Home Assistant exposes its host disk’s estimated lifetime used as a sensor, allowing an automation to warn about wear and a graph to show its progress. The figure was already visible in system health; the new diagnostic sensor starts disabled.
The estimate is available for eMMC storage and NVMe drives that report their percentage used. Zero represents a new disk and one hundred means the estimated lifetime has been used; eMMC values advance in ten-percentage-point steps. Unsupported disks report an unknown value. MB901 also makes a first contribution to Home Assistant’s website with the accompanying guide.