Windows 10: How To Identify Cause of 100% Disk Usage?

Discus and support How To Identify Cause of 100% Disk Usage? in Windows 10 Performance & Maintenance to solve the problem; I have a win10 machine that keeps slowing down drastically and when I check with Task Manager I see there's 100% system disk usage. And I can't figure... Discussion in 'Windows 10 Performance & Maintenance' started by abrogard, May 12, 2018.

  1. ABROGARD
    abrogard Win User

    How To Identify Cause of 100% Disk Usage?


    I have a win10 machine that keeps slowing down drastically and when I check with Task Manager I see there's 100% system disk usage.

    And I can't figure out what is causing it.

    And I can't understand how it could be that important that is would slow the machine.

    100% usage simply means that the disk is being accessed all the time doesn't it? That's all. It gets no rest.

    But CPU usage is fairly minimal. 97% idle time. Disk transfer rate is low.

    So I figure it must be something that can't operate unless it can access the disk and it simply can't access the disk.

    But all I am doing is browsing web pages. Reading them. Forum posts usually. And I might write a post. Not disk intensive activities.

    I look for I/O and page faults and find Firefox and Avira to be most heavy.

    Is there any way to identify which processes and therefore which applications are being delayed?

    I've got two machines with win10 and each set up pretty much the same and each used in about the same way.

    This one here now never gets this problem. That other one I've had endless problems with. It's an Asus H170 pro gamer. This one is an Asus H61-MK. Both Asus, see? Even that much similar.

    :)
     
    abrogard, May 12, 2018
    #1
  2. ML5
    ML5 Win User

    Windows 10 causes 100% disk utilization

    The fix outlined in the article did Not fix the 100% disk utilization. I cannot tell any difference in performance and disk usage still stays at 100%.

    The fix ask you to verify which driver is used for, mine is not the one listed. ASUS uses a driver called "iaStorA.sys" but I made the MSI change anyway. Plan on resetting it since it appears to make no difference.
     
    ML5, May 16, 2018
    #2
  3. SALMAN PATWEGAR
    Salman Patwegar Win User
    100% disk usage

    The most common cause of 100% disk usage appears to be Superfetch and Prefetch, but there are also other causes. You can try disabling both these features and see if it helps.

    This article provides steps to disable prefecth and superfetch:

    -
    How to Fix 100% Disk Usage Error in Windows 10
     
    Salman Patwegar, May 16, 2018
    #3
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How To Identify Cause of 100% Disk Usage?

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