Windows 10 2004 optimization/defrag bug

Anonymous
2020-05-29T10:31:40+00:00

Hi all

I've just completed the Windows 10 2004 upgrade and I have noticed 2 issues.

  1. When I manually trim my SSD in the drive defrag/optimize tool in windows and I reboot it says 'never optimized' when i go back. I heard this was a bug in insider preview which they obviously didn't fix. 
  2. I happened to have the defrag/optimize tool open at the same time as Control Panel\All Control Panel Items\Security and Maintenance, I initiated a manual maintenance and I caught windows defragging my SSD and then it trimmed it straight afterwards. If i click the optimize button in defrag/optimize tool it only trims it and not defrag.

This seem to only happen when Control Panel\All Control Panel Items\Security and Maintenance initiates its automatic maintenance or if I select start maintenance.

This is concerning as it should never attempt to defrag an SSD.

My laptop is only a few months old and came with a PCIe SSD and Windows 10 1909 so there is no compatibility or lack of trim support issues obviously.

I have disabled scheduled weekly optimizations in the defrag/optimize tool which prevents it from attempting to defrag when the control penal maintenance attempts its maintenance when the computer is idle.

I want to let everyone know that this is happening so others are aware. My other computers that have the latest update are also doing it.

Windows for home | Windows 10 | Install and upgrade

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  1. Anonymous
    2020-08-02T13:58:51+00:00

    at this point, i dont think microsoft will fix it anymore...

    you are wrong. Microsoft has fixed the Defrag Bug in Windows 10 Build 19551. The next update feature will be code name manganese.

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  2. Anonymous
    2020-08-02T13:31:33+00:00

    Of course they will fix it, it's a serious flaw, which could potentially seriously shorten the life of SSDs in systems where people aren't aware of it!

    IIRC the story was that it was actually fixed in an earlier build, but then regressed for some reason, so they have done the work on it.

    Why they haven't just rolled the fix out again in an update is a mystery, maybe there was another issue with it.

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  3. Anonymous
    2020-08-02T12:37:40+00:00

    at this point, i dont think microsoft will fix it anymore...

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  4. Anonymous
    2020-08-02T11:31:40+00:00

    No sign of any fix in the next update, at least not in the preview.

    https://support.microsoft.com/en-gb/help/4568831/windows-10-update-kb4568831

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  5. Anonymous
    2020-08-02T09:32:56+00:00

    You're wrong. Windows performs defragmentation once every 30 days if volume snapshots are enabled[1]. This is where the fault is because with the default schedule this process is done every 7 days. As a workaround, you can either change the schedule to monthly or turn off completely System Restore, which should theoretically make SSD defragmentation unnecessary.

    1. https://www.hanselman.com/blog/TheRealAndCompleteStoryDoesWindowsDefragmentYourSSD.aspx

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