{
  "schemaVersion": 1,
  "productId": "toshiba-n300-hdwg81exzsta-14tb",
  "exactMpn": "HDWG81EXZSTA",
  "runId": "buying-research-full-grok-20260911",
  "recordedAt": "2026-09-11T08:37:38.338137+00:00",
  "subject": {
    "sha256": "d15164bcdb901b63b319c1cbe9e6676d9211ef8a246ee86d88beb6d5cff4e61c",
    "hashKind": "research-payload-sha256",
    "algorithm": "SHA-256 of UTF-8 JSON with recursively sorted object keys, no optional whitespace, Unicode unescaped; remove only top-level provenance, reviewedAt, reviewedBy, editorialStatus."
  },
  "actors": [
    {
      "id": "legacy-qnap_research",
      "label": "GPT-5.6 Sol",
      "provider": "openai",
      "model": "gpt-5.6-sol",
      "effort": "xhigh",
      "agentRoleName": "qnap_research",
      "identityBasis": "Verified dispatch model selection and matching dated run report; not a provider-side attestation.",
      "evidenceRefs": [
        "reports/buying-research-all-products-20260910/README.md"
      ]
    },
    {
      "id": "legacy-hdd_research",
      "label": "GPT-5.6 Sol",
      "provider": "openai",
      "model": "gpt-5.6-sol",
      "effort": "xhigh",
      "agentRoleName": "hdd_research",
      "identityBasis": "Verified dispatch model selection and matching dated run report; not a provider-side attestation.",
      "evidenceRefs": [
        "reports/buying-research-all-products-20260910/README.md"
      ]
    },
    {
      "id": "legacy-other_nas_research",
      "label": "GPT-5.6 Sol",
      "provider": "openai",
      "model": "gpt-5.6-sol",
      "effort": "xhigh",
      "agentRoleName": "other_nas_research",
      "identityBasis": "Verified dispatch model selection and matching dated run report; not a provider-side attestation.",
      "evidenceRefs": [
        "reports/buying-research-all-products-20260910/README.md"
      ]
    },
    {
      "id": "legacy-codex-root",
      "label": "GPT-6 (Codex)",
      "provider": "openai",
      "model": null,
      "modelFamily": "GPT-6",
      "effort": null,
      "agentRoleName": "root",
      "identityBasis": "Codex host model family confirmed; exact model variant/effort not preserved in the product audit. Unknown fields remain null.",
      "evidenceRefs": [
        "reports/buying-research-all-products-20260910/README.md",
        "reports/buying-research-all-products-20260910/browser-acceptance.json"
      ]
    },
    {
      "id": "b05-grok",
      "label": "Grok 4.6",
      "provider": "xai",
      "model": "grok-4.6",
      "effort": "xhigh",
      "identityBasis": "Verified execution receipt",
      "sessionId": "01a08f27-b2a6-7234-b0ef-bc62f3e0ce36"
    },
    {
      "id": "current-codex-root",
      "label": "GPT-6 (Codex)",
      "provider": "openai",
      "modelFamily": "GPT-6",
      "model": null,
      "effort": null,
      "identityBasis": "Host model family confirmed; exact variant and effort not asserted."
