{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-12T09:13:47Z",
    "providers": [
      "Codex"
    ],
    "breadth": "recalled by Codex without web access - no source was read",
    "missingProviders": [],
    "pass": 2,
    "cost": {
      "grok": {
        "seconds": 25.7,
        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a094e3-c89b-77e0-b16e-3ca88aced1e6\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: disk drive\nSense to describe: (none recorded)\nDomain code: PHY.OBJ\nAlso known as: (none)\n\n\nContext for this batch of 1001 things:\n# Batch 043: 1001 regi",
        "usd": 0.0,
        "recall": true
      },
      "codex": {
        "seconds": 76.9,
        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a094e3-c890-7781-9cec-5a0cc762cb81\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: disk drive\nRegistry id: vr.tr.disk-drive\nPlane / domain: PHY / PHY.OBJ\nRegistry definition: (none recorded)\nNames folded into this entry: (none)\n\n\nCo"
      }
    },
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-06T12:00:00Z",
      "ingestedAt": "2026-10-06T08:41:21+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "failure_modes_and_hazards",
        "owners",
        "standards_and_regulation",
        "visual_identification"
      ]
    },
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-08T19:09:52+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q25399170",
    "registryId": "vr.tr.disk-drive",
    "name": "disk drive",
    "version": "0.1.0-research.1",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.OBJ"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q25399170/",
  "model": {
    "registry_id": "vr.tr.disk-drive",
    "name": "disk drive",
    "purpose": "Enable an AI agent to recognise a disk drive, assess its media and operating condition, and determine which connection, reading, writing, maintenance or retirement actions are appropriate.",
    "definition": "A disk drive is a data-storage device that rotates a magnetic or optical disk and uses a head or optical pickup to read recorded data and, where supported, write data.",
    "scope_statement": "This model owns the physical device kind that reads or writes disk-shaped storage media, including magnetic and optical implementations, and the properties needed to assess particular units; whether the registry also intends to include solid-state drives remains unresolved.",
    "in_scope": [
      "Disk-based storage mechanism, including fixed or removable media and read-only or writable operation",
      "Drive interfaces, command capabilities, power requirements and physical installation constraints",
      "Media compatibility, addressable capacity and access performance",
      "Drive states, diagnostic evidence, failure symptoms and recovery constraints",
      "Read, write, eject, sanitisation and retirement actions with their prerequisites"
    ],
    "out_of_scope": [
      "Files, directories, partitions and filesystems as logical information structures",
      "Storage arrays, RAID policies and distributed storage services",
      "Removable disks as independently managed physical media, except their compatibility with the drive",
      "Host computers and operating systems beyond their connection to the drive",
      "Product catalogue records and individual asset histories as independently modelled records"
    ],
    "distinguishing_features": [
      "For the provisional physical-media scope, the device accesses recording surfaces on a rotating disk; a flash-only SSD lacks this mechanism even when called a disk by software.",
      "A drive contains the mechanism that accesses the medium; a loose optical disc or floppy disk is media rather than a drive.",
      "A USB enclosure or interface bridge alone is not a disk drive unless it includes the storage-access mechanism.",
      "A logical volume or disk image can expose disk-like addresses without being a physical drive.",
      "Compatibility depends on the recording technology and supported media formats, not merely the disk's shape or nominal diameter."
    ],
    "characteristics": [
      {
        "name": "Recording technology",
        "kind": "category",
        "unit_or_values": "Magnetic rigid disk; magnetic flexible disk; optical disk; other evidenced disk technology; unknown",
        "why_it_matters": "Determines the operating mechanism, compatible media and relevant failure evidence."
      },
      {
        "name": "Media arrangement",
        "kind": "category",
        "unit_or_values": "Fixed internal media; user-removable media; unknown",
        "why_it_matters": "Distinguishes replacing a whole drive from changing the medium and governs ejection actions."
      },
      {
        "name": "Supported media",
        "kind": "relation",
        "unit_or_values": "Links to supported media families, physical formats and recording variants",
        "why_it_matters": "Prevents treating physically insertable media as necessarily readable or writable."
