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  • Win10 Task Manager showing disk 100% busy

    Home Forums AskWoody support Windows Windows 10 Questions: Win10 Win10 Task Manager showing disk 100% busy

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      • #2305549
        AskWoody Plus

        My first post here; sorry if in wrong place. Also, if this has been asked and answered in the past, I did not find anything in doing a search; I apologize in advance.

        My Win10 system shows that I have my system disk (C:), a normal hdd, 100% busy with average response times often over 1,000 to 5,000 ms, according to Task Manager->Performance tab. Resource Monitor shows that PID 4, the OS, has lots (~25) of files open, like various log files from the names, and busily writing and reading. No other foreground processes open. I stopped several of the services like the background file indexing, but no help. I found some articles on-line that referred to disks using “MSI” mode and how to disable that in the registry. That helped a little. Oh, this is a 6 core Intel i7-8700 CPU that is less than 20% utilized during the high disk utilization. Also, I have 64Gb of RAM that is often less than 10Gb used since the system is virtually non-usable when the response times are so bad. Because of the high memory, I am not using a pagefile at this point. Resource Monitor shows ~70,000 B/sec being read and written by PID 4 (“System” process) often. What is keeping the disk so busy? Again, it makes what should be a powerful system slow as cold molasses. Where else can I look or do? Thank you.

      • #2305566
        AskWoody Plus

        A check disk can show you if there are any physical problems with your hard drive. Usually, a high disk usage indicates that there is an application or logical issue driving the disk usage, but it is worth your time to rule out any physical damage. Run check disk and note its results.

      • #2305612
        Paul T
        AskWoody MVP

        Try Sysinternals Process Monitor.
        Fire it up when your machine is peaking and then turn off the capture (3rd icon on the toolbar).
        Tools > File Summary

        You will get a list of active files in order of use.

        cheers, Paul

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