    }
  ],
  "events": [
    {
      "id": "legacy-20260910-1",
      "actorId": "legacy-hdd_research",
      "role": "research-and-self-review",
      "scope": "research and self-review",
      "legacyLabel": "/root/hdd_research — research and self-review",
      "reviewedAt": "2026-09-10T02:57:11.326059+00:00",
      "subjectSha256": "99e66c7dbcc3224519b4c4b310ba7c9bf19062028b63988166edb7875972706f",
      "subjectHashKind": "raw-file-sha256",
      "recordedAt": "2026-09-11T05:49:51.110527+00:00",
      "status": "historical-record",
      "evidenceRefs": [
        "reports/buying-research-all-products-20260910/editorial-decisions.json"
      ]
    },
    {
      "id": "legacy-20260910-2",
      "actorId": "legacy-other_nas_research",
      "role": "independent-evidence-review",
      "scope": "independent evidence review",
      "legacyLabel": "/root/other_nas_research — independent evidence review",
      "reviewedAt": "2026-09-10T02:57:11.326059+00:00",
      "subjectSha256": "99e66c7dbcc3224519b4c4b310ba7c9bf19062028b63988166edb7875972706f",
      "subjectHashKind": "raw-file-sha256",
      "recordedAt": "2026-09-11T05:49:51.110527+00:00",
      "status": "historical-record",
      "evidenceRefs": [
        "reports/buying-research-all-products-20260910/owners/nas_other/reviews-by-nas-other/toshiba-n300-hdwg81exzsta-14tb.json"
      ]
    },
    {
      "id": "legacy-20260910-3",
      "actorId": "legacy-codex-root",
      "role": "integration-and-page-review",
      "scope": "integration and local page review",
      "legacyLabel": "/root — integration and local page review",
      "reviewedAt": "2026-09-10T02:57:11.326059+00:00",
      "subjectSha256": "99e66c7dbcc3224519b4c4b310ba7c9bf19062028b63988166edb7875972706f",
      "subjectHashKind": "raw-file-sha256",
      "recordedAt": "2026-09-11T05:49:51.110527+00:00",
      "status": "historical-record",
      "evidenceRefs": [
        "reports/buying-research-all-products-20260910/editorial-decisions.json"
      ]
    },
    {
      "actorId": "b05-grok",
      "role": "research-and-self-check",
      "status": "completed",
      "subjectSha256": "d15164bcdb901b63b319c1cbe9e6676d9211ef8a246ee86d88beb6d5cff4e61c",
      "researchedAt": "2026-09-11"
    },
    {
      "actorId": "current-codex-root",
      "role": "independent-review",
      "status": "completed",
      "subjectSha256": "d15164bcdb901b63b319c1cbe9e6676d9211ef8a246ee86d88beb6d5cff4e61c",
      "reviewedAt": "2026-09-11T08:37:38.338137+00:00",
      "scope": "Exact HDWG81EXZSTA manufacturer column, capacity/revision identity, material warranty/temperature/workload footnotes; bounded related-test applicability and dated merchant retention. No exact-MPN original measurement is claimed; partial coverage and existing noindex preserved.",
      "evidenceChecks": [
        "Parent visually checked exact assigned columns in original Toshiba sales sheet and relevant footnotes; no unreported startup current/sleep power/seek acoustics invented.",
        "July2026 N300 target columns were independently read on pages3–5 and all footnotes on page7; capacity-specific8/12-bay classes and180TB/year retained. Prior March2025 N300Pro16TB column and pages3/4/5/7 checked separately:24bays,300TB/year,512MB,281MB/s,1.2Mhours,1e14 UER,7.48/4.14W,5years.",
        "Footnotes explicitly separate40°C ambient workload from average HDA surface≤40°C reliability conditions; 5–60°C operation is not an MTTF guarantee. Annualization follows source formula.",
        "Related original evidence is labelled by actual capacity/revision, never copied as exact-SKU measurements; original parent Tom12TB/20TB label photos and official bulk-to-retail bridge checked, article12TB14TB-code typo retained as conflict.",
        "Prior merchant prices/dates unchanged, blocked current attempts and video/full-chart gaps explicit; no new live quote or new indexing approval."
      ]
    }
  ],
  "sourceOrigins": {
    "status": "not-inferred-per-source",
    "explanation": "The recorded page researchers/reviewers do not prove who originally discovered or reread each inherited source. Source-level historical author attribution is unknown unless a specific source audit establishes it."
