{
  "schemaVersion": 1,
  "productId": "western-digital-wd-red-pro-wd202kfgx-20tb",
  "exactMpn": "WD202KFGX",
  "runId": "buying-research-full-grok-20260911",
  "recordedAt": "2026-09-11T09:26:29.473741+00:00",
  "subject": {
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    "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": [
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      ]
    },
    {
      "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": "b07-grok",
      "label": "Grok 4.6",
      "provider": "xai",
      "model": "grok-4.6",
      "effort": "xhigh",
      "identityBasis": "Verified execution receipt",
      "sessionId": "01a08f3b-5418-768b-af04-8075a95175c1"
    },
    {
      "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": "310ee7553e264da656c37642f6d9511417b97f21d1f74c53207aa954f636884a",
      "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": "310ee7553e264da656c37642f6d9511417b97f21d1f74c53207aa954f636884a",
      "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/western-digital-wd-red-pro-wd202kfgx-20tb.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": "310ee7553e264da656c37642f6d9511417b97f21d1f74c53207aa954f636884a",
      "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": "b07-grok",
      "role": "research-and-self-check",
      "status": "completed",
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      "researchedAt": "2026-09-11"
    },
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      "actorId": "current-codex-root",
      "role": "editorial-correction",
      "status": "completed",
      "inputSubjectSha256": "47a5c17fe68866d1feb8f4e3d0048c2a5fa7ced172ba80a2a9839d295ab0f7b7",
      "subjectSha256": "6f70fb63ccce9ddd06a24c83b6c3c6a35ecc1e9bc805ac4ff3c00af84fc528da",
      "changes": [
        {
          "field": "readerGuide/offers/audit",
          "change": "Removed unrelated template copy, recorded independently read related-model originals and their limitations; qualified Canadian marketplace shipping/OEM warranty where relevant."
        }
      ]
    },
    {
      "actorId": "current-codex-root",
      "role": "independent-review",
      "status": "completed",
      "subjectSha256": "6f70fb63ccce9ddd06a24c83b6c3c6a35ecc1e9bc805ac4ff3c00af84fc528da",
      "reviewedAt": "2026-09-11T09:26:29.473741+00:00",
      "scope": "Exact official column and revision differences; related-model review identity and supported interpretation; dated primary offers and source archive.",
      "evidenceChecks": [
        "Parent visually checked January2025 exact-model specification columns and footnotes earlier in this batch; air/helium, power, acoustics, OptiNAND and temperature distinctions retained.",
        "Original related-model article bodies read with precise per-source scope in audit; no same-capacity performance promoted into exact-MPN review cards.",
        "Newegg primary selected offer independently read; dates preserved; historical rows not re-dated.",
        "No new indexing or scoring approval. Missing exact-MPN tests, compatibility and inaccessible merchant evidence remain explicit."
