{
  "slug": "scsi-information-field",
  "term": "SCSI Information field",
  "aliases": [
    "SCSI sense Information",
    "Information sense data descriptor"
  ],
  "definition": "The SCSI Information field carries a command- or device-specific value whose interpretation depends on the sense-data format and the reported command.",
  "note": "Fixed-format sense carries four Information bytes; descriptor-format sense uses eight in the type-00h descriptor. This is distinct from the type-01h Command-specific Information descriptor. The cited Rev. M reference requires VALID=1 when the type-00h descriptor is returned. [seagate-information]\n\nLinux v6.12 checks fixed-format VALID before extracting a big-endian 32-bit value and extracts a big-endian 64-bit value from the Information descriptor. Its helper returns availability separately from the numeric output. A false return leaves the output argument unchanged, so discard it unless the return is true; the helper does not by itself establish command meaning or fully validate an arbitrary captured descriptor. [linux-information]\n\nPreserve received length, validity and command context. Missing or truncated information is not LBA zero; a valid zero remains a possible value. An address interpretation requires the relevant command contract, not merely a decoded number. [hesela-information]",
  "status": "shipping",
  "advantages": [],
  "limitations": [
    "An Information value alone neither diagnoses a physical fault nor proves a complete list of affected blocks."
  ],
  "related": [
    "scsi-sense-key",
    "scsi-deferred-error",
    "scsi-check-condition",
    "logical-block-address",
    "scsi-compare-and-write"
  ],
  "supersedes": [],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "updated": "2026-11-08",
  "citations": [
    {
      "id": "seagate-information",
      "title": "Seagate SCSI Commands Reference Rev. M (June 2022), sections 2.4.1.1.2-3 and 2.4.1.2",
      "url": "https://www.seagate.com/files/staticfiles/support/docs/manual/Interface%20manuals/100293068m.pdf#page=49",
      "accessed": "2026-11-08"
    },
    {
      "id": "linux-information",
      "title": "Linux v6.12: scsi_get_sense_info_fld at pinned commit adc218676eef",
      "url": "https://github.com/torvalds/linux/blob/adc218676eef25575469234709c2d87185ca223a/drivers/scsi/scsi_error.c#L2393",
      "accessed": "2026-11-08"
    },
    {
      "id": "hesela-information",
      "title": "Hesela: a decoded Information value is not automatically a failing LBA",
      "url": "https://hesela.com/analyses/scsi-sense-kernel-log-signatures/#sense-information",
      "accessed": "2026-11-08"
    }
  ]
}