nvme-placement-identifier · limited · also FDP placement identifier, PID (FDP)

NVMe placement identifier

An FDP value combining a reclaim group identifier with a namespace-scoped placement handle that maps to a reclaim unit handle.

Related Observatory article: NVMe placement identifier on hesela.com

The placement identifier supplements the logical block address; it does not replace it or directly name a NAND page. [1] Namespace mappings mean that a placement handle number must not be assumed equal to the controller's RUH identifier. [2] Use reported status descriptors rather than assuming every namespace exposes the same identifiers. [3]

Relations

related

nvme-fdp, nvme-reclaim-unit, nvme-reclaim-unit-handle, namespace-nvme

Limitations

• Available identifiers and mappings are configuration-dependent, not universal constants. [2, 3]

Citations

1. NVM Express Base Specification 2.1 (5 August 2024), sections 1.5.73-74 and 1.5.82-84: FDP terminology. (accessed 2026-10-12)
2. NVM Express NVM Command Set Specification 1.1 (5 August 2024), section 3.2.1.1 Figure 20 and section 4.1.6 Figure 125. (accessed 2026-10-12)
3. xNVMe v0.7.5 tutorial: Flexible Data Placement, log pages and feature controls. (accessed 2026-10-12)

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