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        "Parent read saved exact product variants, SKU, color, stock status, base and surcharge-inclusive price and visible buy box; original observation date retained, no fresh-fetch claim.",
        "Parent read all model specification sections, flags and footnotes. Full published semantic fields retained; memory/ECC/compatibility unknowns not invented.",
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        "Parent independently read full available original written article; UNAS-2-W; UniFi Drive 3.2.10; one week; first two 4 TB WD Red Plus 5400 RPM HDDs, then two 8 TB IronWolf 7200 RPM HDDs, both RAID 1. Ubiquiti Pro XG 8 PoE switch, native 2.5GbE NAS link; exact drive MPNs/client/file profile not stated. One sample and one week; chart does not isolate the two different drive pairs. Snapshot 256-version/daily and USB-backup limitations describe Drive 3.2.10, not a current permanent cap. Parent read the available original article and both original result charts; quiet/cool is qualitative.",
        "Parent independently read full available original written article; UNAS 2; UniFi OS 4.4.4 and Drive 3.2.14 visible in original dashboards. Two 22 TB WD Red Pro 7200 RPM HDDs in RAID 1; NFS FIO generator on 10GbE via switch, NAS native 2.5GbE. Exact drive MPN/client details not fully stated. Job count and queue depth were swept; high-load latency is not ordinary desktop-copy latency. Sequential-write prose overstates the range compared with its graph; full plotted range is retained. No VM-host or USB 5GbE-adapter test was demonstrated; positioning is not a benchmark.",
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        "Full available original follow-up article read. Same reviewer/sample test family; no independent new measurement group. Third-party USB-NIC/photo-backup reports are not original experiments.",
        "Parent read exact MPN, condition, displayed price and order/lead-time terms in saved primary page. Flytec JSON-LD OutOfStock, quote-only restriction and separate surcharge qualified; no checkout.",
        "Parent read full relevant official help article body and tables/footnotes; model-specific scope separated from Pro/ENAS/Protect. Cache exclusions and RAID minimum-disk footnotes retained."
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      "readAction": "opened",
      "readScope": "Parent read saved exact product variants, SKU, color, stock status, base and surcharge-inclusive price and visible buy box; original observation date retained, no fresh-fetch claim.",
      "readingActorId": "current-codex-root",
      "observedAt": "2026-09-11T09:52:09.000Z",
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          "description": "Original material read within the explicitly recorded parent scope."
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          "sourceUrl": "https://www.storagereview.com/review/ubiquiti-unifi-unas-2-review-compact-poe-nas-for-home-and-small-office",
          "description": "Original material read within the explicitly recorded parent scope."
        },
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          "sha256": "7142af2954f63f55922178518de5681edfb932a8b9ea26d82b8417505a76c696",
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          "sourceUrl": "https://www.storagereview.com/review/ubiquiti-unifi-unas-2-review-compact-poe-nas-for-home-and-small-office",
          "description": "Original material read within the explicitly recorded parent scope."
        }
      ]
    },
    {
      "id": "review-nascompares-unas-2",
      "title": "NAS Compares UniFi UNAS 2 review",
      "url": "https://nascompares.com/2025/09/18/unifi-unas-2-review/",
      "kind": "review",
      "checkedAt": "2026-09-11T09:55:00.000Z",
      "locator": "Parent read full available original written article via web; figure access limits recorded in audit. ",
      "readAction": "opened",
      "readScope": "Parent independently read full available original written article; UNAS 2; two 8 TB HDDs in RAID 1 over native 2.5GbE; AJA and CrystalDiskMark described. Exact HDD MPN, firmware, client and acoustic instrument/distance/background not specified. Parent fully read the available written review; four attempted original benchmark images remained blocked (403), so numerical values rely on prose. Noise distance, meter and ambient floor were not disclosed; results are not a standardized product rating. 2026 follow-up is the same test family; its owner reports are secondary evidence.",
      "readingActorId": "current-codex-root",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "6ba67e318df1fdb825bcc20aa15513eaeebc2a217a46df43b7aa1ffe245338bb",
          "mimeType": "text/html",
          "sourceUrl": "https://web.archive.org/web/20260105120122/https://nascompares.com/2025/09/18/unifi-unas-2-review/",
          "description": "Wayback NAS Compares UNAS 2"
        },
        {
          "sha256": "24658c222a9c445f4c0bfebfd74f813ac6b49d951fcffa4ceac9f76625517a0b",
          "mimeType": "application/json",
          "sourceUrl": "https://nascompares.com/2025/09/18/unifi-unas-2-review/",
          "description": "Original material read within the explicitly recorded parent scope."
