{
  "slug": "count-key-data",
  "term": "CKD DASD",
  "aliases": [],
  "definition": "Count-key-data block layout used on classic mainframe disks unlike fixed SCSI sectors.",
  "note": "",
  "status": "limited",
  "advantages": [],
  "limitations": [],
  "related": [
    "mainframe-dasd"
  ],
  "supersedes": [],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "citations": [
    {
      "id": "c1",
      "title": "CKD DASD",
      "url": "https://en.wikipedia.org/wiki/Count_key_data",
      "accessed": "2026-03-26"
    }
  ]
}