      },
      {
        "name": "Host connection",
        "kind": "category",
        "unit_or_values": "Physical connector, transport, command protocol and any intervening bridge",
        "why_it_matters": "A matching connector alone does not establish electrical or command compatibility."
      },
      {
        "name": "Addressable capacity",
        "kind": "measurement",
        "unit_or_values": "Bytes, with reported block count and bytes per block where applicable",
        "why_it_matters": "Establishes available address space while distinguishing drive capability from the currently loaded medium."
      },
      {
        "name": "Physical envelope",
        "kind": "measurement",
        "unit_or_values": "Width, height and depth in mm; mounting pattern or documented form-factor designation",
        "why_it_matters": "Determines whether the drive fits and can be secured in the intended installation."
      },
      {
        "name": "Power requirements",
        "kind": "measurement",
        "unit_or_values": "Supply voltage in V and current in A or power in W, distinguishing startup and steady operation",
        "why_it_matters": "Allows assessment of power adequacy during spin-up and normal use."
      },
      {
        "name": "Access performance",
        "kind": "measurement",
        "unit_or_values": "Transfer rate in MB/s with byte convention stated; latency in ms; workload and media conditions recorded",
        "why_it_matters": "Supports useful comparison without confusing interface limits with achieved media performance."
      },
      {
        "name": "Operational state",
        "kind": "state",
        "unit_or_values": "Unpowered; initialising; ready; busy; standby; no media; fault; unknown, where applicable",
        "why_it_matters": "Determines whether access, power removal or media removal can proceed."
      },
      {
        "name": "Write capability and protection",
        "kind": "state",
        "unit_or_values": "Read-only capability; write-capable and enabled; write-protected; media-dependent; unknown",
        "why_it_matters": "Separates technical write capability from current protection and authorisation to modify data."
      },
      {
        "name": "Health evidence",
        "kind": "relation",
        "unit_or_values": "Timestamped diagnostic reports, read-error observations, self-test results and physical symptoms",
        "why_it_matters": "Supports condition assessment without treating a single status indicator as proof of reliability."
      }
    ],
    "affordances": [
      "Match a drive to a host, power supply and compatible medium using documented interface and media requirements.",
      "Identify the device and inspect available status information while recording whether the inspection changes device state.",
      "Read or image accessible media under an appropriate preservation and error-handling policy.",
      "Write, format or erase only when capability, media suitability and authority to alter the data are established.",
      "Mount, power down or eject media after checking outstanding operations and mechanism-specific prerequisites.",
      "Select continued use, limited diagnostic work, specialist recovery or retirement from observed condition and data importance."
    ],
    "agent_conduct": {
      "may": [
        "Read health and status data from a disk drive on a system it administers.",
        "Copy or back up data from a drive with the owner's authorization."
      ],
      "must_not": [
        "Read or copy data from a drive without the owner's authorization.",
        "Erase, reformat or repartition a drive without a verified backup and authorization.",
        "Dispose of a drive that holds personal data without secure sanitization.",
        "Open a sealed drive outside a clean environment."
      ],
      "requires_human": [
        "Sanitizing or destroying a drive that holds other people's data.",
        "Attempting recovery from a failing drive where data could be lost."
      ]
    },
    "ethics": {
      "considerations": [
        "Drives hold private and business data; disposal and access raise privacy risks.",
        "Electronic waste harms workers and the environment where it is processed."
      ],
      "affected_parties": [
        "Data owners",
        "People whose data is stored",
        "E-waste workers"
      ]
    },
    "owners": {
      "steward": "The owner of the device; the data controller answers for the data on it.",
      "master_systems": [
        "Asset registers of the organization that owns it"
      ]
    },
    "visual_identification": [
      "A sealed rectangular metal unit with a data and power connector, typically in 3.5-inch or 2.5-inch form.",
      "Optical drives have a tray or slot for discs.",
      "A label shows model, capacity and serial number."
