Results 1 to 8 of 8
  1. #1
    iMac noise every 20min

    Member Since
    Mar 30, 2008
    Posts
    7
    iMac noise every 20min
    For some reason my iMac G4 (1.25GHz, 20-inch) makes a buzzing sound (approx.) every 20 minutes and 5 seconds. The noise is coming from its half-sphere base and lasts anywhere from 2 to 5 seconds. It seems to me that the source might be the internal HD, however I'm not 100% sure about that. The fact that the noise occurs in 20-min intervals makes me think that there is some sort of background operation going on.

    Has anyone had such experience? If not, then how could I figure out the actual source of the noise.

    Thank you.

  2. #2
    iMac noise every 20min
    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    20,061
    Specs:
    iMac i5 2.7GHz, 16GB memory, OS 10.10.5
    Go to Disk Utility and see what S.M.A.R.T. verified has to say. If it says failing, time for a new HDD.

  3. #3
    iMac noise every 20min

    Member Since
    Mar 30, 2008
    Posts
    7
    harryb2448, thank you for replying.

    I went to Disk Utility and the S.M.A.R.T. Status reads "Verified." Then I ran "Verify Disk" and according to the verification report pasted below the volume seems to be fine; I should mention here that I began the "Verify Disk" process right before the noise was due to come up; interestingly the noise did not come up as expected while the "Verify Disk" process was going on.

    Any other ideas?

    ------------------------------------------------------
    Verifying volume “untitled”
    Checking HFS Plus volume.
    Checking Extents Overflow file.
    Checking Catalog file.
    Checking multi-linked files.
    Checking Catalog hierarchy.
    %)
    Checking Extended Attributes file.
    Checking volume bitmap.
    Checking volume information.
    The volume untitled appears to be OK.
    Mounting Disk

    1 HFS volume checked
    Volume passed verification
    --------------------------------------------------------

  4. #4
    iMac noise every 20min
    mac57's Avatar
    Member Since
    Apr 29, 2006
    Location
    St. Somewhere
    Posts
    4,560
    Specs:
    iMac 27" 3.4 GHz, 256 GB SSD, 2 TB HDD, 8 GB RAM
    I think it is the SMART testing. Depending on the loudness of the buzz you are describing, I wouldn't be worried. My G5 does the same thing, and has for the entire time I have had it. It is annoying from time to time, but at this point, I just tune it out.
    My Macs: iMac 27" 3.4 GHz, Mac Pro 3.2 GHz, PowerMac G5 Quad 2.5 GHz, G4 Cube with 1.2 GHz Upgrade
    My iStuff: 64GB iPhone 5, 64GB iPad4, 30GB iPod Video, 16GB iPod Touch
    My OS': Mac OS X Lion, Mac OS X Snow Leopard, Mac OS X Tiger, Mac OS 9.2.2, openSUSE 10.3
    I was on the Mac-Forums honor roll for September 2007

  5. #5
    iMac noise every 20min

    Member Since
    Mar 30, 2008
    Posts
    7
    mac57, I'm hoping you're right. What you're suggesting makes sense given that S.M.A.R.T. is supposed to be a HD's background self-checking operation which I'm assuming runs in time intervals. Thank you for replying.

    Now is there a way to get a S.M.A.R.T. status icon or something similar on my Menu Bar or my Desktop so I wouldn't have to open Disk Utility every time I need to check its status?

  6. #6
    iMac noise every 20min
    mac57's Avatar
    Member Since
    Apr 29, 2006
    Location
    St. Somewhere
    Posts
    4,560
    Specs:
    iMac 27" 3.4 GHz, 256 GB SSD, 2 TB HDD, 8 GB RAM
    Quote Originally Posted by macnet View Post
    Now is there a way to get a S.M.A.R.T. status icon or something similar on my Menu Bar or my Desktop so I wouldn't have to open Disk Utility every time I need to check its status?
    I'm afraid that I am not aware of any way to do that. Anyone else?
    My Macs: iMac 27" 3.4 GHz, Mac Pro 3.2 GHz, PowerMac G5 Quad 2.5 GHz, G4 Cube with 1.2 GHz Upgrade
    My iStuff: 64GB iPhone 5, 64GB iPad4, 30GB iPod Video, 16GB iPod Touch
    My OS': Mac OS X Lion, Mac OS X Snow Leopard, Mac OS X Tiger, Mac OS 9.2.2, openSUSE 10.3
    I was on the Mac-Forums honor roll for September 2007

  7. #7
    iMac noise every 20min
    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    20,061
    Specs:
    iMac i5 2.7GHz, 16GB memory, OS 10.10.5
    just a thought macnet - do you have DiskWarrior installed by c hanve?

    There is an option to automatically run SMART verified with that program . Maybe there are others also?

  8. #8
    iMac noise every 20min

    Member Since
    Jun 21, 2008
    Posts
    56
    go back to apple
     24" Aluminum iMac, 2.8GHz Intel Core 2 Duo
    2GB memory  13.3-inch: 2.4 GHZ white MacBook

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. iMac noise?
    By jppv in forum Switcher Hangout
    Replies: 1
    Last Post: 03-24-2012, 11:47 PM
  2. iMac Noise
    By polakbob in forum Apple Desktops
    Replies: 0
    Last Post: 11-12-2009, 09:06 AM
  3. Fan noise new iMac?
    By jennymac in forum Switcher Hangout
    Replies: 12
    Last Post: 07-18-2008, 05:03 AM
  4. New iMac w/crackling noise
    By Dice-K in forum Switcher Hangout
    Replies: 5
    Last Post: 04-25-2007, 01:46 PM
  5. G5 iMac 'noise'...
    By pod in forum Apple Desktops
    Replies: 2
    Last Post: 05-05-2005, 07:13 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •