HDD fan spinning at 5500rpm!!

Discussion in 'iMac' started by mtnDewFTW, Apr 30, 2010.

  1. mtnDewFTW macrumors 6502a

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    #1
    what's going on?!
    I just got my HDD replaced, because I got a crappy loud Seagate before, and now it sounds like a freaking airplane!

    What's going on?! And is there a fix for this?

    EDIT: I shut down the computer for a few minutes and started it up again. Not as loud, but the fan is now spinning at 2800rpm.

    This can't be normal.. and it definitely wasn't like this before.
     
  2. spinnerlys Guest

    spinnerlys

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    #2
    How do you monitor the RPM of the HDD platters? Or do you mean the fan speed? Have you any fan control software installed? What temperature does the HDD have?

    And what specific HDD do you have?
     
  3. mtnDewFTW thread starter macrumors 6502a

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    #3
    I'm sorry, that was my mistake. I meant to say the HDD fan.
    I have istat pro installed and that told me the speed of it.
    It's spinning at 2800rpm+ right now.
    the HDD temp is 110 F

    I just finished installing my OS back from TM, so that might be why it's so hot, it's been writing for about an hour now, of not more.
     
  4. spinnerlys Guest

    spinnerlys

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    #4
    That's 43°C, that's more than normal, my HDD currently has 52°C (125.6 F) with normal load (1.5MB/s). Do you have iStat Menus 3 or any other kind of fan control software installed? Because my HDD fan spins at 1293 RPM.
    But I have a 2007 Aluminium iMac, so that might not be a proper comparison.
     
  5. mtnDewFTW thread starter macrumors 6502a

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    #5
    No, I don't have any fan controllers installed. Just this one that tells me how fast it's going. I'm on the phone with AppleCare right now, and the guy isn't telling me much.

    I already restarted it 3 times, and the fan basically stars at 2k and keeps getting faster and faster, but the HDD temp stays the same.

    I have no idea what do to.
     
  6. spinnerlys Guest

    spinnerlys

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    #6
    Maybe you can circumvent that by using SMC Fan Control, as you can manually set the fan speeds of each fan.
     
  7. mtnDewFTW thread starter macrumors 6502a

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    #7
    I don't think I should be controlling them. Just because there might be something that needs to be cooled down, and I don't wanna screw up the whole system by slowing down the fans.

    ugh this is so odd!
     
  8. i7QuadCoreMania macrumors 6502

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    Nov 10, 2009
    #8
    the culprit here is the temp sensor most likey.

    who did the replacement? you did it yourself? or the apple store?

    if seagate what did they replace it with? the seagate and WD ones are not one for one replacements from what I hear cause the sensor connectors are different.
     
  9. mtnDewFTW thread starter macrumors 6502a

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    #9
    Nope, I didn't do it. I called Apple and they did a on sight replacement.
    They replaced the Seagate with a Hitachi.
    Anyway, so I called AppleCare and the guy there told me that I'd have to take it to the Apple Store to get it checked up. Thankfully I remember the repair guys name/workplace. I called them and they gave me his cell number. He said he'd swing by on Monday and check it out. He said that most likely something's wrong with the chord, or it's not connected well, so therefor the iMac is basically protecting itself against overheating by blowing the fans max speed.

    Either way, I just gotta deal with a jet-sounding computer until monday and then he'll come and (hopefully) fix it.
     
  10. WilliamG macrumors G3

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    #10
    Sounds like the dummy didn't reconnect the temp sensor to the new hard drive. That's what causes the fan to speed up like that.
     
  11. mtnDewFTW thread starter macrumors 6502a

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    #11
    He was a really nice guy. He talked A LOT though, so I'm not surprised he left that out.

    Anyway, I installed SMC Fan Control and it won't let me control any of the fans.. Am I doing something wrong?
    I opened the preferences panel and set the RPM to 1300. And it's still at 4500 and keeps going up
     
  12. Richdave macrumors member

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    #12
    yeah seems most likely cause
     
  13. mtnDewFTW thread starter macrumors 6502a

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    #13
    that would make perfect sense, except for one thing. I can see the temp of the HDD in iStat.
     
  14. i7QuadCoreMania macrumors 6502

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    #14
    well, lets put it this way, the only thing that was changed was the hard drive swap, so either way something went wrong with that swap otherwise you wouldn't be sitting here in this forum.:rolleyes:
     
  15. CJS7070 macrumors 6502a

    CJS7070

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  16. mtnDewFTW thread starter macrumors 6502a

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    #16
    haha well that's very true. It just seems very weird how I can see the temp of the HDD, and yet the fans are going crazy.

    lol at least my computer has never been this cool, so that's a good thing.
     
  17. Richdave macrumors member

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    #17
    re reading your earlier posts..

    110F is hardly HOT! that's only 43C and the 2800rpm does seem a little fast for this temp, the max speed for the fan is around 5000.

    Have you reset the SMC?

    ,
     
  18. mtnDewFTW thread starter macrumors 6502a

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    #18
    Actually, I should make a correction there. It starts at around 2800 and gets faster and faster. within 5 minutes it's at 5344. I'm guessing that's the max.

    How do I reset it?
     
  19. Richdave macrumors member

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    #19

    Apple.com
     
  20. mtnDewFTW thread starter macrumors 6502a

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    #20
    So.. the on sight repair man stopped by my house again, took apart my computer to check all the wires and said that everything's in its perfect place.

    Called Apple and they're sending out a new Logic Board for him to install on my computer.

    Even though the problem started after the HDD install.

    Hopefully this will fix everything. I'm REALLY tired of my computer being louder than the speakers that are built into it.
     
  21. i7QuadCoreMania macrumors 6502

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    #21
    I really dont understand here, so the original problem was the hard drive was noisy, yet you didn't have fan problems, the repair guy goes and replaces the drive from Seagate to Hitachi and the fans go wild (literally):p

    Now he says the logicboard is bad, the only way how I see the board being bad is he screwed up something with the drive replacement.

    I have an idea, why not put the original seagate drive back in and see if the fans ramp up again?:rolleyes:then again I'm not the repair guy.
     
  22. mtnDewFTW thread starter macrumors 6502a

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    #22
    Surprisingly, it worked. The fans are back to normal. Actually they used to always be under 1k, but now they're a bit over (1100rpm). but I'm not complaining.

    Looks like the logic board was the problem. Still don't get how, but whatever.
     
  23. WilliamG macrumors G3

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    Seattle
    #23
    If your iMac is the same as everyone else's iMac 27", your HD fan is ~1119rpm.
     

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