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  1. #1

    Member Since
    Feb 03, 2008
    27 imac hd rumbing sound
    Apple replaced my 24" imac after they couldn't solve a problem with the display. They gave me a brand new 27 inch iMac with a 3.2 i3 and a 1 tb hd. I'm hearing a soft rumbling sound from the drive, maybe every 10 to 15 seconds (maybe longer sometimes) It also makes the noise when opening up an application.

    Is this normal? I've only had it today (as I write this post) and was wondering how many others have had this. The machine is wonderful otherwise. But I don't have this problem with my MB Pro or my old 24" machine -- that was as quiet as a churchmouse.

    The noise, as I said, is soft and not particularly annoying (at least not yet) But I'd really like to see if there's a problem. I went into the "about this mac" and looked up the serial ATA and saw that the model is ST31000528AS. Can anyone tell me about this (brand, etc)

  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Keller, Texas
    2017 27" iMac, 10.5" iPad Pro, iPhone 6s+, iPhone 7+, Numerous iPods, High Sierra
    Congratulations on getting a new 27" iMac in place of your 24" model. That was quite a swap! Regarding the rumbling you hear, it may be normal. The 1TB drives have more platters closer together than most drives and may be a bit noisier. Live with it for awhile and if it gets worse or begins to annoy you, take it on in to Apple and let them look at it. Make sure you keep your backups up to date just in case.

  3. #3

    trademark's Avatar
    Member Since
    Apr 17, 2007
    i7 iMac; 8gb DDR3 ram; ati mobility 4850; 1tb seagate harddrive @7200rpm
    That is normal from hard drives-- they are a mechanical moving part afterall. It is likely that you're hearing it only now because it's a large capacity workstation class hard-drive embedded in a unibody all aluminum chassis that would only amplify the noise.

  4. #4

    Raz0rEdge's Avatar
    Member Since
    Jul 17, 2009
    27" i7 iMac, 15" Macbook Pro TB, 13" Macbook Air, iPhone 6S, iPod Nano 7th Gen
    That's the HD doing it's work and completely normal..the sound should be fairly subtle and infrequent (unless you're doing something that specifically has to write to the HD)..


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