PSA: Streaming n-grams from an SSD causes real wear via read disturbance and reclaim
Chromix_ · reddit · 2026-10-24
A detailed Reddit PSA explains that streaming n-gram tables from an SSD (common in local LLM inference) causes real wear: read disturbance shifts neighboring TLC/QLC cell voltages — a tested word line hit the ECC limit of adjacent cells after 54K reads — and the controller's read reclaim relocates pages, turning reads into writes. Balanced read patterns last far longer (518K reads) but eventually trigger relocations too. The author suggests checking SMART "data units written" counters while streaming to quantify whether the effect is banana- or flight-level radiation.
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