{
  "status": "shipping",
  "advantages": [
    {
      "text": "Tracks potentially unsynchronized regions so recovery can avoid scanning every region.",
      "citationIds": [
        "md"
      ]
    }
  ],
  "limitations": [
    {
      "text": "A bitmap is not a data journal or an independent copy of missing contents.",
      "citationIds": [
        "md",
        "journal"
      ]
    }
  ],
  "supersedes": [],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "slug": "write-intent-bitmap",
  "term": "Write-intent bitmap",
  "aliases": [
    "RAID bitmap"
  ],
  "definition": "A write-intent bitmap tracks regions of a redundant array that may need synchronization after interrupted writes.",
  "note": "A bit identifies a region, not the old or new user data needed to replay its update.",
  "related": [
    "raid-write-hole",
    "partial-parity-log",
    "raid-5",
    "mirroring"
  ],
  "citations": [
    {
      "id": "md",
      "title": "Linux v6.12: RAID arrays, dirty/degraded assembly and bitmap metadata",
      "url": "https://github.com/torvalds/linux/blob/v6.12/Documentation/admin-guide/md.rst",
      "accessed": "2026-10-11"
    },
    {
      "id": "journal",
      "title": "Linux v6.12: RAID 4/5/6 cache",
      "url": "https://github.com/torvalds/linux/blob/v6.12/Documentation/driver-api/md/raid5-cache.rst",
      "accessed": "2026-10-11"
    },
    {
      "id": "hesela-raid",
      "title": "Hesela: RAID write hole, bitmap and PPL",
      "url": "https://hesela.com/analyses/raid-write-hole-bitmap-ppl/",
      "accessed": "2026-10-11"
    }
  ]
}