{
  "slug": "sas-wide-port",
  "term": "SAS wide port",
  "aliases": [
    "wide SAS port"
  ],
  "definition": "A SAS port containing more than one PHY, allowing separate connections across the port's links.",
  "note": "Port membership depends on matching local and attached SAS addresses, not merely on sharing a connector. One connection uses one pathway even when the port has multiple PHYs. [sas-manual]\n\nA four-PHY connector can serve one wide port or separate narrower ports. A dual-port drive instead exposes two ports, which may each be narrow. [ports] Redundant paths additionally depend on the intervening controllers, expanders and cabling. [architecture]",
  "related": [
    "sas",
    "sas-phy",
    "sas-expander",
    "dual-port",
    "multipath-io"
  ],
  "citations": [
    {
      "id": "sas-manual",
      "title": "Seagate SAS Interface Manual, Rev. C (2009), sections 2.1.2, 2.1.4 and 5.11.1-2",
      "url": "https://www.seagate.com/staticfiles/support/disc/manuals/Interface%20manuals/100293071c.pdf",
      "accessed": "2026-10-17"
    },
    {
      "id": "ports",
      "title": "Oracle HBA guide: SAS phys, ports, addresses and connectors (2010), appendix G",
      "url": "https://docs.oracle.com/cd/E19269-01/820-1847-20/appendixg.html",
      "accessed": "2026-10-17"
    },
    {
      "id": "architecture",
      "title": "IBM Power6 documentation: SAS architecture",
      "url": "https://www.ibm.com/docs/en/power6?topic=overview-sas-architecture",
      "accessed": "2026-10-17"
    }
  ],
  "provenance": [
    "The connection model is cited to Seagate Rev. C (2009); no current generation's maximum port width or measured throughput is asserted."
  ],
  "status": "shipping",
  "advantages": [],
  "limitations": [],
  "supersedes": [],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "updated": "2026-10-17"
}