[kwlug-disc] Samsung EVO disappointment

[William Park]

Even with  Samsung 850 EVO and kernel 5.13.4, I see
     [    0.732455] ata1.00: disabling queued TRIM support

Looking at kernel config, I don't see anything obvious.  So, I don't 
know where that's coming from.
--William

On 8/1/21 8:50 PM, Paul Nijjar via kwlug-disc wrote:
> Earlier this year I decided to finally enter the 21st century and get
> an SSD for my netbook. I am paranoid about my data and so opted to
> spend more money than strictly necessary for reliability, and decided
> upon a Samsung 870 EVO. My impression at the time is that the Samsung
> drives had good performance and excellent reliability.
>
> Thanks to an overheating mishap I had to swap my SSD into another
> netbook, and I got hit by this bug:
>
> https://bugzilla.kernel.org/show_bug.cgi?id=201693
>
> It appears that modern Samsung SSD drives (the 860 and later for
> certain) don't play well with SATA controllers. In particular they
> have problems with the NCQ Trim command. Furthermore, on AMD SATA
> controllers they don't work well with NCQ commands at all, to the
> point where the only reliable fix is to disable NCQ for these drives
> in /etc/default/grub .
>
> What a disappointment. I spent extra money in the hopes I would get a
> more reliable product, and it appears those hopes were incorrect. To
> be fair, I have not measured the performance degradation and I do not
> know whether it will matter much for my use case, but I am still
> disappointed. I continue to hope that my data will stay safe, however.
>
> - Paul
>