{
  "slug": "sas",
  "term": "Serial Attached SCSI (SAS)",
  "aliases": [
    "SAS"
  ],
  "definition": "An enterprise storage interface that extends SCSI semantics over a serial point-to-point or expander topology.",
  "note": "Serial Attached SCSI is a point-to-point serial interconnect and protocol family that carries SCSI command sets for enterprise disks and SSDs. Hosts and expanders form SAS domains; dual-port drives support multipath high availability. Link rates have scaled through generations commonly marketed as 3, 6, and 12 Gbit/s (and faster in later specs). Nearline HDD fleets and many enterprise SSDs still use SAS for dual-port and expander topologies that SATA does not match. SCSI zoning for host-managed SMR uses ZBC on SAS paths. SAS is about domain topology and SCSI semantics—not a recording technology.",
  "status": "shipping",
  "advantages": [],
  "limitations": [],
  "related": [
    "scsi",
    "hdd",
    "nearline-hdd",
    "enterprise-ssd"
  ],
  "supersedes": [
    "scsi"
  ],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "citations": [
    {
      "id": "c1",
      "title": "Serial Attached SCSI",
      "url": "https://en.wikipedia.org/wiki/Serial_Attached_SCSI",
      "accessed": "2026-03-26"
    },
    {
      "id": "n2",
      "title": "SCSI Trade Association — Serial Attached SCSI overview",
      "url": "https://www.scsi.org/sas/",
      "accessed": "2026-10-07"
    },
    {
      "id": "n3",
      "title": "Zoned Storage — SMR / ZBC on SCSI (SAS path)",
      "url": "https://zonedstorage.io/docs/introduction/smr",
      "accessed": "2026-10-07"
    }
  ]
}