{
  "slug": "nvme-percentage-used",
  "term": "NVMe Percentage Used",
  "aliases": [
    "Percentage Used",
    "PUSED",
    "percent_used"
  ],
  "definition": "NVMe Percentage Used is a vendor-specific estimate of the percentage of NVM endurance consumed by actual use.",
  "note": "At 100, the estimated endurance has been consumed, but failure is not implied. Values may exceed 100; values above 254 are encoded as 255. The controller updates the estimate once per power-on hour outside sleep. This entry describes byte 5 of SMART / Health Information log 02h, not similarly named fields with a different scope. [nvme-base-2-3-smart]",
  "status": "shipping",
  "advantages": [],
  "limitations": [
    {
      "text": "This manufacturer-dependent estimate is neither a failure probability nor a direct measure of remaining calendar life; comparisons across devices require knowledge of the estimation method.",
      "citationIds": [
        "libnvme-smart-log",
        "nvme-base-2-3-smart"
      ]
    }
  ],
  "related": [
    "nvme-smart-log",
    "nvme-available-spare",
    "nvme-data-units-written"
  ],
  "supersedes": [],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "citations": [
    {
      "id": "libnvme-smart-log",
      "title": "libnvme: struct nvme_smart_log, percent_used member",
      "url": "https://github.com/linux-nvme/libnvme/blob/master/src/nvme/types.h",
      "accessed": "2026-10-14"
    },
    {
      "id": "nvme-base-2-3-smart",
      "title": "NVM Express Base Specification 2.3, section 5.2.12.1.3, Figure 210, p. 215: Percentage Used",
      "url": "https://nvmexpress.org/wp-content/uploads/NVM-Express-Base-Specification-Revision-2.3-2025.08.01-Ratified.pdf",
      "accessed": "2026-10-14"
    }
  ],
  "updated": "2026-10-14"
}