[kwlug-disc] SSD life

[Ron Singh]

The NVMe units sure sport better TBW specs compared to these older SATA
2.5" that's for sure. It's likely the older SATA ones were being quoted
with very conservative numbers though compared to today's "let's one-up the
competition" by ever-inflated TBW ratings, likely using looser data to
statistically drive up the published TBW numbers.
Samsung has been good with their datasheets showing specs on these older
units, for my 850 EVO, see --
https://download.semiconductor.samsung.com/resources/data-sheet/Samsung_SSD_850_EVO_Data_Sheet_Rev_3_1.pdf

Pretty comprehensive details there.

*Ron S.*


On Tue, Jun 23, 2026 at 10:38 AM Khalid Baheyeldin <kb at 2bits.com> wrote:

> Ron,
>
> If you are backing it regularly, then keep it going. As you say, it is
> only a few hours
> of restore on a new device if it finally dies.
>
> In my case ...
> I have not seen SATA SSDs (that I own) having an Endurance TDW
> specification,
> and don't report one in smartctl. Maybe because they are really old?
>
> The M.2 NVMe SSDs do have them, and most have a TDW of 600TB for the 1TB.
> That is for the consumer versions, not the enterprise ones.
>
> If I search for "X specs" (replace X by the model number), then usually
> you can get the TDW.
> For example, a Samsung PM9E1
> <https://semiconductor.samsung.com/ssd/pc-ssd/>, says 600TDW for the 1TB
> version.
> I managed to buy a used one for $120 (after being scammed by someone else).
> And it had only 1.69TB written, so plenty of life left.
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