{
  "slug": "nvme-non-operational-power-state",
  "term": "NVMe non-operational power state",
  "aliases": [
    "NVMe non-operational state",
    "NVMe idle power state"
  ],
  "definition": "An NVMe non-operational power state suspends I/O command processing until the controller returns to an operational state.",
  "note": "Controller state: Admin-command and property activity can remain possible. An incoming I/O command restores the most recent operational state even with APST disabled. This is not a powered-off device. [base20e]\n\nLatency fields: ENLAT and EXLAT report maximum entry and exit latencies in microseconds. Zero means not reported, not zero delay. Relative read/write latency fields are ranks, not microsecond durations. These descriptors do not measure application response time. [psd]\n\nPower removal: PCI D3cold removes the main supply; returning from it involves power-on reset behavior. That device-level event is distinct from an NVMe idle-state transition. [pci]",
  "status": "shipping",
  "advantages": [],
  "limitations": [],
  "related": [
    "nvme-autonomous-power-state-transition",
    "host-controlled-thermal-management"
  ],
  "supersedes": [],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "citations": [
    {
      "id": "base20e",
      "title": "NVM Express Base Specification 2.0e: sections 5.27.1.9 and 8.15, Figure 281",
      "url": "https://nvmexpress.org/wp-content/uploads/NVM-Express-Base-Specification-2.0e-2024.07.29-Ratified.pdf",
      "accessed": "2026-10-21"
    },
    {
      "id": "psd",
      "title": "libnvme v1.15: nvme_id_psd power-state descriptors",
      "url": "https://github.com/linux-nvme/libnvme/blob/v1.15/doc/man/nvme_id_psd.2",
      "accessed": "2026-10-21"
    },
    {
      "id": "pci",
      "title": "Linux kernel documentation: PCI power-management states",
      "url": "https://docs.kernel.org/power/pci.html",
      "accessed": "2026-10-21"
    }
  ],
  "provenance": [
    "NVMe semantics use Base 2.0e and libnvme v1.15 field documentation; no physical-device wake latency was measured."
  ],
  "updated": "2026-10-21"
}