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Fan noise

Discussion in 'Cisco/Linksys Network Storage Devices' started by dpackham, Sep 19, 2008.

  1. dpackham

    dpackham Addicted to LI Member

    brand new NAS200 and the fan is pretty loud. and sounds off balance.. anyone else hear this?

    Dave P
     
  2. dpackham

    dpackham Addicted to LI Member

    66 reads and nobody can say.. "mine is quiet" or " mine sucks like a 747"

    anything :)

    Dave
     
  3. Rooki

    Rooki Network Guru Member

  4. jac_goudsmit

    jac_goudsmit Super Moderator Staff Member Member

    Less than 2 hours and he's already running out of patience ;)

    There have been various reports about people who have loud fans in their NAS200. Personally I was more concerned about the effectiveness of the tiny little fan. Replacing it with a bigger one not only made my NAS200 quiter, it also keeps my disks cooler.

    [​IMG]

    The picture is of a different fan than I have right now. After I took the picture I got a thin 50mm fan at Fry's which fits better than this one. I had to dremel some plastic away between the two disk compartments and I had to drill through all the holes on the side. My fan has two harddisk style molex power connectors that I connected between the motherboard and the harddisk power cord; that way the fan runs all the time but at least I won't fry any transistor on the motherboard; Later on I will look into adding a transistor myself to let the mobo control the fan.

    ===Jac
     
  5. dpackham

    dpackham Addicted to LI Member

    9-19 to 9-25 is a bit more than 2 hours :)

    just kidding. I took it back to the place I got it and they said that they dont stock it anymore beacuse of too many returns.. now I need to find a new one
     
  6. alejandro_liu

    alejandro_liu Addicted to LI Member

    I myself agree with the original poster, the fan is too loud. It is louder than my Desktop.

    So I have hacked my Firmware so I can now shut down the drives after 5 minutes and the fan shuts off 10 minutes after.

    On the other hand, looking at the temperature (even with the fan off) the fan is quite ineffective. The sensor in the HD reports the following temperatures:

    Code:
    Top drive: 45, (44 Airflow)
    Bottom drive: 41 (40 Airflow)
    Temperature can be obtained once you log in by telnet or ssh to your box (assumes that you have a hacked firmware) and using the command:

    Code:
    smartctl -a /dev/sda | grep Temp
    for the top

    Code:
    smartctl -a /dev/sdb | grep Temp
    for the bottom.

    Maybe I should check what happen if I just shot of the fan... if the temperature is the same I am just sucking air for nothing...
     
  7. EgyptianPrince

    EgyptianPrince Addicted to LI Member

    Very noisy, I had to get it out of the room... sounds like another computer is running
     
  8. jackito

    jackito LI Guru Member

    Me too, its very disturbing specially when you have the NAS200 at the living room and try to stream a movie at night with all the house in silence.
    As a workaround Im turning the fan off every 60 secs. But it´s not a solution since the NAS is starting the fan again inmediatelly after a very little access to the harddisks but at least it helps to "keep it" quiet for a long time since you don´t have to wait for 20 mins after the last access for it to silence.
    Of course, you can always replace the fan (Jac did it, search for the info in the forum) or try to get a replacement NAS200 from your store and hope that the new one will be quiet enough...
    Linksys really did some mistakes with the hardware of this slowww and noisy NAS...
     
  9. mdsilva

    mdsilva Addicted to LI Member

    Hi, I've been working on a script that turns off the fan if the temp of the drives is less than a setable tempreature. I've managed to make it work and i run it once every minute from cron. My problem is that once the fan is turned off (using Set_Led) after a few seconds something else seems to turn it back on. Does anyone know what is turning on te fan? can that be disabled?

    MD

    PS: If this works, I'll upload the scripts so everyone can turn off the fan when its not needed.
     
  10. psychowood

    psychowood LI Guru Member

    AFAIK the NAS200 kernel turns on the fan automatically after a certain number of disk accesses, ignoring the fan_off command. If I recall correctly someone (Jac? I'm not sure) said that it's a parameter hard-coded in a Linksys proprietary part of the firmware (i.e. something you can't edit-and-recompile).
     
  11. jackito

    jackito LI Guru Member

    You are right. It´s coded in the "custom" Linksys kernel I think, and it´s very annoying since it can´t be skipped unless you search and change that code. :frown:
     
  12. DaveMcLain

    DaveMcLain Network Guru Member

    For what it's worth my NAS200 is not overly noisy because I have next to my router in my basement storage room. That's one of the nice things about having a network attached drive being able to place it anywhere in the house.
     

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