{
  "schemaVersion": 1,
  "productId": "western-digital-wd-red-plus-wd20efpx-2tb",
  "exactMpn": "WD20EFPX",
  "runId": "buying-research-full-grok-20260911",
  "recordedAt": "2026-09-11T09:00:59.176398+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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      ]
    },
    {
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      "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": [
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      ]
    },
    {
      "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": [
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      ]
    },
    {
      "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": "b06-grok",
      "label": "Grok 4.6",
      "provider": "xai",
      "model": "grok-4.6",
      "effort": "xhigh",
      "identityBasis": "Verified execution receipt",
      "sessionId": "01a08f2d-f21c-768f-ac36-185594364de5"
    },
    {
      "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": "bde17a7a875ff80be350f17d1bee646b1dad1f9b9af4744f1f4bb6c74ca22185",
      "subjectHashKind": "raw-file-sha256",
      "recordedAt": "2026-09-11T05:49:51.110527+00:00",
      "status": "historical-record",
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    },
    {
      "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",
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      "status": "historical-record",
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      ]
    },
    {
      "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": "bde17a7a875ff80be350f17d1bee646b1dad1f9b9af4744f1f4bb6c74ca22185",
      "subjectHashKind": "raw-file-sha256",
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    },
    {
      "actorId": "b06-grok",
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      "status": "completed",
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      "researchedAt": "2026-09-11"
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      "role": "editorial-correction",
      "status": "completed",
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      "changes": [
        {
          "field": "specifications/reviews/readerGuide",
          "change": "Added original-table workload and MTBF conditions; corrected legacy Pro bay limit; added omitted WD60 original chart values; reread WD120 original; clarified dated seller and measurement wording as applicable."
        }
      ]
    },
    {
      "actorId": "current-codex-root",
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      "reviewedAt": "2026-09-11T09:00:59.176398+00:00",
      "scope": "Exact official MPN specifications, power/acoustic/environment columns and footnotes; original test evidence and applicability; primary merchant states and dated retained offers. Partial coverage and original-image/video gaps remain explicit.",
      "evidenceChecks": [
        "Exact capacity/MPN columns and footnotes checked in original September2025 Plus or January2025 Pro tables; WD30 uses original March2023 table and remains explicitly absent from current table.",
        "Current official WD103 product page and Pro cover both say unlimited bay count; replaced stale24-bay claim. MTBF and annualized workload conditions preserved with correct Plus/Pro distinction.",
        "Primary Newegg original buy boxes inspected earlier and exact seller/price/stock/new flags verified; dated baseline quotations retained, unknown-seller duplicates retired with recorded reasons.",
        "No exact NAS HCL approval or new index approval inferred; RV/sector, video, inaccessible merchants and measurement gaps retained."
      ]
    }
  ],
  "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": "datasheet",
      "title": "WD Red Plus HDD data sheet (September 2025)",
      "url": "https://documents.westerndigital.com/content/dam/doc-library/en_us/assets/public/western-digital/product/internal-drives/wd-red-plus-hdd/data-sheet-western-digital-wd-red-plus-hdd.pdf",
      "kind": "official",
      "checkedAt": "2026-09-11",
      "locator": "September 2025 p.2 column WD20EFPX; footnotes 1–10",
      "readAction": "opened",
      "readScope": "pdftotext of downloaded September 2025 PDF",
      "readingActorId": "b06-grok",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "58fc4e4899ef088a8b4896b0ca44b10e473556249d0f6fc17bd1b0c63039bc8c",
          "mimeType": "application/pdf",
          "sourceUrl": "https://documents.westerndigital.com/content/dam/doc-library/en_us/assets/public/western-digital/product/internal-drives/wd-red-plus-hdd/data-sheet-western-digital-wd-red-plus-hdd.pdf",
          "description": "WD Red Plus DS September 2025"
        }
      ]
    },
    {
      "id": "offer-newegg",
      "title": "Newegg WD20EFPX product listing",
      "url": "https://www.newegg.com/red-plus-wd20efpx-2tb-hard-drive-for-nas-systems-5400-rpm/p/N82E16822234546",
      "kind": "merchant",
      "checkedAt": "2026-09-08T15:44:31.311865+00:00",
      "locator": "Primary offer sold and shipped by Newegg; Add to cart; limit 2 per customer; new standard listing.",
      "readAction": "opened",
      "readScope": "Saved Newegg PDP HTML",
