place, but I don't have other place for it). That's why I want eliminate all unnecessary noise. Btw it seems that this is not the fan that makes noise but the rest of the electronics even when the disks are spinned down. Weird, I can be wrong on this point because I can hardly imagine that electronics can make noise if it doesn't have moving parts.
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Electronics, especially high power electronics, can create audible noise even without moving parts, however, I don't think that's really likely with the electronics in the DNS-323 - for what it's worth, and maybe my DNS-323 is from an earlier generation (I've had it a little over fifteen months now) but I've had no problems with fan noise, and have very few concerns about idle and/or running temperature. I've cooked a few drives in my time, especially SCSI drives, but the temperatures in this unit appear to be acceptable to me, both for the drives and the electronics.
The only time I hear the fan is very briefly at boot up (or if I run it with the front panel off) and my idle temp is 46*C/115*F, sustained use - well at the end of an hour actively transferring files to a RAID1 array it's 47*C/116*F, with the highest observed reading at 50*C/122*F, ambient is approximately 32*C, somewhere in the high 80*F.
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