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What does the scheduled defragmentation really do on a SSD when DisableDeleteNotify is manually set to 1 on recent Windows versions like Win 10?

Assuming that the SSD is properly detected by defragment as an SSD it is supposed it will go ahead to trim the free space; however configuring this parameter DisableDeleteNotify to 1 is globally documented in internet as fully disabling trim in Windows system-wide.

A link to any related documentation of MS would help to clarify the response.

The (off topic) context on this question is this: disabling instant trim while postponing it to a weekly task, similar to Linux, allows margin to forensic recover deleted data and files from SSD as it was possible with the old HDDs (now you only get zeroes).

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  • Was there ever any hint from Microsoft that it is supposed it will go ahead to trim the free space?
    – Tom Yan
    Commented Jul 12, 2021 at 1:35
  • Yes, here it mentions that SSDs are trimmed on scheduled defrag: docs.microsoft.com/en-us/windows-server/administration/…
    – JCM
    Commented Jul 12, 2021 at 5:30
  • It's not officially documented to be fully disabling trim in Windows: docs.microsoft.com/en-us/windows-server/administration/… Neither does its name hint so. Rather it pretty much implied that (only) notification (i.e. unmap/trim) upon (file) deletion will be disabled. Seems equivalent enough to the nodiscard mount option (which does not "block" FITRIM ioctl completely) in Linux to me.
    – Tom Yan
    Commented Jul 12, 2021 at 5:47
  • I agree with your guess, however notice later down in your link it refers literally to the system-wide trimming: “To query the system to see if TRIM is enabled or not:” - and thus I wrote this question.
    – JCM
    Commented Jul 12, 2021 at 6:14
  • I'll say it's just a lazy way to put it. Wouldn't be surprised in the Microsoft universe. Either way, the best way to find the answer is to experiment yourself (with a "RZAT" drive and those little programs on github or so). I didn't read carefully enough to see if you can actually do something like fstrim though (i.e. without all the schedule crap).
    – Tom Yan
    Commented Jul 12, 2021 at 6:29

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Please do not clean up the debris on the SSD, because that will reduce the lifespan of your SSD. To optimize the performance of SSD, please refer to other methods.

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