      ]
    }
  ],
  "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": "Western Digital WD Red Pro data sheet — January 2025",
      "url": "https://www.westerndigital.com/content/dam/doc-library/en_us/assets/public/western-digital/product/internal-drives/wd-red-pro-hdd/data-sheet-wd-red-pro-hdd.pdf",
      "kind": "official",
      "checkedAt": "2026-09-11",
      "locator": "January 2025 family PDF, WD202KFGX column plus footnotes 1–8; highlights 'unlimited # of bays'",
      "readAction": "opened",
      "readScope": "January 2025 family PDF, WD202KFGX column plus footnotes 1–8; highlights 'unlimited # of bays'",
      "readingActorId": "b07-grok",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "c5574ccdeaa941cad2cf2fa04a98b9d29f9bbd48fbeae412ebdafaa54430e35b",
          "mimeType": "application/pdf",
          "sourceUrl": "https://www.westerndigital.com/content/dam/doc-library/en_us/assets/public/western-digital/product/internal-drives/wd-red-pro-hdd/data-sheet-wd-red-pro-hdd.pdf",
          "description": "January 2025 WD Red Pro data sheet"
        },
        {
          "sha256": "49d1742d556c138c3e9b2da9d541012866652c6fd771a18af3994382bf794ab1",
          "mimeType": "text/plain",
          "sourceUrl": "https://www.westerndigital.com/content/dam/doc-library/en_us/assets/public/western-digital/product/internal-drives/wd-red-pro-hdd/data-sheet-wd-red-pro-hdd.pdf",
          "description": "pdftotext -layout extract"
        }
      ]
    },
    {
      "id": "merchant-b-h-1",
      "title": "B&H: WD202KFGX historical US listing",
      "url": "https://www.bhphotovideo.com/c/product/1875007-REG/wd_wd202kfgx_spckwn0_wd_red_pro_20tb.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 $953.99. Any usable 2026-09-10 main offer is recorded separately rather than overwriting this historical observation.",
      "readAction": "blocked",
      "readScope": "HTTP 403 challenge HTML 2026-09-11; 2026-08-30 offer timestamp not edited",
      "readingActorId": "b07-grok",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "3726c321440549a56b0bc31442df0b2d18dd45085bfa03fc5fc6c9bac9f0c0b4",
          "mimeType": "text/html",
          "sourceUrl": "https://www.bhphotovideo.com/c/product/1875007-REG/wd_wd202kfgx_spckwn0_wd_red_pro_20tb.html",
          "description": "B&H 403 body"
        }
      ]
    },
    {
      "id": "merchant-newegg-2",
      "title": "Newegg: WD202KFGX historical US listing",
      "url": "https://www.newegg.com/western-digital-red-pro-wd202kfgx-20tb-enterprise-nas-hard-drives-7200-rpm/p/N82E16822234583",
      "kind": "merchant",
      "checkedAt": "2026-08-31",
      "locator": "Catalog record dated 2026-08-31: exact MPN, new condition, seller status marketplace-unverified, availability listed. No historical price adopted for this URL. Any usable 2026-09-10 main offer is recorded separately rather than overwriting this historical observation.",
      "readAction": "reused",
      "readScope": "Same Newegg URL reopened 2026-09-11; this source id keeps the older dated merchant row and is not a second live priced offer",
      "readingActorId": "b07-grok",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "5600a2262c5e798b13db183b82388f1f8de3b53fcd691a5f5081e1cba18da31c",
          "mimeType": "text/html",
          "sourceUrl": "https://www.newegg.com/western-digital-red-pro-wd202kfgx-20tb-enterprise-nas-hard-drives-7200-rpm/p/N82E16822234583",
          "description": "Newegg PDP HTML 2026-09-11"
        }
      ]
    },
    {
      "id": "merchant-western-digital-3",
      "title": "Western Digital: WD202KFGX historical US listing",
      "url": "https://www.westerndigital.com/products/internal-drives/wd-red-pro-sata-hdd?sku=WD202KFGX",
      "kind": "merchant",
      "checkedAt": "2026-08-31",
      "locator": "Catalog record dated 2026-08-31: exact MPN, new condition, seller status manufacturer, availability listed. No historical price adopted for this URL. Any usable 2026-09-10 main offer is recorded separately rather than overwriting this historical observation.",
      "readAction": "opened",
      "readScope": "Catalog record dated 2026-08-31: exact MPN, new condition, seller status manufacturer, availability listed. No historical price adopted for this URL. Any usable 2026-09-10 main offer is recorded separately rather than overwriting this historical observation.",
