I updated the firmware of my Samsung 840 Pro to the newest version (DXM06B0Q). This SSD (along with many other Samsung SSDs) had a bug where it deletes arbitrary data if asynchronous TRIM is used. Can I now enable TRIM safely?

  • You could use synchronous TRIM (see the Arch Linux Wiki). Also, I have the 850 Evo with continuous TRIM enabled, and have had not issues. However, note that there are significant differences between the 840 and 850. – Caleb Reister Jan 5 '17 at 1:09

Yes. I concluded this for myself for reasons described in this answer.

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