{
  "slug": "cmr",
  "term": "Conventional magnetic recording (CMR)",
  "aliases": [
    "non-shingled PMR"
  ],
  "definition": "Perpendicular magnetic recording with non-overlapping tracks so any sector can be rewritten in place.",
  "note": "Often used informally for non-SMR HDDs on PMR media.",
  "status": "shipping",
  "advantages": [
    {
      "text": "Random rewrite without track-band garbage collection typical of SMR.",
      "citationIds": [
        "c1"
      ]
    }
  ],
  "limitations": [],
  "related": [
    "pmr",
    "smr",
    "hdd",
    "nearline-hdd"
  ],
  "supersedes": [
    "longitudinal-recording"
  ],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "citations": [
    {
      "id": "c1",
      "title": "Shingled magnetic recording",
      "url": "https://en.wikipedia.org/wiki/Shingled_magnetic_recording",
      "accessed": "2026-03-26"
    },
    {
      "id": "n2",
      "title": "Seagate — CMR and SMR hard drive list",
      "url": "https://www.seagate.com/products/cmr-smr-list/",
      "accessed": "2026-10-07"
    },
    {
      "id": "n3",
      "title": "Zoned Storage — SMR introduction (CMR vs overlapping tracks)",
      "url": "https://zonedstorage.io/docs/introduction/smr",
      "accessed": "2026-10-07"
    }
  ]
}