Windows 8 and 8.1 Forums


SSD defrag issues in Windows 8.1 RTM

  1. #11


    I don't even have that System reserved partition, never had it on any system and don't miss it. In any case it is on SSD and is of no consequence.

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  2. #12


    Posts : 2,191
    Windows 8.1


    Quote Originally Posted by djsigma View Post
    Quote Originally Posted by my2cents View Post
    I would still be concerned about the C partition not optimizing properly and I (personally) would turn off the weekly schedule until a proper optimization solution is found. Could you provide a screenshot of Disk Management?
    The C partition is optimising fine. It's the System Reserved partition that isn't.

    Hmm... Your first post showed your defrag attempt of the C partition acting like a mechanical hard drive; in that, it was defragging and not optimizing. IMHO, that is not acceptable. So, did you fix that so it now optimizes properly? If not, that would be my main concern. And, as others have stated, forget the System Reserved.
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  3. #13


    Posts : 2,191
    Windows 8.1


    Here's what optimization looks like while running on an SSD:

    Click image for larger version

    I didn't see that in your first post. Again, I would turn off weekly scheduling until a solution is found.
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  4. #14


    Posts : 103
    Windows 8.1 Pro with Media Center (64 bit)


    That defrag issue is a bug in Windows 8 that has carried over to 8.1, as detailed here: -

    Why Windows 8 defragments your SSD and how you can avoid this |

    The fix for that is to exclude the SSD from the default scheduled maintenance and set up a new event in Task Scheduler that will just retrim the drive once per week.
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  5. #15


    Not even forcing the Trim changes anything, it is important to have it enabled but SSD is the one that requests it from OS and than does it's optimizing without use of the OS. Optimizing SSD is completely different from HDD,there is no fragmentation or changing physical place for files, it just unloads cells marked erased and spreads the load equally.
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  6. #16


    Posts : 2,191
    Windows 8.1


    Quote Originally Posted by djsigma View Post
    That defrag issue is a bug in Windows 8 that has carried over to 8.1, as detailed here: -

    Why Windows 8 defragments your SSD and how you can avoid this |

    The fix for that is to exclude the SSD from the default scheduled maintenance and set up a new event in Task Scheduler that will just retrim the drive once per week.
    Never heard of or encountered that bug in many Win 8 and 8.1 installs; however, if you feel confident that solution will work for you, then good luck.
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  7. #17


    Posts : 103
    Windows 8.1 Pro with Media Center (64 bit)


    Quote Originally Posted by my2cents View Post
    Never heard of or encountered that bug in many Win 8 and 8.1 installs; however, if you feel confident that solution will work for you, then good luck.
    That's because it's not something you would normally notice. If you launch Optimise Drives manually and select a partition on an SSD and hit "Optimise" the bug will not occur. It only occurs if your drive is over 10% fragmented and a scheduled maintenance run kicks in, in which case you wouldn't be looking at the Optimise Drives screen to see the defrag taking place and an SSD is silent so you hear no disc churning, or if you go into Action Center and start a maintenance run manually, which is not something that people tend to do.

    Try copying and pasting this into Windows Powershell: -

    Get-EventLog -LogName Application -Source "microsoft-windows-defrag" | sort timegenerated -desc | fl timegenerated, message
    Then look through the results to see if there's any mention of your SSD being defragmented, rather than retrimmed. The longer your system has been up and running, the more likely you are to hit the "over 10% fragmented" mark which would cause the bug to kick in and defrag the SSD, rather than just retrimming it.

    There's another thread on here where this was discussed and some users were unaware that their SSD was being defragmented until they ran the above command: -

    Defrag on SSD

    There's also a warning about this bug at the top of this guide: -

    Optimize Drives Schedule - Change in Windows 8
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  8. #18


    Posts : 2,191
    Windows 8.1


    Thank you for that detailed response and I am glad that you got your issue resolved; however, I cannot recreate your circumstances because of the way I maintain my PC for the following reasons:

    I keep a watchful eye on my Event Logs and clear them on a regular basis.
    I have scheduled defrag turned off and I only optimize on a manual basis as needed
    (see previous screenshot).
    I have never seen a warning about a percentile of defrag notice as you describe (eg 10%).
    I only see two notices and they are either OK or Needs Optimization.

    In any event, glad you are satisfied with your workaround and I hope it serves you well.
      My System SpecsSystem Spec

  9. #19


    Posts : 103
    Windows 8.1 Pro with Media Center (64 bit)


    Right, well if you manually optimise within Optimise Drives, then you will never encounter that bug, but with a stock install of Windows 8 or 8.1 where maintenance is scheduled, chances are that you would. Unfortunately, trying to get MS to take notice of this is not an easy task! lol.
      My System SpecsSystem Spec

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