  },
  "sources": [
    {
      "id": "official-datasheet",
      "title": "Toshiba N300 sales sheet TAEC-2839 (2026-07)",
      "url": "https://storage.toshiba.com/docs/product-datasheets/TAEC-2839_N300_Sales-Sheets-Updates_Low-Res_Locked.pdf",
      "kind": "official",
      "checkedAt": "2026-09-11",
      "locator": "Retail-packaging column HDWG81EXZSTA; Drive Bays Supported up to 12. TAEC-2839 closing page footnotes 6–7 (2026.07.10-2839-R2.0): workload annualized under 40°C ambient; MTTF assumes average HDA surface ≤40°C; surface >40°C may degrade reliability and reduce warranty. Footnote 4: host compatibility varies.",
      "readAction": "opened",
      "readScope": "Column pages 3–5 plus independently viewed parent-7.png footnotes 6–7 (40°C ambient workload / HDA surface MTTF).",
      "readingActorId": "b05-grok",
      "observedAt": "2026-09-11T08:14:44Z",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "147200ea3f5205095bd2ce18b89a4ff5dd41cc832c5dd10b4b8803d6a1ff0a62",
          "mimeType": "application/pdf",
          "sourceUrl": "https://storage.toshiba.com/docs/product-datasheets/TAEC-2839_N300_Sales-Sheets-Updates_Low-Res_Locked.pdf",
          "description": "Current N300 sales sheet linked from storage.toshiba.com/n300, created 2026-07-31"
        },
        {
          "sha256": "eb588018f3dadf9dc3f3344f1ea6f6346d69ce6c445000db54284560a2cc5ca8",
          "mimeType": "image/png",
          "sourceUrl": "https://storage.toshiba.com/docs/product-datasheets/TAEC-2839_N300_Sales-Sheets-Updates_Low-Res-Locked.pdf",
          "description": "TAEC-2839 page 7 footnotes 1–16, revision 2026.07.10-2839-R2.0"
        }
      ]
    },
    {
      "id": "merchant-b-h-1",
      "title": "B&H: HDWG81EXZSTA historical US listing",
      "url": "https://www.bhphotovideo.com/c/product/1952535-REG/toshiba_hdwg81exzsta_n300_nas_hard_drive.html",
      "kind": "merchant",
      "checkedAt": "2026-08-30",
      "locator": "Catalog record dated 2026-08-30: exact MPN, new condition, seller status retailer, availability in-stock. Historical catalog reference price $609.99. Any usable 2026-09-10 main offer is recorded separately rather than overwriting this historical observation.",
      "readAction": "blocked",
      "readScope": "2026-09-11 live PDP reread failed or was not a usable selected offer; historical row reused without a new timestamp",
      "readingActorId": "b05-grok",
      "checkedOn": "2026-09-11",
      "materials": []
    },
    {
      "id": "official-datasheet-taec2564",
      "title": "Toshiba N300 sales sheet TAEC2564 (2026-02-25 R6.0)",
      "url": "https://storage.toshiba.com/docs/product-datasheets/TAEC2564_Internal-HDD-Sales-Sheet-Redesign_N300English_Low-Res-Locked.pdf",
      "kind": "official",
      "checkedAt": "2026-09-11",
      "locator": "Retail column HDWG81EXZSTA reread from rendered pages 3–5; values matched TAEC-2839.",
      "readAction": "opened",
      "readScope": "pdftoppm pages 3–5; columns matched TAEC-2839 for assigned MPNs",
      "readingActorId": "b05-grok",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "0167fa6d3235cdacc77d3015b5ce79264d1ad840d7d79475c487c857a18640c2",
          "mimeType": "application/pdf",
          "sourceUrl": "https://storage.toshiba.com/docs/product-datasheets/TAEC2564_Internal-HDD-Sales-Sheet-Redesign_N300English_Low-Res-Locked.pdf",
          "description": "TAEC2564 2026.02.25-2564-R6.0 image PDF"
        }
      ]
    },
    {
      "id": "official-current-page",
      "title": "Toshiba N300 US product page",
      "url": "https://storage.toshiba.com/consumer-hdd/internal/n300",
      "kind": "official",
      "checkedAt": "2026-09-11",
      "locator": "Family maxima: up to 22TB, 298 MB/s, 1 GB cache, 12 bays, 180 TB/year, 3-year warranty; footnotes 1–14. Datasheet CTA points to TAEC-2839.",
      "readAction": "opened",
      "readScope": "Readable fetch plus saved HTML; family table and TAEC-2839 CTA",
      "readingActorId": "b05-grok",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "d85e6ab51ffbc8ffc211b057073dd6d8169d43d00da8b8d225ec07c253e22f9e",
          "mimeType": "text/html",
          "sourceUrl": "https://storage.toshiba.com/consumer-hdd/internal/n300",
