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  "exactMpn": "HAT3320-20T",
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  },
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    {
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      "model": "gpt-5.6-sol",
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      "agentRoleName": "qnap_research",
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    },
    {
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      "effort": "xhigh",
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    },
    {
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      "agentRoleName": "other_nas_research",
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      "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": [
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        "reports/buying-research-all-products-20260910/browser-acceptance.json"
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      "model": null,
      "effort": null,
      "identityBasis": "Host model family confirmed; exact variant and effort not asserted."
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      "scope": "integration and local page review",
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      "scope": "Exact official full datasheet, visually checked capacity columns and footnotes, official live product table, sampled HCL entries and notes, warranty clauses, original primary merchant offers; original community text where relevant and prior parent related-model original reads reused. Partial evidence coverage retained; no lab benchmark invented.",
      "evidenceChecks": [
        "Full PLUSHDD3320-2026-ENU-REV000 body plus page3/4 original visuals read: exact16T/20T capacities/cache281/295MBs,180TB workload,power/acoustics/environment and warranty values align.",
        "Official live product table and20T exact ProductSpec Apr23 2026 checked; HCL published/recommended exact model rows and DSM notes read, firmware-package names not OEM identity proof.",
        "Warranty country and temperature clauses read; correction preserves equals-or-exceeds boundary.",
        "Newegg primary buybox and decoded ItemDetail read:16T619.99/20T819.99,Newegg,new,in-stock. CDW16T exactMfg774.99andInStock501 read. Target identity-only offer removed; historical merchants retain their earlier dates.",
        "Kakaku full three original16T comments read;38Elm stockDS923+four16T RAID5 UbuntuNFS andsixmonths condition retained. LDLC full original list read, only two16T rows included. Related12T/4T charts and20T identityframe already read by parent, reused only within documented applicability.",
        "No exact-model lab benchmarks available in adopted evidence; video full-speech and blocked sources remain explicit gaps. No indexing approval added."
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    {
      "id": "official-datasheet",
      "title": "Synology Plus Series SATA HDD datasheet, PLUSHDD3320-2026-ENU-REV000",
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      "checkedAt": "2026-09-10",
      "locator": "Pages 1–4 and safety page; exact HAT3320-20T column",
      "readAction": "opened",
      "readScope": "20TB column reread on same family PDF",
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          "mimeType": "application/pdf",
          "sourceUrl": "https://global.download.synology.com/download/Document/Hardware/DataSheet/Hard%20Drives/26-year/HAT3300/enu/Synology_HAT3300_Data_Sheet_enu.pdf",
          "description": "Shared Plus datasheet"
        }
      ]
    },
    {
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      "title": "Synology Plus Series — hardware specifications and compatibility",
      "url": "https://www.synology.com/en-us/products/drives/hdd/plus-hat",
      "kind": "official",
      "checkedAt": "2026-09-08T15:56:07.462868+00:00",
      "locator": "HAT3320-20T column; 4KB Q1 power conditions and compatibility link",
      "readAction": "opened",
      "readScope": "HAT3320-20T HTML column",
      "readingActorId": "b04-grok",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "30ff9392291993d58154262018539fdd26afc2ea996f95dfa21d8f45d250060a",
          "mimeType": "text/html",
          "sourceUrl": "https://www.synology.com/en-us/products/drives/hdd/plus-hat",
          "description": "en-us product page"
        }
      ]
    },
    {
      "id": "merchant-bh",
      "title": "B&H — HAT3320-20T listing",
      "url": "https://www.bhphotovideo.com/c/product/1966316-REG/synology_hat3320_20t_20tb_hat3320_plus_series.html",
      "kind": "merchant",
      "checkedAt": "2026-09-08T15:56:07.462868+00:00",
      "locator": "Selected capacity / exact MPN and main new-product offer",
      "readAction": "blocked",
      "readScope": "HTTP 403; historical offer retained",
      "readingActorId": "b04-grok",
      "checkedOn": "2026-09-11",
      "materials": []
    },
    {
      "id": "merchant-adorama",
      "title": "Adorama — HAT3320-20T listing",
      "url": "https://www.adorama.com/synology-hat3320-plus-series-20tb-3-5-inch-internal-hard-drive/p/syhat332020t",
      "kind": "merchant",
      "checkedAt": "2026-09-08T15:56:07.462868+00:00",
      "locator": "Selected capacity / exact MPN and main new-product offer",
      "readAction": "blocked",
      "readScope": "HTTP 403",
      "readingActorId": "b04-grok",
      "checkedOn": "2026-09-11",
      "materials": []
    },
    {
      "id": "merchant-bestbuy",
