ReadyNas Ultra 6 Plus keeps rebooting randomly

Hi there,

I cannot remember if I mention or posted this before, apologies if I did but I am still having the following issues. I have 3 readynas ultra 6's of which one is a plus and is the one with the issue.

The issue seems to occur randomly but most of the time I see messages saying the system fan is running below threshold. I recently changed the fan to the one that was recommended and this was all working fine but I still get the issue and recently saw it saying that the below threshold was shoing as 0 rpm. I went down to the Nas and could see that the system fan was not spinning at all. A rebootof the nas resolved it and it was spinning again.

I am seeing the NAS reboot itself from time to time - especially if I am writing to the NAS. The rpm of the system fan drops drastically - sometimes it will continue to work even on the low spin (800 rpm) and then regain speed back up to 1200 rpm. then somtimes if it drops or maybe not at all but something would cause it to reboot. 9 times out of 10 after rebooting it has to carry out a data resync which is time consuming but does not stop any data being writing etc but takes longer.

My question is other than having the system fan changed what else can cause it and how can i fix it. Please any elp would be greatful.

It is a readyNAS Ultra 6 Plus as I said running OS 6.10.4 Hotfix 1 and has 4 x 3TB WD Red drives running X-RAID 5 and capacity is currently at 6.26TB free out of 8.17TB.

Any help would be hugely appreciated - I have 2 other NAS Ultra 6's (not Plus) and they are all working fine and I have a RN104 working fine.

TIA

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Sandshark
Sensei
Apr 21, 2021
For the fan issue, try this from SSH:

# echo 1000 > /etc/frontview/min_fan_speed_override # systemctl restart readynasd
For the restarts, it may be because the fan is not running and the unit gets too hot. So see if it's fixed by the above first. If it's not, you could have a failing power supply.
- niallryan
  Guide
  Apr 22, 2021
  Hi and many thanks for the reply.
  
  I logged into the NAS to make sure everything was ok but in actual fact it was carrying out a re-sync. So it must have restarted during the night - looking at the logs it indeed did - seemingly several times and the NAS was not being used but running in idle. See screenshot of the logs - time is in GMT (0.00)
  - niallryan
    Guide
    Apr 22, 2021
    Apologies meant to add, is it safe to continue with the commands you stated ?
    
    Or is it something else - I have read that people have mentioned a temp sensor failure or indeed a power supply failure.
    
    Regards