ReadyNAS Ultra 6 Plus Fan Noise

Disk scrubbing puts the disks under heavy stress and would be expected to involve the fan running fast for a time.

I don't disagree with that statement. However, the fans don't go back to normal after the maintenance has finished. I let the ReadyNAS go for two days in this condition this time around, and the fans were still running at jet engine speed. There needs to be something that lets them go back to idle speed when the maintenance is finished.

David

Delanod, I assume that you haven't replaced the fans, pulled any fans out and reinstalled them backward, covered up the case vents, installed any fan-control addons, edited enclosure.db, etc. Is that a correct assumption?

What firmware version are you running?

When the fans are running "at jet engine speed", what temperatures do you see in the Health tab for the drives, the system, and the cpu? What RPM is shown for the fans?

Have you opened the case and blown the dust out of all three fans? (If you haven't and you want to, be careful when you blow out the dust not to spin the fan too quickly; over-revving a fan with compressed air is a quick way to kill its bearing.)

I have the firmware updated to the latest, whatever that is. RAIDar says 4.2.24. This is a fairly new unit, and I haven't modded anything on it. I don't think it's a dust or temperature issue, since it runs fine after a reboot. I'll have to check the temperature and speed when it goes into overdrive again, probably Sunday. Currently, the health parameters are:

Fan SYS 1188 RPM OK
Fan CPU 2280 RPM OK
Temp SYS 58 C / 136 F [Normal 0-65 C / 32-149 F] OK
Temp CPU 39.5 C / 103 F [Normal 0-85 C / 32-185 F]

The unit is currently as quiet as my desktop, which runs very quiet with temperature controlled fans, and an SSD that is noiseless.

David

Ok, please do post again when the fans are running fast. And please be sure to post disk temperatures in addition to the other two.

I will do that. And, just to get a record of it, the current disk temps are 36-39 C.

No problems today, so wait until next week. Here are the temps:

Disk 1 Seagate ST1000DM003-9YN162 931 GB , 35 C / 95 F , Write-cache ON OK
Disk 2 Seagate ST1000DM003-9YN162 931 GB , 36 C / 96 F , Write-cache ON OK
Disk 3 Seagate ST1000DM003-9YN162 931 GB , 35 C / 95 F , Write-cache ON OK
Disk 4 Seagate ST1000DM003-9YN162 931 GB , 39 C / 102 F , Write-cache ON OK
Disk 5 WDC WD30EFRX-68EUZN0 2794 GB , 39 C / 102 F , Write-cache ON OK
Disk 6 WDC WD30EFRX-68EUZN0 2794 GB , 37 C / 98 F , Write-cache ON OK
Fan SYS 1171 RPM OK
Fan CPU 2250 RPM OK
Temp SYS 58 C / 136 F [Normal 0-65 C / 32-149 F] OK
Temp CPU 39 C / 102 F [Normal 0-85 C / 32-185 F] OK

It took a while, but the problem appeared again today. The fan noise was way up this morning, but maintenance was not complete, so I ignored it. Now, however, the maintenance has been complete for about 10 hours and the fan noise is still up. Note that the CPU fan is running about twice the speed, and the CPU temperature is up.

Device Description Status
Disk 1 Seagate ST1000DM003-9YN162 931 GB , 39 C / 102 F , Write-cache ON OK
Disk 2 Seagate ST1000DM003-9YN162 931 GB , 42 C / 107 F , Write-cache ON OK
Disk 3 WDC WD30EFRX-68EUZN0 2794 GB , 42 C / 107 F , Write-cache ON OK
Disk 4 WDC WD30EFRX-68EUZN0 2794 GB , 41 C / 105 F , Write-cache ON OK
Disk 5 WDC WD30EFRX-68EUZN0 2794 GB , 40 C / 104 F , Write-cache ON OK
Disk 6 WDC WD30EFRX-68EUZN0 2794 GB , 38 C / 100 F , Write-cache ON OK
Fan SYS 1250 RPM OK
Fan CPU 4560 RPM OK
Temp SYS 58 C / 136 F [Normal 0-65 C / 32-149 F] OK
Temp CPU 50.5 C / 122 F [Normal 0-85 C / 32-185 F] OK
UPS 1 Not present NA

So, the fan is cooling as it should, but something is driving the CPU temperature up. Is there any way to tell what is running that might be causing excessive CPU usage?

David

delanod wrote:
something is driving the CPU temperature up. Is there any way to tell what is running that might be causing excessive CPU usage?

If you have SSH access to the NAS, you can use the "top" command to see a list of running processes sorted by CPU usage.

Do I need to have something installed on the NAS to have SSH access?