SAS hard drive noisy only on cMP

Discussion in 'Mac Pro' started by LapplandsCohan, Mar 11, 2018.

  1. LapplandsCohan macrumors newbie

    LapplandsCohan

    Joined:
    Dec 10, 2017
    Location:
    Sweden
    #1
    I bought 2 Seagate ST8000NM0075 to have in my Mac Pro 5,1. They are hooked up to a Areca 1882i through the MaxUpgrades MaxConnect BackPlane Attachment (pin 3 on the sled desoldered to solve the startup problem.)
    One drive is manufactured dec 2017 and is fast and quiet. The other drive is manufactured jan 2017 (previous generation with different label) and is fast but noisy as hell, but only in my Mac Pro! If I take the drive and put in my HP Z620, the drive is fast and as quiet as the newer one, even if I move the SAS RAID card to the HP so that I use the exact same controller card!

    Has anyone experienced this and have a solution?

    Sound samples:
    (Files will be available for 30 days)
     
  2. ApfelKuchen macrumors 68030

    Joined:
    Aug 28, 2012
    Location:
    Between the coasts
    #2
    Could it be mechanical vibration of the sled/sled-related hardware, rather than just the drive? Have you swapped the position of those two drives? Have you swapped the two sleds?
     
  3. AidenShaw, Mar 11, 2018
    Last edited: Mar 11, 2018

    AidenShaw macrumors P6

    AidenShaw

    Joined:
    Feb 8, 2003
    Location:
    The Peninsula
    #3
    Assuming that drive 2 is noisy when drive 1 is removed, it's probably not a vibration issue. (The loudest noises can come from the sound from multiple drives "beating".)

    What does S.M.A.R.T. say about the drive - any unusual recalibration or error counters?

    I listened to the sound files - is the noise like the sound of a train whistle on drive 2? Could that be an alarm from the controller? (The controller has a small loudspeaker to warn of errors.)
     
  4. LapplandsCohan thread starter macrumors newbie

    LapplandsCohan

    Joined:
    Dec 10, 2017
    Location:
    Sweden
    #4
    Mechanical vibration was my first guess, but I have changed positions, changed sleds, and even pressed my hand to the drive to make sure it wasn't causing vibration noise to no effect.

    It's not the alarm from the controller. That sounds every startup just to let you know it is still working and is even worse!

    Will have to get back to you on the S.M.A.R.T. status.
     

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3 March 11, 2018