I upgraded my old computer with a Samsung EVO 850. I did a clean Windows 10 installation.

Installed Samsung Magic and fixed all the AHCI settings. Now I have full 6Gb/s transfer speed.

However, my problem is Windows "Optimize Drives" tool wants to defrag my SSD like a hard drive. As far as I know, this is bad.

The rest of the OS works fine, and my 3rd party programs see that it's a SSD.

CPU: Intel Core i7 (4th gen)
Mobo: Asus P7P55DE_PRO

  • I had the exact same problem, just the other way around. – aman207 Jan 7 '16 at 3:15

Windows detects the type based on the benchmarks results. Run winsat formal from a cmd.exe, started as admin to bench the drive again.

Now Windows should detect the drive again as SSD and should only TRIM it and don't do a fully defrag.

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  • Ok, it now shows my "solid state" media but optimiation isn't available for some reaons. Thank you so much for the help btw. – Michael Bridges Dec 1 '15 at 3:19
  • maybe this means "no action" needed for the drive. Accept the answer to "close" the question. – magicandre1981 Dec 1 '15 at 5:03
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    What worked for me was to run winsat disk -drive X for each of the drives, as winsat diskformal only seems to do the first drive and I have multiple partitions on the first disk, so it was still detected as HDD. – Natan Mar 30 '18 at 10:57

Command winsat formal didn't work for me, I used winsat diskformal, like descripted here: https://shoprex.org/en/windows-change-hard-disk-drive-to-solid-state-drive-with-one-simple-command/

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