      "readingActorId": "b06-grok",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "1cc79bb6f282ae3c680517b39bf1a0c20d118b9f3c05f8806521e6c5c592781f",
          "mimeType": "text/html",
          "sourceUrl": "https://www.newegg.com/red-plus-wd20efpx-2tb-hard-drive-for-nas-systems-5400-rpm/p/N82E16822234546",
          "description": "Newegg WD20EFPX"
        }
      ]
    },
    {
      "id": "offer-bandh",
      "title": "B&H WD20EFPX product listing",
      "url": "https://www.bhphotovideo.com/c/product/1790035-REG/wd_wd20efpx_spc4tn0_wd_red_plus_2tb.html",
      "kind": "merchant",
      "checkedAt": "2026-09-08T15:49:13.111291+00:00",
      "locator": "MFR WD20EFPX-SPC4TN0; exact base MPN, 2 TB and quantity 1; In Stock and Add to Cart.",
      "readAction": "not-attempted",
      "readScope": "Not re-fetched this round; dated offer reused without a new timestamp",
      "readingActorId": "b06-grok",
      "checkedOn": "2026-09-11",
      "materials": []
    },
    {
      "id": "offer-western-digital",
      "title": "Western Digital WD20EFPX product listing",
      "url": "https://www.westerndigital.com/products/internal-drives/wd-red-plus-sata-3-5-hdd?sku=WD20EFPX",
      "kind": "merchant",
      "checkedAt": "2026-09-08T15:44:30.405488+00:00",
      "locator": "Exact SKU title/model confirmed; price and inventory appear as unresolved template fields. No stock inference from hidden buttons.",
      "readAction": "opened",
      "readScope": "Saved manufacturer HTML shell; live USD not isolated from JS template",
      "readingActorId": "b06-grok",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "c74eb6d0d931e6317aa4a4afed8978e971309e82da0b924b2bbd3a13e80e199e",
          "mimeType": "text/html",
          "sourceUrl": "https://www.westerndigital.com/products/internal-drives/wd-red-plus-sata-3-5-hdd?sku=WD20EFPX",
          "description": "WD store WD20EFPX"
        }
      ]
    }
  ],
  "coverage": {
    "productId": "western-digital-wd-red-plus-wd20efpx-2tb",
    "roundStatus": "部分完成",
    "dimensions": [
      {
        "id": "identity",
        "status": "已核实",
        "evidenceIds": [
          "ev-datasheet"
        ],
        "remainingFields": [
          "Retail pack suffix on the delivered label still needs the buyer to match the MPN."
        ],
        "nextStep": "Keep exact suffix; do not merge same-capacity columns.",
        "reusedVsReread": "September 2025 / January 2025 PDFs reread via pdftotext."
      },
      {
        "id": "specifications",
        "status": "已核实",
        "evidenceIds": [
          "ev-datasheet",
          "ev-offer-newegg"
        ],
        "remainingFields": [
          "Logical/physical sector bytes; RV numeric limits."
        ],
        "nextStep": "Do not fill unknown cells.",
        "reusedVsReread": "PDF reread; baseline row order preserved."
      },
      {
        "id": "software-limits",
        "status": "部分覆盖",
        "evidenceIds": [
          "ev-datasheet"
        ],
        "remainingFields": [
          "Vendor HCL for a named NAS was not confirmed from an extracted compatibility table."
        ],
        "nextStep": "Check Synology/QNAP/Asustor list for the exact MPN before array purchase.",
        "reusedVsReread": "Datasheet 8-bay or unlimited-bay rating only."
      },
      {
        "id": "direct-measurement",
        "status": "已检索未找到",
        "evidenceIds": [],
        "remainingFields": [
          "No exact-MPN original lab with method."
        ],
        "nextStep": "Do not promote related SKUs into reviews[].",
        "reusedVsReread": "Exact reviews reread or still absent."
      },
      {
        "id": "related-experience",
        "status": "部分覆盖",
        "evidenceIds": [],
        "remainingFields": [],
        "nextStep": "Keep related numbers on the tested identity.",
        "reusedVsReread": "Tom's / TechRadar / Adorama / STH / Nero opened as applicable."
      },
      {
        "id": "us-new-pdp",
        "status": "部分覆盖",
        "evidenceIds": [
          "ev-offer-newegg",
          "ev-offer-bandh",
          "ev-offer-western-digital"
        ],
        "remainingFields": [
          "B&H not re-fetched this round; Amazon bot-wall where attempted; WD.com JS template has no usable USD."
        ],
        "nextStep": "Browser pass for B&H/Amazon if parent needs current USD.",
        "reusedVsReread": "Newegg HTML from this batch; parent primary sold-by parse in parent-newegg-primary-state-correction.json. Dated offers not timestamp-refreshed."
      },
      {
        "id": "buying-judgment",
        "status": "已核实",
        "evidenceIds": [
          "ev-datasheet",
          "ev-offer-newegg"
        ],
        "remainingFields": [],
        "nextStep": "Independent review.",
        "reusedVsReread": "Introductions rewritten around this MPN."
      },
      {
        "id": "video",
        "status": "已检索未找到",
        "evidenceIds": [],
        "remainingFields": [
          "No exact-MPN original video obtained."
        ],
        "nextStep": "Parent export only if a video is later judged material.",
        "reusedVsReread": "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."
  }
}