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SSD Wear Leveling Count

I have access to a few non enterprise SSDs running in PCs. The systems are running Linux with different workloads. Most of the SSDs are reporting smart values from the disks, e.g. Wear Leveling Count (WLC) and LBAs written. Taking these two values, it is possible to extrapolate the SSD endurance. The assumption here is, that a wear level count of 100 announces the official end of the SSD life (estimated EOL).

SSD vendor Model Capacity SSD number Gigabytes written WLC Estimated EOL
Samsung 840 EVO(msata) 120GB 5 148 1% 15TB
Samsung 840 EVO(msata) 120GB 5 295 2% 15TB
Samsung 840 EVO(msata) 120GB 5 440 3% 15TB
Samsung 840 EVO 250GB 3 281 1% 28TB
Samsung 840 EVO 250GB 3 589 2% 29TB
Samsung 840 EVO 250GB 3 786 3% 26TB
Samsung 840 EVO 250GB 3 1071 4% 27TB
Samsung 840 EVO 500GB 4 567 1% 57TB
Samsung 840 EVO 500GB 4 1149 2% 56TB
Samsung 840 EVO 500GB 4 1714 3% 57TB
Samsung 840 EVO 500GB 4 2175 4% 54TB
Samsung 840 EVO 500GB 4 2732 5% 55TB
Samsung 840 500GB 1 716 2% 35TB
Samsung 840 500GB 1 1075 3% 36TB
Samsung 840 500GB 1 1417 4% 35TB
Samsung 840 500GB 2 416 1% 42TB
Samsung 840 500GB 2 857 2% 43TB
Samsung 840 500GB 2 1290 3% 43TB

The Samsung 840 EVO models have a higher endurance than the non EVO 840 models. The 500 GB Model could reach 56TBytes written. The smaller EVO model with 250GB capacity could reach 28 TBytes written.

Updated: 06/01/2016 — 22:27
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