          "description": "N300 product page HTML 2026-09-11"
        }
      ]
    },
    {
      "id": "official-naslink",
      "title": "NASLink firmware white paper (April 1, 2026)",
      "url": "https://storage.toshiba.com/docs/support-docs/naslink_toshiba_n300_whitepaper_en.pdf",
      "kind": "official",
      "checkedAt": "2026-09-11",
      "locator": "Family firmware description for N300 NAS/RAID mixed workloads; not an exact-MPN benchmark.",
      "readAction": "opened",
      "readScope": "pdftotext; abstract and §1 read",
      "readingActorId": "b05-grok",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "97094b64dab9c60f4491642266812982aa02b31830113d80a17859145e4146a9",
          "mimeType": "application/pdf",
          "sourceUrl": "https://storage.toshiba.com/docs/support-docs/naslink_toshiba_n300_whitepaper_en.pdf",
          "description": "NASLink white paper April 1, 2026"
        }
      ]
    },
    {
      "id": "related-toms-n300-18tb",
      "title": "Tom's Hardware: Toshiba N300 18TB HDD review",
      "url": "https://www.tomshardware.com/pc-components/hdds/toshiba-n300-18tb-hdd-review",
      "kind": "review",
      "checkedAt": "2026-09-11",
      "locator": "Tested HDWG51JXZSTA 18TB, not this MPN. Features page plus performance page 2; chart pixels not transcribed.",
      "readAction": "opened",
      "readScope": "Readable fetch of features + /2; tool mtwl6uipt0kyug / mtwl8h5af2tz9e",
      "readingActorId": "b05-grok",
      "checkedOn": "2026-09-11",
      "materials": []
    },
    {
      "id": "related-toms-hierarchy",
      "title": "Tom's Hardware HDD Benchmarks Hierarchy",
      "url": "https://www.tomshardware.com/features/hdd-benchmarks-hierarchy",
      "kind": "review",
      "checkedAt": "2026-09-11",
      "locator": "Summary table of Tom's prior HDD tests. N300 18TB row is HDWG51JXZSTA class, not this MPN.",
      "readAction": "opened",
      "readScope": "Hierarchy table rows for N300 18TB and N300 Pro 12/20TB; tool mtwlakoyh5f9w5",
      "readingActorId": "b05-grok",
      "checkedOn": "2026-09-11",
      "materials": []
    },
    {
      "id": "related-techradar-4tb",
      "title": "TechRadar: Toshiba N300 4TB NAS HDD review",
      "url": "https://www.techradar.com/pro/toshiba-n300-4tb-nas-hdd-review",
      "kind": "review",
      "checkedAt": "2026-09-11",
      "locator": "Tested HDWG740EZSTC 4TB / 512MB. AJA/ATTO/CDM table and Ugreen DXP4800 Plus 2.5GbE note.",
      "readAction": "opened",
      "readScope": "Full performance table HTML; tool mtwl8h5af2tz9e",
      "readingActorId": "b05-grok",
      "checkedOn": "2026-09-11",
      "materials": []
    },
    {
      "id": "related-hardwareluxx-16tb",
      "title": "Hardwareluxx: Toshiba N300 16TB test (2021)",
      "url": "https://www.hardwareluxx.de/index.php/artikel/hardware/storage/55192-toshiba-n300-nas-hdd-mit-16-tb-im-test.html",
      "kind": "review",
      "checkedAt": "2026-09-11",
      "locator": "Tested HDWG31GUZSVA / 512MB / 274 MB/s rated; not HDWG81GXZSTA.",
      "readAction": "opened",
      "readScope": "Identity HDWG31GUZSVA on page 1; later pages not fully extracted",
      "readingActorId": "b05-grok",
      "checkedOn": "2026-09-11",
      "materials": []
    },
    {
      "id": "related-kitguru-14tb",
      "title": "KitGuru: Toshiba N300 14TB HDWG21EEZSTA review (2019)",
      "url": "https://www.kitguru.net/components/hard-drives/simon-crisp/toshiba-n300-nas-14tb-hdwg21eezsta-hdd-review/all/1/",
      "kind": "review",
      "checkedAt": "2026-09-11",
      "locator": "Old 14TB helium SKU HDWG21EEZSTA, 256MB cache, ATTO ~271/272 MB/s.",
      "readAction": "opened",
      "readScope": "HDWG21EEZSTA ATTO 271/272 MB/s; tool mtwl8h5af2tz9e",
      "readingActorId": "b05-grok",
      "checkedOn": "2026-09-11",
      "materials": []
    }
  ],
  "coverage": {
    "productId": "toshiba-n300-hdwg81exzsta-14tb",
    "roundStatus": "部分完成",
    "dimensions": [
      {
        "id": "identity",
        "status": "已核实",
        "evidenceIds": [
          "ev-taec2839"
        ],
        "remainingFields": [
          "Confirm delivered label matches the full retail suffix, not bulk."