    ],
    "failure_modes_and_hazards": [
      "Mechanical failure loses data without warning.",
      "Discarded drives leak data if not sanitized.",
      "Dropping a running hard drive can damage the platters."
    ],
    "standards_and_regulation": [
      "NIST SP 800-88 Guidelines for Media Sanitization, National Institute of Standards and Technology.",
      "ATA/ATAPI command set standards, INCITS Technical Committee T13."
    ],
    "what_it_is_for": [
      "Disk drives are used in computers, external storage equipment and media systems to retrieve data from rotating magnetic or optical disks.",
      "Writable combinations of drive and medium also support saving files, distributing data and maintaining backups.",
      "They are encountered in maintenance and archival work where media compatibility, interface type and mechanical condition affect access to stored information."
    ]
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q25399170: disk drive",
      "url": "https://www.wikidata.org/wiki/Q25399170",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-it",
      "title": "Wikipedia (it): Unità a disco",
      "url": "https://it.wikipedia.org/wiki/Unit%C3%A0_a_disco",
      "url_status": "live",
      "checked_by": "wikidata-api sitelink",
      "what_it_supports": "general description of the item"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "disk-mechanism-and-boundary",
        "name": "Disk mechanism and boundary",
        "description": "Establishes what mechanism makes the thing a disk drive and where the drive ends and its media begin.",
        "rationale": "Disk drive can refer to several physical technologies and is also used loosely for non-disk storage.",
        "layers": [
          {
            "id": "recording-mechanism",
            "name": "Recording mechanism",
            "description": "Identifies the recording surface and the means of accessing it.",
            "findings": [
              {
                "id": "disk-based-access",
                "name": "Disk-based access",
                "description": "Record evidence of rotating disk media and the magnetic, optical or other read/write mechanism without inferring it from a software device label.",
                "questions": [
                  {
                    "text": "What physical medium rotates, and what mechanism reads or writes its recording surface?",
                    "kind": "definition",
                    "id": "disk-based-access-q01"
                  },
                  {
                    "text": "Does the evidence identify a physical disk mechanism, an SSD, an enclosure or a logical disk abstraction?",
                    "kind": "boundary",
                    "id": "disk-based-access-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "drive-media-separation",
            "name": "Drive and media separation",
            "description": "Distinguishes fixed media from separately handled disks.",
            "findings": [
              {
                "id": "media-ownership-and-removal",
                "name": "Media ownership and removal",
                "description": "Record whether media are integral to the drive or removable in normal use, and attribute media-specific observations to the correct object.",
                "questions": [
                  {
                    "text": "Can the recording medium be exchanged through the intended user procedure?",
                    "kind": "definition",
                    "id": "media-ownership-and-removal-q01"
                  },
                  {
                    "text": "Which capacity, damage and data-retention observations concern the drive, and which concern the installed disk?",
                    "kind": "boundary",
                    "id": "media-ownership-and-removal-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "host-and-media-compatibility",
        "name": "Host and media compatibility",
        "description": "Determines whether the drive can be connected, powered and used with a particular disk.",
        "rationale": "Connector fit and disk fit do not by themselves establish usable compatibility.",
        "layers": [
          {
            "id": "host-attachment",
            "name": "Host attachment",
            "description": "Covers electrical, protocol and mounting requirements.",
            "findings": [
              {
                "id": "attachment-requirements",
                "name": "Attachment requirements",
                "description": "Record connector, transport, command protocol, supply requirements and physical mounting constraints, including limitations introduced by adapters.",
                "questions": [
                  {
                    "text": "Which manufacturer documentation establishes the connector, protocol, supply and mounting requirements?",
                    "kind": "provenance",
                    "id": "attachment-requirements-q01"
                  },
                  {
                    "text": "Can the proposed host and any bridge provide the required power and expose the commands needed for the intended operation?",
                    "kind": "action",
                    "id": "attachment-requirements-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "media-format-support",
            "name": "Media format support",
            "description": "Separates media acceptance, reading and writing capabilities.",
            "findings": [
              {
                "id": "supported-media-operations",
                "name": "Supported media operations",
                "description": "Record supported disk families and recording variants separately for reading, writing and rewriting.",
                "questions": [
                  {
                    "text": "Which disk sizes, recording formats and media variants are explicitly supported for each operation?",