      "readingActorId": "b07-grok",
      "checkedOn": "2026-09-11",
      "materials": []
    },
    {
      "id": "current-newegg-1-20260910",
      "title": "Newegg: WD202KFGX current US new listing",
      "url": "https://www.newegg.com/western-digital-red-pro-wd202kfgx-20tb-enterprise-nas-hard-drives-7200-rpm/p/N82E16822234583",
      "kind": "merchant",
      "checkedAt": "2026-09-10",
      "locator": "Exact MPN in H1; selected main offer shows Add to cart, seller Newegg, and a visible price of $847.99.",
      "readAction": "reused",
      "readScope": "2026-09-11 primary .product-seller-sold-by pane reread; other-seller popover ignored; displayed offer checkedAt remains 2026-09-10",
      "readingActorId": "b07-grok",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "5600a2262c5e798b13db183b82388f1f8de3b53fcd691a5f5081e1cba18da31c",
          "mimeType": "text/html",
          "sourceUrl": "https://www.newegg.com/western-digital-red-pro-wd202kfgx-20tb-enterprise-nas-hard-drives-7200-rpm/p/N82E16822234583",
          "description": "Newegg PDP HTML 2026-09-11"
        }
      ]
    },
    {
      "id": "official-product-page",
      "title": "WD Red Pro NAS Hard Drive — 20TB US product page",
      "url": "https://www.westerndigital.com/products/internal-drives/wd-red-pro-sata-hdd?sku=WD202KFGX",
      "kind": "official",
      "checkedAt": "2026-09-11",
      "locator": "Key features, Specifications (Capacity/Model Number/Transfer Rate/Compatibility), FAQ comparing Red Pro vs Red Plus",
      "readAction": "opened",
      "readScope": "Key features, Specifications (Capacity/Model Number/Transfer Rate/Compatibility), FAQ comparing Red Pro vs Red Plus",
      "readingActorId": "b07-grok",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "293a285b61f081b85fdd1796751e469702758f7f6d03ac92443531295154acd7",
          "mimeType": "text/html",
          "sourceUrl": "https://www.westerndigital.com/products/internal-drives/wd-red-pro-sata-hdd?sku=WD202KFGX",
          "description": "US family PDP HTML"
        }
      ]
    },
    {
      "id": "related-toms-wd201",
      "title": "Western Digital Red Pro 20TB HDD Review: OptiNAND on a Platter",
      "url": "https://www.tomshardware.com/reviews/western-digital-red-pro-20tb-hdd",
      "kind": "review",
      "checkedAt": "2026-09-11",
      "locator": "Specifications table Model # WD201KFGX; OptiNAND/iNAND teardown page 1",
      "readAction": "opened",
      "readScope": "Parent read both full original article bodies: exact WD201 identity, teardown, workload methods and conclusion. Images not independently measured; no graph-only numeric claim adopted.",
      "readingActorId": "current-codex-root",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "6786a73786eceba9dcd411e623788230cca2268b2adc928645e39797d33da37a",
          "mimeType": "text/html",
          "sourceUrl": "https://www.tomshardware.com/reviews/western-digital-red-pro-20tb-hdd",
          "description": "Original related-model article page independently read by parent"
        },
        {
          "sha256": "8a597c0c6024ef04d24a1792d84c66baeaf9e920760aab75db75f6881fc28bff",
          "mimeType": "text/html",
          "sourceUrl": "https://www.tomshardware.com/reviews/western-digital-red-pro-20tb-hdd/2",
          "description": "Original related-model article page independently read by parent"
        }
      ]
    }
  ],
  "coverage": {
    "productId": "western-digital-wd-red-pro-wd202kfgx-20tb",
    "roundStatus": "部分完成",
    "dimensions": [
      {
        "id": "identity",
        "status": "已核实",
        "evidenceIds": [
          "ev-official-datasheet-202501",
          "ev-official-product-page"
        ],
        "remainingFields": [],
        "nextStep": "Keep matching WD202KFGX on the delivered label.",
        "reusedVsReread": "January 2025 PDF column reread plus US PDP HTML."
      },
      {
        "id": "specifications",
        "status": "已核实",
        "evidenceIds": [
          "ev-official-datasheet-202501",
          "ev-official-product-page"
        ],
        "remainingFields": [
          "Vibration numeric limits unpublished",
          "Logical/physical sector sizes unpublished"
        ],
        "nextStep": "Do not copy sibling-column numbers.",
        "reusedVsReread": "Footnotes 5 vs 6 attached per MTBF/workload rows."
