{
  "slug": "distributed-spare",
  "term": "Distributed spare",
  "aliases": [
    "distributed hot spare"
  ],
  "definition": "A distributed spare is replacement capacity spread across multiple devices rather than reserved on a single dedicated spare device.",
  "note": "It permits reconstruction writes to use multiple destinations; placement constraints and reserved capacity still apply.",
  "related": [
    "parity-declustering",
    "raid",
    "hot-spare",
    "raid-rebuild"
  ],
  "citations": [
    {
      "id": "openzfs",
      "title": "OpenZFS: dRAID how-to, Introduction and Rebuilding to a Distributed Spare (living documentation, functionality introduced in 2.1.0).",
      "url": "https://openzfs.github.io/openzfs-docs/Basic%20Concepts/Pool%20Structure/dRAID%20Howto.html",
      "accessed": "2026-10-13"
    },
    {
      "id": "hesela-declustering",
      "title": "Parity declustering: less load per disk, not fewer reads",
      "url": "https://hesela.com/analyses/parity-declustering-rebuild-load/",
      "accessed": "2026-10-13"
    }
  ],
  "status": "shipping",
  "advantages": [],
  "limitations": [],
  "supersedes": [],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "updated": "2026-10-13"
}