                    "kind": "definition",
                    "id": "supported-media-operations-q01"
                  },
                  {
                    "text": "What documentation or observed identification result supports compatibility with the currently installed medium?",
                    "kind": "provenance",
                    "id": "supported-media-operations-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "capacity-and-data-access",
        "name": "Capacity and data access",
        "description": "Describes the addressable storage and the conditions under which data can be accessed.",
        "rationale": "Reported space and throughput depend on media, device presentation and workload rather than a single drive label.",
        "layers": [
          {
            "id": "address-space",
            "name": "Address space",
            "description": "Records device-visible capacity and addressing units.",
            "findings": [
              {
                "id": "reported-storage-extent",
                "name": "Reported storage extent",
                "description": "Capture capacity from an identified observation and distinguish addressable storage from filesystem free space.",
                "questions": [
                  {
                    "text": "What capacity and addressing units does the device report for the installed medium?",
                    "kind": "measurement",
                    "id": "reported-storage-extent-q01"
                  },
                  {
                    "text": "Does the value describe raw media, host-visible blocks, a partition or filesystem-available space?",
                    "kind": "boundary",
                    "id": "reported-storage-extent-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "access-behaviour",
            "name": "Access behaviour",
            "description": "Relates access speed and write completion to the operating conditions.",
            "findings": [
              {
                "id": "performance-and-write-completion",
                "name": "Performance and write completion",
                "description": "Record observed access performance with workload context and distinguish command completion from evidence that writes reached persistent media.",
                "questions": [
                  {
                    "text": "What transfer rate and latency were observed, with which medium, access pattern, request size and cache conditions?",
                    "kind": "measurement",
                    "id": "performance-and-write-completion-q01"
                  },
                  {
                    "text": "What supported flush or completion procedure is required before treating a write as persistent or removing power?",
                    "kind": "action",
                    "id": "performance-and-write-completion-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "condition-and-failure-assessment",
        "name": "Condition and failure assessment",
        "description": "Connects operating state and diagnostic evidence to decisions about continued access.",
        "rationale": "Unreadable data can arise from the medium, drive mechanism, power or connection, and further access can have different consequences.",
        "layers": [
          {
            "id": "readiness-and-symptoms",
            "name": "Readiness and symptoms",
            "description": "Records observable states and symptoms before attributing a failure.",
            "findings": [
              {
                "id": "access-failure-localisation",
                "name": "Access failure localisation",
                "description": "Distinguish absent media, spin-up failure, connection loss and read errors while retaining uncertainty about their causes.",
                "questions": [
                  {
                    "text": "What state, error reports, unusual sounds or interruptions occur, and under which access conditions?",
                    "kind": "measurement",
                    "id": "access-failure-localisation-q01"
                  },
                  {
                    "text": "What evidence distinguishes a media defect from a drive mechanism, cable, bridge or power problem?",
                    "kind": "boundary",
                    "id": "access-failure-localisation-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "diagnostics-and-recovery",
            "name": "Diagnostics and recovery",
            "description": "Assesses the evidential value and operational cost of diagnostic actions.",
            "findings": [
              {
                "id": "health-evidence-and-next-action",
                "name": "Health evidence and next action",
                "description": "Record the origin, time and coverage of supported diagnostics and choose further activity according to symptoms and the importance of the data.",
                "questions": [
                  {
                    "text": "Which health counters or self-tests are supported, and what documentation explains their interpretation for this drive?",
                    "kind": "provenance",
                    "id": "health-evidence-and-next-action-q01"
                  },
                  {
                    "text": "Should the next action be a limited read, imaging, a self-test, power-down or specialist recovery given the symptoms and data-preservation objective?",
                    "kind": "action",
                    "id": "health-evidence-and-next-action-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "handling-and-media-lifecycle",
        "name": "Handling and media lifecycle",
        "description": "Governs physical handling, media changes and the final disposition of stored data.",
