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gates / gates (push) Successful in 9s
Part 4 was gated on a measurement. On demo-hp (Tier 0) the controller's real /disks fetch — fetchDisks, the same path the check uses, not the 60s card cache — costs min 0.805s / median 0.821s / max 0.841s over 10 calls, all HTTP 200, across 3 physical disk rows (2 distinct devices). Median is 6x under the 5s bar, so the <5s branch applies and the interval drops 6h -> 1h. Why it matters: the one real failing drive's benign excursion lasted about ONE HOUR and cleared completely. A 6-hourly sampler can land either side of an excursion like that, see nothing, and then catch the terminal run half a day late. The smartd history that produced the whole analysis sampled every 30 minutes and only just resolved the shape.