{
  "slug": "parity-pollution",
  "term": "Parity pollution",
  "aliases": [],
  "definition": "Parity pollution is propagation of incorrect data into redundancy information through parity calculations.",
  "note": "The FAST 2008 model demonstrates why maintenance reads need suitable validation before their data influences reconstruction or parity updates; it does not show that all scrubbing is harmful.",
  "related": [
    "lost-write",
    "misdirected-write",
    "data-scrubbing",
    "raid-5"
  ],
  "citations": [
    {
      "id": "parity",
      "title": "Krioukov et al. Parity Lost and Parity Regained. FAST 2008, sections 3-4.",
      "url": "https://www.usenix.org/legacy/event/fast08/tech/full_papers/krioukov/krioukov_html/index.html",
      "accessed": "2026-10-11"
    },
    {
      "id": "hesela-integrity",
      "title": "Hesela: checksum, identity and freshness boundaries with executable synthetic examples",
      "url": "https://hesela.com/analyses/checksums-identity-and-lost-writes/",
      "accessed": "2026-10-11"
    }
  ],
  "status": "unknown",
  "advantages": [],
  "limitations": [],
  "supersedes": [],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "updated": "2026-10-11"
}