        "rationale": "Disk rotation, removable-media mechanisms and persistent recordings create action prerequisites that a generic object model would miss.",
        "layers": [
          {
            "id": "installation-and-ejection",
            "name": "Installation and ejection",
            "description": "Covers permitted handling and transitions between operating and removable states.",
            "findings": [
              {
                "id": "safe-mechanism-transitions",
                "name": "Safe mechanism transitions",
                "description": "Record the drive-specific prerequisites for movement, disconnection, media ejection and maintenance.",
                "questions": [
                  {
                    "text": "What documented limits apply to orientation, shock, temperature and handling while the disk is spinning?",
                    "kind": "provenance",
                    "id": "safe-mechanism-transitions-q01"
                  },
                  {
                    "text": "Which operations must complete and which locks or loading mechanisms must be released before media removal or drive disconnection?",
                    "kind": "action",
                    "id": "safe-mechanism-transitions-q02"
                  }
                ]
              }
            ]
          },
          {
            "id": "data-disposition",
            "name": "Data disposition",
            "description": "Distinguishes reusing the mechanism from clearing or destroying its recording medium.",
            "findings": [
              {
                "id": "sanitisation-scope-and-evidence",
                "name": "Sanitisation scope and evidence",
                "description": "Record the authorised disposition of the data, the method supported by the particular technology, and evidence of completion without equating formatting with sanitisation.",
                "questions": [
                  {
                    "text": "Which media contain the data at retirement, including any disk removed from the drive?",
                    "kind": "boundary",
                    "id": "sanitisation-scope-and-evidence-q01"
                  },
                  {
                    "text": "What authorised sanitisation or destruction method is applicable, and what evidence can establish its completion and limitations?",
                    "kind": "action",
                    "id": "sanitisation-scope-and-evidence-q02"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "evidence-and-external-alignment",
        "name": "Evidence and external alignment",
        "description": "What the world already says about this thing, gathered so the model can be checked against it.",
        "rationale": "A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.",
        "layers": [
          {
            "id": "reported-evidence",
            "name": "Reported evidence",
            "description": "Findings from the breadth pass, kept separate from the structural claims.",
            "findings": [
              {
                "id": "evidence-confidence-notes",
                "name": "Check these first",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "No sense is recorded: confirm whether the registry intends the broad rotating-media category or specifically a hard disk drive.",
                  "Capacity, speed and form-factor examples describe hard disk drives; they do not characterize every disk-drive kind, and nominal inch sizes are not exact enclosure dimensions.",
                  "This is recalled knowledge, with no sources consulted; applicable interface specifications and their editions depend on the drive subtype and generation."
                ],
                "questions": [
                  {
                    "id": "evidence-confidence-notes-q01",
                    "text": "Which of these check these first hold for the sense of disk drive this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-kinds",
                "name": "Kinds and varieties",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "Hard disk drive",
                  "Floppy disk drive",
                  "Optical disc drive",
                  "Magneto-optical disk drive"
                ],
                "questions": [
                  {
                    "id": "evidence-kinds-q01",
                    "text": "Which of these kinds and varieties hold for the sense of disk drive this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-identifiers",
                "name": "Identifiers and schemes",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  {
                    "scheme": "Manufacturer model number and serial number",
                    "value_or_pattern": "Manufacturer-specific alphanumeric strings",
                    "note": "The model number identifies a product design or variant; the serial number identifies an individual unit."
                  },
                  {
                    "scheme": "World Wide Name (WWN)",
                    "value_or_pattern": "Commonly a 64-bit identifier represented in hexadecimal",
                    "note": "Supported by many hard disk drives for persistent identification; not universal across disk-drive kinds."
                  }
                ],
                "questions": [
                  {
                    "id": "evidence-identifiers-q01",
                    "text": "Which of these identifiers and schemes hold for the sense of disk drive this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-standards-and-regulation",
                "name": "Standards and regulation",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "ATA command-set standards - INCITS T13.",
                  "SCSI command-set standards - INCITS T10.",
                  "Serial ATA specifications - Serial ATA International Organization (SATA-IO)."