        ],
        "nextStep": "Keep bulk and replacement MPNs off this page's performance claims.",
        "reusedVsReread": "Exact column reread on TAEC-2839 or 2025 Pro sheet."
      },
      {
        "id": "specifications",
        "status": "已核实",
        "evidenceIds": [
          "ev-taec2839"
        ],
        "remainingFields": [
          "Startup current, standby/sleep power, seek acoustics still unpublished."
        ],
        "nextStep": "Do not fill unknowns from another capacity.",
        "reusedVsReread": "Round 3: footnotes 6–7 from TAEC-2839 p7 / Pro 2025 closing page added to workload, MTTF, warranty and operating-temperature notes."
      },
      {
        "id": "software-limits",
        "status": "部分覆盖",
        "evidenceIds": [
          "ev-naslink"
        ],
        "remainingFields": [
          "Up-to-12-bay rating is not a NAS HCL (footnote 4)."
        ],
        "nextStep": "Buyer must check the NAS vendor list for this MPN.",
        "reusedVsReread": "NASLink white paper opened; family only."
      },
      {
        "id": "direct-measurement",
        "status": "已检索未找到",
        "evidenceIds": [],
        "remainingFields": [
          "No adopted original test of HDWG81EXZSTA."
        ],
        "nextStep": "Watch for an exact-MPN lab with method and charts.",
        "reusedVsReread": "Exact-MPN searches plus known 2026-09-10 leads reread."
      },
      {
        "id": "related-experience",
        "status": "已核实",
        "evidenceIds": [
          "ev-toms-18tb",
          "ev-techradar-4tb"
        ],
        "remainingFields": [
          "Related labs are other capacities/revisions; Tom's review-page charts were not transcribed as target numbers."
        ],
        "nextStep": "Keep related findings in evidence/audit, not in reviews[].",
        "reusedVsReread": "Round 2 shortened buyer text; did not reread Tom's charts as target measurements."
      },
      {
        "id": "us-new-pdp",
        "status": "部分覆盖",
        "evidenceIds": [],
        "remainingFields": [
          "2026-09-11 live PDPs blocked; historical B&H/Amazon/Newegg/Best Buy rows not refreshed."
        ],
        "nextStep": "Parent browser pass on B&H, Adorama, Newegg and Amazon exact SKUs.",
        "reusedVsReread": "Historical offers retained with original checkedAt."
      },
      {
        "id": "buying-judgment",
        "status": "已核实",
        "evidenceIds": [
          "ev-taec2839"
        ],
        "remainingFields": [
          "Bay-class copy now matches the official up-to-12-bay column; indexing still blocked by missing exact-MPN original test."
        ],
        "nextStep": "Independent review; do not treat this draft as approval.",
        "reusedVsReread": "Judgment rewritten around the reread column and related-test boundary."
      },
      {
        "id": "video",
        "status": "已检索未找到",
        "evidenceIds": [],
        "remainingFields": [
          "Exact-MPN videos not given complete ASR/frames. Known related clips include 6UFvvdKueVo (wrong 16TB MPN) and d907R8yADuI (HDWG51G)."
        ],
        "nextStep": "Do not invent listening claims. Parent export only if an exact-MPN clip is later identified.",
        "reusedVsReread": "Not marked blocked; not fabricated."
      }
    ]
  },
  "retiredRecords": [],
  "originalMaterial": {
    "status": "per-source-records",
    "note": "Available original captures are retained locally with SHA-256. Public records contain source URLs and locators; they do not reproduce full third-party content. An absent capture is not a claim of a saved original."
  }
}