{
  "slug": "scsi-logical-unit",
  "term": "SCSI logical unit (LU)",
  "aliases": [
    "Logical unit (SCSI)",
    "SCSI LU"
  ],
  "definition": "A SCSI logical unit is an I/O-command execution entity addressed within a SCSI target.",
  "note": "Entity and address: The logical unit performs commands; its logical unit number (LUN) supplies the address. Confusing these two hides the distinction between the device function and how it is selected. [snia-lu] [snia-lun]\n\nScope: A target can serve multiple logical units. A logical unit need not correspond one-to-one with a physical drive. [rfc7143]",
  "status": "shipping",
  "advantages": [],
  "limitations": [],
  "supersedes": [],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "updated": "2026-10-20",
  "related": [
    "scsi",
    "logical-unit-number",
    "initiator-target",
    "command-descriptor-block"
  ],
  "citations": [
    {
      "id": "snia-lu",
      "title": "SNIA dictionary: logical unit",
      "url": "https://www.snia.org/education/online-dictionary/term/logical-unit",
      "accessed": "2026-10-20"
    },
    {
      "id": "snia-lun",
      "title": "SNIA dictionary: logical unit number",
      "url": "https://www.snia.org/education/online-dictionary/term/logical-unit-number",
      "accessed": "2026-10-20"
    },
    {
      "id": "rfc7143",
      "title": "RFC 7143 section 4.1: SCSI concepts",
      "url": "https://www.rfc-editor.org/rfc/rfc7143.html#section-4.1",
      "accessed": "2026-10-20"
    }
  ],
  "provenance": [
    "This entry describes SCSI addressing and command execution, not the separately defined NAND logical unit."
  ]
}