                ],
                "questions": [
                  {
                    "id": "evidence-standards-and-regulation-q01",
                    "text": "Which of these standards and regulation hold for the sense of disk drive this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-real-world-use",
                "name": "Real-world use",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "Storing operating systems, applications and user files in computers.",
                  "Providing bulk storage in servers and storage arrays.",
                  "Keeping backups on internal, external or removable disk media.",
                  "Reading and recording optical media for software distribution, audiovisual playback and data exchange.",
                  "Accessing legacy data and software on floppy disks."
                ],
                "questions": [
                  {
                    "id": "evidence-real-world-use-q01",
                    "text": "Which of these real-world use hold for the sense of disk drive this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-measurements",
                "name": "Typical measurements",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  {
                    "quantity": "Hard disk drive storage capacity",
                    "typical_range": "Hundreds of gigabytes to tens of terabytes, depending on generation and application",
                    "unit": "GB or TB"
                  },
                  {
                    "quantity": "Common hard disk drive spindle speeds",
                    "typical_range": "5400-7200; some enterprise designs use 10000-15000",
                    "unit": "rpm"
                  },
                  {
                    "quantity": "Common hard disk drive nominal form factors",
                    "typical_range": "2.5 or 3.5",
                    "unit": "inch"
                  }
                ],
                "questions": [
                  {
                    "id": "evidence-measurements-q01",
                    "text": "Which of these typical measurements hold for the sense of disk drive this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-failure-modes-and-hazards",
                "name": "Failure modes and hazards",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  "Motor, bearing or actuator failure can prevent rotation or accurate head positioning.",
                  "Head contact with magnetic platters can damage the recording surface and destroy data.",
                  "Media deterioration, scratches or contamination can cause read errors and data loss.",
                  "Controller, firmware or power faults can make data inaccessible or interrupt writes.",
                  "Shock, vibration and excessive heat can impair operation or shorten service life."
                ],
                "questions": [
                  {
                    "id": "evidence-failure-modes-and-hazards-q01",
                    "text": "Which of these failure modes and hazards hold for the sense of disk drive this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              },
              {
                "id": "evidence-neighbours",
                "name": "Neighbouring kinds and how to tell them apart",
                "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                "evidence": [
                  {
                    "name": "Solid-state drive",
                    "difference": "Stores data electronically without a rotating disk, although operating systems and commercial terminology may group it with disk drives."
                  },
                  {
                    "name": "Disk or disc",
                    "difference": "The recording medium itself; the drive supplies the mechanism and electronics that access it."
                  },
                  {
                    "name": "Hard disk drive",
                    "difference": "A subtype using rigid magnetic platters; disk drive also includes floppy and optical mechanisms."
                  },
                  {
                    "name": "Tape drive",
                    "difference": "Moves recording tape past a head instead of rotating a disk."
                  },
                  {
                    "name": "Logical volume",
                    "difference": "An addressable storage abstraction that can occupy part of a physical drive or span multiple drives."
                  }
                ],
                "questions": [
                  {
                    "id": "evidence-neighbours-q01",
                    "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of disk drive this model covers, and on what evidence?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Does vr.tr.disk-drive denote all drives using disk-shaped media, only hard disk drives, or a broader storage-device category that includes SSDs?",
    "Which existing Vercy world model or registry entry already owns any overlapping disk-drive concept and should be linked instead of duplicated?",
    "Which interface, media-format, safety and sanitisation standards apply to each included drive technology, and which issuing bodies and editions should be recorded?",
    "What sourced capacity, physical-dimension, power and performance ranges are useful for the included drive families without implying universal limits?",
    "Which technology-specific diagnostic indicators and handling procedures can support decisions reliably, especially when interface bridges hide commands or health information?"
  ],
  "statistics": {
    "bundles": 6,
    "layers": 11,
    "findings": 18,
    "questions": 28
  }
}