      "title": "Best Buy — HAT3320-20T listing",
      "url": "https://www.bestbuy.com/product/synology-hat3320-plus-series-20tb-3-5-sata-iii-internal-hard-drive/J36TG78P9R",
      "kind": "merchant",
      "checkedAt": "2026-09-08T15:56:07.462868+00:00",
      "locator": "Selected capacity / exact MPN and main new-product offer",
      "readAction": "blocked",
      "readScope": "curl empty",
      "readingActorId": "b04-grok",
      "checkedOn": "2026-09-11",
      "materials": []
    },
    {
      "id": "merchant-newegg",
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      "url": "https://www.newegg.com/synology-hat3320-20t-20tb-for-daily-computing-7200-rpm/p/N82E16822108854",
      "kind": "merchant",
      "checkedAt": "2026-09-08T15:44:43.323459+00:00",
      "locator": "Selected capacity / exact MPN and main new-product offer",
      "readAction": "opened",
      "readScope": "Round 2 primary .product-seller-sold-by Newegg; NothingButSavings is other-seller JSON",
      "readingActorId": "b04-grok",
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          "mimeType": "text/html",
          "sourceUrl": "https://www.newegg.com/synology-hat3320-20t-20tb-for-daily-computing-7200-rpm/p/N82E16822108854",
          "description": "Saved Newegg 20T HTML; primary sold-by reread"
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      ]
    },
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      "title": "Amazon: HAT3320-20T current US new listing",
      "url": "https://www.amazon.com/dp/B0H8CPB2DC",
      "kind": "merchant",
      "checkedAt": "2026-09-10",
      "locator": "Exact MPN in title; selected new main buy box provides Add to cart and shows seller Amazon Germany; numeric price is hidden behind cart.",
      "readAction": "blocked",
      "readScope": "Challenge page this round; 2026-09-10 row retained",
      "readingActorId": "b04-grok",
      "checkedOn": "2026-09-11",
      "materials": []
    },
    {
      "id": "current-newegg-2-20260910",
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      "url": "https://www.newegg.com/synology-hat3320-20t-20tb-for-daily-computing-7200-rpm/p/N82E16822108854",
      "kind": "merchant",
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      "locator": "Exact MPN in H1; selected main offer shows Add to cart, seller Newegg, and a visible price of $819.99.",
      "readAction": "reused",
      "readScope": "Same PDP; original 2026-09-10 timestamp kept",
      "readingActorId": "b04-grok",
      "checkedOn": "2026-09-11",
      "materials": []
    },
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      "id": "official-hcl",
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      "url": "https://www.synology.com/en-us/compatibility?search_by=products&model=DS923%2B&category=hdds_no_ssd_trim",
      "kind": "official",
      "checkedAt": "2026-09-11",
      "locator": "findHclList tab=drives sampled Plus NAS; HAT3320-20T hcl_id 38029 firmware 1401 MG11_MN11_SATA_1401.ftd",
      "readAction": "opened",
      "readScope": "hcl_id 38029 + DSM 7.2.2 note",
      "readingActorId": "b04-grok",
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      ]
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      "checkedAt": "2026-09-11",
      "locator": "Section 2.1 start date; Section 2.3 drive temperature termination; country-of-purchase support",
      "readAction": "opened",
      "readScope": "3-year start date and thermal cutoff",
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          "description": "Limited warranty page"
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    },
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      "title": "Synology Product Spec HAT3320-20T ENU",
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      "readAction": "opened",
      "readScope": "ENU product spec Apr 23 2026",
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          "mimeType": "application/pdf",
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          "description": "HAT3320-20T product spec"
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      ]
    },
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      "id": "parent-video-yqMOBy_ShMc",
      "title": "niat — 2026-05-08 HAT3320 20TB receipt/unbox",
      "url": "https://www.youtube.com/watch?v=yqMOBy_ShMc",
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      "checkedAt": "2026-09-11",
      "locator": "Authored captions 0:00–7:46; 6:20 frame label HAT3320-20T 20TB; description self-bought replacement, Johor, published 2026-05-09. Not full-speech ASR.",
      "readAction": "opened",
      "readScope": "Description + sparse authored captions 0:00–7:46 + 06:20 frame viewed; not full ASR or audio",
      "readingActorId": "b04-grok",
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          "mimeType": "text/plain",
          "sourceUrl": "https://www.youtube.com/watch?v=yqMOBy_ShMc",
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        },
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          "mimeType": "text/plain",
          "sourceUrl": "https://www.youtube.com/watch?v=yqMOBy_ShMc",
          "description": "Expanded YouTube description, self-bought replacement, Johor, published 2026-05-09"
        },
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          "mimeType": "image/png",
          "sourceUrl": "https://www.youtube.com/watch?v=yqMOBy_ShMc",
          "description": "Grok-viewed 6:20 frame: label HAT3320-20T 20TB Plus Series SATA"
