[SOLVED] 516 gets "CPU temp exceeded safety threshold"

I went back to an old beta forum and found notes about setting minimum fan speed, but that was way back on 6.0.1... :) FWIW, the path for these was in /sys/class/hwmon/device, and below I've dumped the values from fan* and pwm*, if it's interesting or helpful to the inquiry.

fan1_alarm	0
fan1_input	823
fan1_min	0
fan1_pulses	2
fan1_target	0
fan1_tolerance	0
fan2_alarm	0
fan2_input	0
fan2_min	0
fan2_pulses	2
fan2_target	27000
fan2_tolerance	0
pwm1	3
pwm1_auto_point1_pwm	140
pwm1_auto_point1_temp	25000
pwm1_auto_point2_pwm	170
pwm1_auto_point2_temp	35000
pwm1_auto_point3_pwm	200
pwm1_auto_point3_temp	45000
pwm1_auto_point4_pwm	230
pwm1_auto_point4_temp	55000
pwm1_auto_point5_pwm	255
pwm1_auto_point5_temp	60000
pwm1_crit_temp_tolerance	0
pwm1_enable	1
pwm1_floor	1
pwm1_mode	1
pwm1_start	1
pwm1_step_down_time	1000
pwm1_step_up_time	1000
pwm1_stop_time	6000
pwm1_target_temp	0
pwm1_temp_sel	2
pwm1_temp_tolerance	0
pwm1_weight_duty_base	0
pwm1_weight_duty_step	0
pwm1_weight_temp_sel	1
pwm1_weight_temp_step	0
pwm1_weight_temp_step_base	0
pwm1_weight_temp_step_tol	0
pwm2	127
pwm2_auto_point1_pwm	140
pwm2_auto_point1_temp	40000
pwm2_auto_point2_pwm	170
pwm2_auto_point2_temp	50000
pwm2_auto_point3_pwm	200
pwm2_auto_point3_temp	60000
pwm2_auto_point4_pwm	230
pwm2_auto_point4_temp	70000
pwm2_auto_point5_pwm	255
pwm2_auto_point5_temp	75000
pwm2_crit_temp_tolerance	0
pwm2_enable	1
pwm2_floor	1
pwm2_mode	1
pwm2_start	1
pwm2_step_down_time	1000
pwm2_step_up_time	1000
pwm2_stop_time	6000
pwm2_target_temp	50000
pwm2_temp_sel	7
pwm2_temp_tolerance	0
pwm2_weight_duty_base	0
pwm2_weight_duty_step	0
pwm2_weight_temp_sel	1
pwm2_weight_temp_step	0
pwm2_weight_temp_step_base	0
pwm2_weight_temp_step_tol	0

Hi btaroli,

what about "/sys/devices/platform/coretemp.0/temp1_input" ?

Ki-Adi-Mundi wrote:
Hi btaroli, what about "/sys/devices/platform/coretemp.0/temp1_input" ?

It reports 34,000. FV says current CPU temp is 32C.

so box is not used for trancodes now. fan is adjusted in cycles, it may need some time to see fan speed up. The problem here might be the time is too long.

Correct, I didn't have any transcodes running just then. Just background PLEX, DVBLink, Transmission, et al. Tonight when I'm home I'll fire up a couple of transcodes, let it burn in for a few minutes, and take another measure then. :)

Which makes it unclear as to potential actions to take. Could this be a simple matter of config?

sorry, it's not a simple config can be changed easily. we will check this. thanks .

Thanks... The new 0.9.9.1 plex build came today. I have 5 streams running out of plex for 1080p content now and I can't get the temp over 71C. Mind you the fan is still ~800RPM, but at least I'm not running 86C and getting nasty warning emails about "I'm going to die soon!" ;)

I've left these five streams running since last post and the temp down in the mid-50's... C, of course... but still this is much more consistent with my experience with PLEX 0.9.8.18. Still wouldn't mind some variable fan love, but I can roll back to 0.9.9.0 to reliably test that. ;)



FWIW, the temp1_input values I probed early in the cycle, with CPU temp from FrontView, was:

69000 (63C)
71000 (70C)
70000
61000
71000
64000
70000
62000
52000
57000

Been a while! I've got a trip upcoming, so I'm taking advantage of offline transcoding and syncing to my mobile device with PLEX. This has renewed my interest in having better fan behavior in ROS6 (now 6.1.8).

Upon setting sync options for a couple of my favorite shows, PLEX has the CPU comfortably pegged at 320-350% CPU. :) But while ~800RPM fan speed is fine with the CPU is cool, this level of activity quickly causes temps to rise above 70C and then slowly up to 86C where the NAS starts sending alerts. In this time, the fan speed increased from 808 to a whopping 856.

Something is very wrong there.

I referred back to the beta forum and stepped up values of /sys/class/hwmon/hwmon1/device/pwm1 from 90, 100, 120, and finally 160... at which time the RPM hit about 2500 and I started to see CPU temp drop noticeably. Once temp hit about 70, fan was back down to about 1900 (and I'm sure still quite noisy, but I'm not there to hear it right now). But that still seems warm. So I bumped pwm1 to 190 and fan increased to ~2570 RPM, and temps began to recede to about 58C.

Generally the normal activity of my 516 allows for a nice, quiet 800RPM fan. Almost don't know it's there. But when CPU gets busy and the temps spike, it would be nice to know the fan can respond accordingly. What's the best way to ensure this happens?? I've never fully understood why this is such a challenge.

Can you try 6.1.9-RC8? See http://www.readynas.com/forum/viewtopic.php?f=154&t=72282

There are some fan control changes in 6.1.9.