Windows 8 and 8.1 Forums


Does Windows 8.1 Automatic Maintenance activate TRIM?

  1. #1

    Does Windows 8.1 Automatic Maintenance activate TRIM?


    I need to know this, as I hear Defragmentation can damage an SSD if it is performed on it. Now we know Windows 8 and Windows 8.1 possess the Automatic Maintenance routine, where it starts to run some maintenance tasks when the computer is idle (apparently after 4 minutes of not detecting user activity with the keyboard or mouse and usually only once per hour).

    Now my current computer runs a HDD, and it does the regular Defrag every week or so when it can try and do so.

    However... SSDs can't be defragged, they have their own mechanism. TRIM.

    My planned computer build involves an SSD used as a OS Drive which also holds the browser and Anti-Virus Software Suite (which is going to be Kaspersky. Cause its decent and better than Norton). And also a HDD for storage of photos, videos, games, documents, etc.

    So it has one thing that needs TRIM and can't be defragmented and one thing that can't use TRIM and needs defragmentation.

    Does Windows 8.1's Automatic Maintenance differenciate between the two and just run TRIM on the SSD and Defrag on the HDD without performing the wrong thing on the other?

      My System SpecsSystem Spec

  2. #2


    Begen
    Posts : 26
    Windows 8.1 Pro
      My System SpecsSystem Spec

  3. #3


    If you installed windows on SSD anew and AHCI was turned on, on its controller, there should be no problem. You can check if trim is enabled by doing this in Command prompt:
    DisableDeleteNotify = 0 : TRIM is already enabled and working in Windows
    DisableDeleteNotify = 1 : TRIM is not enabled
    If necessary you can enable it:
    To enable SSD TRIM support in Windows
    fsutil behavior set DisableDeleteNotify 0

    You can check if trim is enabled for SSD in disk defragment settings and force it if necessary.
    Note that Trim only activates SSD's own deleted sectors cleanup and what may be thought of as defragmenting, it's all in it's firmware.
      My System SpecsSystem Spec

  4. #4


    Quote Originally Posted by CountMike View Post
    If you installed windows on SSD anew and AHCI was turned on, on its controller, there should be no problem. You can check if trim is enabled by doing this in Command prompt:
    DisableDeleteNotify = 0 : TRIM is already enabled and working in Windows
    DisableDeleteNotify = 1 : TRIM is not enabled
    If necessary you can enable it:
    To enable SSD TRIM support in Windows
    fsutil behavior set DisableDeleteNotify 0

    You can check if trim is enabled for SSD in disk defragment settings and force it if necessary.
    Note that Trim only activates SSD's own deleted sectors cleanup and what may be thought of as defragmenting, it's all in it's firmware.
    I get that, but what I meant was...

    Does the Automatic Maintenance only do TRIM for SSDs and only do Defragment on HDDs and not fire off Defragmentation on an SSD when it should really only be using TRIM on it? Or did Microsoft account for the fact people would be using SSD Boot Drives in combination with HDDs.

    ...Unless I'm fretting too much over an explictly clear answer and you pretty much said 'yeah microsoft did account for different drive types for automatic maintinenance' judging by your 'there should be no problem' comment. I'm just trying to handle all contingancies for when I pull the trigger and buy all the parts.
      My System SpecsSystem Spec

  5. #5


    Yes, it does exactly as it's set in disk defragment section, no more and no less.
      My System SpecsSystem Spec

  6. #6


    Quote Originally Posted by CountMike View Post
    Yes, it does exactly as it's set in disk defragment section, no more and no less.
    Oh good.
    Now I don't have to worry about my SSD being defragmented and not TRIM'd by Automatic Maintenance
      My System SpecsSystem Spec

Does Windows 8.1 Automatic Maintenance activate TRIM?
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