        }
      ]
    },
    {
      "id": "related-hardwareluxx-4t",
      "title": "Hardwareluxx — HAT3300-4T (related 4TB, 5400 rpm)",
      "url": "https://www.hardwareluxx.de/index.php/artikel/hardware/storage/61345-synology-hat3300%2C-4-tb%2C-im-test-neue-synology-festplatten-auch-f%C3%BCr-das-heimische-nas.html",
      "kind": "review",
      "checkedAt": "2026-09-11",
      "locator": "4TB 5400 rpm charts only; not 20TB measurements",
      "readAction": "opened",
      "readScope": "parent-reading.json; 4TB only",
      "readingActorId": "b04-grok",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "166784d351306c9f641d8e3e6df4143431bd46bc9501b6f0e74bc259505a11d9",
          "mimeType": "application/json",
          "sourceUrl": "https://www.hardwareluxx.de/index.php/artikel/hardware/storage/61345-synology-hat3300%2C-4-tb%2C-im-test-neue-synology-festplatten-auch-f%C3%BCr-das-heimische-nas.html",
          "description": "Parent-transcribed HAT3300-4T chart rows; 5400 rpm air drive, not 16/20TB"
        }
      ]
    }
  ],
  "coverage": {
    "productId": "synology-plus-series-hat3320-20t-20tb",
    "roundStatus": "本轮完成",
    "dimensions": [
      {
        "id": "identity",
        "status": "已核实",
        "evidenceIds": [
          "ev-datasheet-20t",
          "ev-hcl-20t",
          "ev-productspec-20t"
        ],
        "remainingFields": [
          "Retail Toshiba MPN not officially mapped"
        ],
        "nextStep": "Keep HAT5310-20T and HAT3310-16T separate.",
        "reusedVsReread": "Reread 20TB column + product spec PDF"
      },
      {
        "id": "specifications",
        "status": "已核实",
        "evidenceIds": [
          "ev-datasheet-20t",
          "ev-productspec-20t"
        ],
        "remainingFields": [],
        "nextStep": "None for core table.",
        "reusedVsReread": "Column reread; appended HCL/warranty rows"
      },
      {
        "id": "software-limits",
        "status": "部分覆盖",
        "evidenceIds": [
          "ev-hcl-20t"
        ],
        "remainingFields": [
          "Full NAS software N/A"
        ],
        "nextStep": "Buyer rechecks NAS HCL note.",
        "reusedVsReread": "DSM 7.2.2-72806 note"
      },
      {
        "id": "direct-measurement",
        "status": "已检索未找到",
        "evidenceIds": [],
        "remainingFields": [
          "No HAT3320-20T lab test"
        ],
        "nextStep": "Read yqMOBy_ShMc if parent supplies ASR.",
        "reusedVsReread": "EN/DE-style search; testbericht snippet no tests"
      },
      {
        "id": "related-experience",
        "status": "部分覆盖",
        "evidenceIds": [
          "ev-video-yqMOBy_ShMc",
          "ev-hardwareluxx-4t-for-20t"
        ],
        "remainingFields": [
          "US first-hand writeup"
        ],
        "nextStep": "Do not backfill Kakaku 16T RAID5 (MG09 vs MG11).",
        "reusedVsReread": "Read parent 20T unbox materials and Hardwareluxx 4T notes."
      },
      {
        "id": "us-new-pdp",
        "status": "部分覆盖",
        "evidenceIds": [
          "ev-newegg-20t-20260911"
        ],
        "remainingFields": [
          "B&H/Adorama/Amazon/Best Buy/Walmart/Micro Center live reread"
        ],
        "nextStep": "Parent browser for Micro Center/B&H.",
        "reusedVsReread": "Newegg primary .product-seller-sold-by reread on saved HTML; original 2026-09-11 date kept."
      },
      {
        "id": "buying-judgment",
        "status": "已核实",
        "evidenceIds": [
          "ev-hcl-20t",
          "ev-datasheet-20t",
          "ev-newegg-20t-20260911"
        ],
        "remainingFields": [
          "Quiet-desk ranking"
        ],
        "nextStep": "Keep noindex until an original exact-MPN test exists.",
        "reusedVsReread": "Updated DSM 7.2.2 and 3yr vs Newegg 5yr display"
      },
      {
        "id": "video",
        "status": "部分覆盖",
        "evidenceIds": [
          "ev-video-yqMOBy_ShMc"
        ],
        "remainingFields": [
          "Full-speech ASR",
          "original audio"
        ],
        "nextStep": "None unless a benchmark video appears.",
        "reusedVsReread": "Parent captions/description/frame; Grok viewed 06:20 identity frame."
      }
    ]
  },
  "retiredRecords": [
    {
      "kind": "offer",
      "id": "current-newegg-2-20260910-new",
      "supersededBy": "current-newegg-20260911-new",
      "reason": "Same clean PDP + MPN + seller Newegg; keep newest dated observation in research.offers.",
      "original": {
        "id": "current-newegg-2-20260910-new",
        "merchant": "Newegg",
        "seller": "Newegg",
        "url": "https://www.newegg.com/synology-hat3320-20t-20tb-for-daily-computing-7200-rpm/p/N82E16822108854",
        "exactMpn": "HAT3320-20T",
        "configuration": "One 20TB 3.5-inch SATA HDD",
        "priceUsd": 819.99,
        "currency": "USD",
        "availability": "in-stock",
        "condition": "new",
        "conditionBasis": "Regular exact-product main listing; no used, refurbished or open-box designation appears in the title or selected main offer.",
        "checkedAt": "2026-09-10",
        "sourceId": "current-newegg-2-20260910",
        "evidenceLocator": "Exact MPN in H1; selected main offer shows Add to cart, seller Newegg, and a visible price of $819.99.",
        "shipping": "Shipping cost, destination eligibility and tax require checkout verification.",
        "purchaseConditions": "Current page observation 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."
  }
}