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Supertramp11's avatar
Supertramp11
Luminary
May 03, 2016
Solved

Fan System in enclosure Internal speed is below threshold. (0 rpm) #26821415

Hi,   After having successfully used my ReadyNAS PRO 6 with OS 6.4.2, today I started to received the following allert message: Fan System in enclosure Internal speed is below threshold. (0 rpm)....
ReadyNAS OS 6 on Legacy models
  • mdgm-ntgr's avatar
    mdgm-ntgr
    May 18, 2016

    Seems to be working O.K. since I updated it to 6.5.0. Can you confirm?

StephenB's avatar
StephenB
Guru - Experienced User
May 04, 2016
Danthem wrote:

I'd probably try downgrading the firmware to 4 first to make sure there really is a hardware issue. 

I was assuming that support had confirmed that already.  If not, I agree that is a good next step.

Supertramp11's avatar
Supertramp11
Luminary
May 04, 2016

First of all: thanks to all for your replies.

 

I decided to take your advice to go for an RMA and prepared my NAS to downgrade from OS 6.4.2 to OS 4:

- switched the NAS off

- took out the disks and labeled them with their number

- prepared a scratch disk and put it in the the NAS

- switched the NAS back on which gave an error and told me to go to RAIDar

- after starting RAIDar it told me that the disk needed formatting which I started entering the word DESTROY

- in the next few minutes, it copied the FW.

 

All of the above happened with both fans spinning relatively fast.

 

After half an hour the fans have calmed down again - and now the weird part - the system fan spins at the usual speed of 907 rpm !!!

 

Does anyone have an explanation why with my normal disks, the system fan is dead where now with the scratch disk it works as it did before... all of this using the exact same OS 6.4.2 ???

 

For now I'm concluding that the system fan is not broken i.e. I don't want to RMA my NAS yet. Thanks for any help.

  • mdgm-ntgr's avatar
    mdgm-ntgr
    NETGEAR Employee Retired
    May 05, 2016

    Can you provide your logs zip file (either attach them to your case or send them to me)?

    • Supertramp11's avatar
      Supertramp11
      Luminary
      May 05, 2016

      Hi mdgm,

      Thanks for your support. I sent you the logs.

       

      • mdgm-ntgr's avatar
        mdgm-ntgr
        NETGEAR Employee Retired
        May 06, 2016

        This would seem to suggest that the NAS is expecting the fan to be somewhere different to where it is on your system. So you might be able to override the sensors config or connect the fan to the sensor it is expected to be at.

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