Here's another couple shots of the Thecus, showing the serial connection, and an extra fan I added. These two are quieter than the original, but still pretty noisy.
And some other random info:
cat /proc/cpuinfo Processor : XScale-80219 rev 0 (v5l) BogoMIPS : 593.10 Features : swp half fastmult edsp CPU implementer : 0x69 CPU architecture: 5TE CPU variant : 0x0 CPU part : 0x2e3 CPU revision : 0 Cache type : undefined 5 Cache clean : undefined 5 Cache lockdown : undefined 5 Cache format : Harvard I size : 32768 I assoc : 32 I line length : 32 I sets : 32 D size : 32768 D assoc : 32 D line length : 32 D sets : 32 Hardware : Thecus N2100 Revision : 0000 Serial : 0000000000000000
I wish the fan regulator worked, or I wish I knew enough about electronics to slow down a fan a little bit. I'm sure it would have something to do with a resistor, but I dunno.
Cool! Martin included some info on controlling the fan, and it does have a gradient. I thought it was all or nothing. Right now, I've got my fans running at "80" out of 255, and they are practially inaudible. The drives are hovering around 41 degrees, but the cover is currently off. I'm going to put the cover back on in a minute and monitor the temp. Putting the cover back on will make it quieter too!
By the way, I used double sided tape to adhere a second fan to the front of the drives. That way I figure the air will blow through the channel between the drives where the the most heat is generated.
Here's my current temp:
194 Temperature_Celsius 0x0022 118 112 000 Old_age Always - 40
I should also note that the Thecus I'm currently working with is not under heavy load by any means. And some of my other settings:
noatime in fstab, installed laptop-mode-utils, and I think that's about it.
Some other thoughts:
I've been copying a large file over the network for about 10 minutes, and the temperature has gone up to 44 degrees. Still not bad at all. Also the cover has been on during this time.
20 minutes later and a 400MB file xferred the Thecus temp has risen higher than I've ever seen it. Its still rising slowly, and I'm hoping it will eventually stop and start decreasing. Currently it is at 49 degrees celcius.
Once if got up to 50 degrees, I sped up the fan to "120" out of 255 and the temperature dropped quickly. Its now at 39. Maybe I can find a midpoint in between 80 and 120 that is quiet but effective.
Again, here are the links to "the Thecus pages":
Nice thread at nchips livejournal about the Thecus and software porting: Allnet ALL6500: Next Debian/Arm porting machine? - I like the arrow pointing at the memory slot! :-)