{
  "slug": "scsi-block-commands",
  "term": "SCSI Block Commands",
  "aliases": [
    "SBC"
  ],
  "definition": "SCSI Block Commands specifies device-type commands for block-oriented direct-access devices, including magnetic disks and solid-state devices.",
  "note": "SBC addresses the block-device command model, not the physical interconnect. It is distinct from SSC for sequential-access devices and SMC for medium changers. [t10-families]\n\nThe presence of a command in a standards family is not evidence that a particular device implements it. Match the device type, relevant command-standard revision and actual capabilities; neither a SCSI label nor a connector name is enough. [spc4-scope]",
  "citations": [
    {
      "id": "t10-families",
      "title": "T10 working drafts: SAM, SPC and device-type command families; descriptive index, not normative text",
      "url": "https://www.t10.org/drafts.htm",
      "accessed": "2026-11-10"
    },
    {
      "id": "spc4-scope",
      "title": "INCITS 513-2015 (R2020), SPC-4 public preview: introduction p. xli and clause 1 p. 1",
      "url": "https://webstore.ansi.org/preview-pages/INCITS/preview_INCITS%2B513-2015%2B(R2020).pdf",
      "accessed": "2026-11-10"
    },
    {
      "id": "hesela-scsi",
      "title": "Hesela: SCSI command, logical-unit and transport boundaries",
      "url": "https://hesela.com/tech/scsi/",
      "accessed": "2026-11-10"
    }
  ],
  "status": "unknown",
  "advantages": [],
  "limitations": [],
  "related": [
    "scsi",
    "t10-scsi",
    "scsi-architecture-model",
    "scsi-primary-commands"
  ],
  "supersedes": [],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "updated": "2026-11-10",
  "provenance": [
    "Foundational standards-family definition; public descriptive sources and the SPC-4 preview reviewed, not full restricted standards or device conformance."
  ]
}