      },
      {
        "id": "software-limits",
        "status": "部分覆盖",
        "evidenceIds": [
          "ev-official-product-page"
        ],
        "remainingFields": [
          "No Synology/QNAP per-MPN HCL dump"
        ],
        "nextStep": "Browser pass on vendor compatibility search for this MPN.",
        "reusedVsReread": "WD TLER/NASware/unlimited-bay claims read; Synology/QNAP URLs were shells."
      },
      {
        "id": "direct-measurement",
        "status": "已检索未找到",
        "evidenceIds": [],
        "remainingFields": [
          "No WD202KFGX original lab"
        ],
        "nextStep": "Watch for an exact-MPN test.",
        "reusedVsReread": "Baseline reviews reread; KitGuru added for 22TB."
      },
      {
        "id": "related-experience",
        "status": "已核实",
        "evidenceIds": [
          "ev-related-toms-wd201"
        ],
        "remainingFields": [
          "NASCompares 20/22TB HTTP 403"
        ],
        "nextStep": "Keep sibling numbers off the target performance fields.",
        "reusedVsReread": "Opened Hardwareluxx/TechRadar/Tom's/igor’sLAB/APH as applicable."
      },
      {
        "id": "us-new-pdp",
        "status": "部分覆盖",
        "evidenceIds": [
          "ev-pdp-newegg-reread"
        ],
        "remainingFields": [
          "B&H 403",
          "Amazon bot wall",
          "WD store price template"
        ],
        "nextStep": "Browser pass for B&H/Amazon only; Newegg primary pane already reread.",
        "reusedVsReread": "Primary sold-by used; popover ignored; 2026-09-10 timestamps kept."
      },
      {
        "id": "buying-judgment",
        "status": "已核实",
        "evidenceIds": [
          "ev-official-datasheet-202501"
        ],
        "remainingFields": [],
        "nextStep": "Independent review.",
        "reusedVsReread": "Product-specific air/helium and sibling traps written into readerGuide."
      },
      {
        "id": "video",
        "status": "已检索未找到",
        "evidenceIds": [],
        "remainingFields": [
          "No exact-WD202KFGX original video candidate this round."
        ],
        "nextStep": "No exact-MPN video candidate this round.",
        "reusedVsReread": "Filtered per product; one failed YouTube extractor is not a batch-wide video block."
      }
    ]
  },
  "retiredRecords": [
    {
      "id": "merchant-newegg-2-new",
      "reason": "Same Newegg PDP as the later primary-pane observation, but seller was 'Marketplace seller not reverified' with no qualified new price. Archived rather than displayed beside the Sold-by Newegg/PC Parts Hub card. Original 2026-08-31 timestamp not edited.",
      "record": {
        "id": "merchant-newegg-2-new",
        "merchant": "Newegg",
        "seller": "Marketplace seller not reverified",
        "url": "https://www.newegg.com/western-digital-red-pro-wd202kfgx-20tb-enterprise-nas-hard-drives-7200-rpm/p/N82E16822234583",
        "exactMpn": "WD202KFGX",
        "configuration": "One 20TB 3.5-inch SATA HDD",
        "priceUsd": null,
        "currency": "USD",
        "availability": "unknown",
        "condition": "new",
        "conditionBasis": "Historical catalog record classified the direct listing as new on 2026-08-31; this row is not refreshed by the separate 2026-09-10 check.",
        "checkedAt": "2026-08-31",
        "sourceId": "merchant-newegg-2",
        "evidenceLocator": "Historical exact-MPN catalog listing; no historical price adopted for this url; any usable 2026-09-10 main offer is recorded as a separate row.",
        "shipping": "Shipping cost and US delivery eligibility require a fresh check.",
        "purchaseConditions": "Historical reference only. Recheck seller, stock, price, quantity, warranty channel, shipping and tax before ordering."
      }
    }
  ],
  "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."
  }
}