        }
      ]
    },
    {
      "id": "review-nascompares-year-later",
      "title": "NAS Compares UNAS 2 and UNAS 4 one year later",
      "url": "https://nascompares.com/2026/08/26/unifi-unas-2-and-unas-4-one-year-later/",
      "kind": "review",
      "checkedAt": "2026-09-11",
      "locator": "Parent read full available original written article via web; figure access limits recorded in audit. Follow-up continues the same original test family.",
      "readAction": "opened",
      "readScope": "Full available original follow-up article read. Same reviewer/sample test family; no independent new measurement group. Third-party USB-NIC/photo-backup reports are not original experiments.",
      "readingActorId": "current-codex-root",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "22855c9d5463351cb6df5655ded89addb5d7e1adba10f1c086631f794c5189f0",
          "mimeType": "text/markdown",
          "sourceUrl": "local-research-notes",
          "description": "Tool-captured facts 2026-09-11"
        },
        {
          "sha256": "0d0f20967d2ddb841e3af7ef08d827798009d6a694ae6aa653c6beed47720432",
          "mimeType": "application/json",
          "sourceUrl": "https://nascompares.com/2026/08/26/unifi-unas-2-and-unas-4-one-year-later/",
          "description": "Original material read within the explicitly recorded parent scope."
        }
      ]
    },
    {
      "id": "merchant-direct-current",
      "title": "Ubiquiti US Store UNAS-2 offer",
      "url": "https://store.ui.com/us/en/products/unas-2",
      "kind": "merchant",
      "checkedAt": "2026-09-11T09:52:09.000Z",
      "locator": "Same NEXT_DATA as official-product; $214 with surcharges, Available",
      "readAction": "opened",
      "readScope": "Parent read saved exact product variants, SKU, color, stock status, base and surcharge-inclusive price and visible buy box; original observation date retained, no fresh-fetch claim.",
      "readingActorId": "current-codex-root",
      "observedAt": "2026-09-11T09:52:09.000Z",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "0737d5b8ae5730a921e33b28994167b577406b9d2185d9aa50055a0450616ee5",
          "mimeType": "text/html",
          "sourceUrl": "https://store.ui.com/us/en/products/unas-2",
          "description": "US store HTML"
        },
        {
          "sha256": "4d6c38c35aa0a49cf33bcdc5b5f2001928d7012716e5f13fb21422789d5fd514",
          "mimeType": "application/json",
          "sourceUrl": "https://store.ui.com/us/en/products/unas-2",
          "description": "Original material read within the explicitly recorded parent scope."
        },
        {
          "sha256": "f0d53dbc1f13580b2606acde2e9832f6e8428263118f3df4e0026ea310b46305",
          "mimeType": "text/plain",
          "sourceUrl": "https://store.ui.com/us/en/products/unas-2",
          "description": "Original material read within the explicitly recorded parent scope."
        }
      ]
    },
    {
      "id": "merchant-microcom-unas-2",
      "title": "Microcom UNAS-2-B",
      "url": "https://www.microcom.us/unas2b.html",
      "kind": "merchant",
      "checkedAt": "2026-09-11T09:55:00.000Z",
      "locator": "Item# UNAS-2-B $199.00; Usually ships in 6-8 weeks; HDD not included",
      "readAction": "opened",
      "readScope": "Parent read exact MPN, condition, displayed price and order/lead-time terms in saved primary page. Flytec JSON-LD OutOfStock, quote-only restriction and separate surcharge qualified; no checkout.",
      "readingActorId": "current-codex-root",
      "observedAt": "2026-09-11T09:55:00.000Z",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "36f4683d6f2982247dbf038cfa17ff1a553bc2d7440182bcb12cad1c8763304b",
          "mimeType": "text/html",
          "sourceUrl": "https://www.microcom.us/unas2b.html",
          "description": "Microcom PDP"
        }
      ]
    },
    {
      "id": "merchant-amazon-unas-2-w",
      "title": "Amazon UNAS-2-W PDP",
      "url": "https://www.amazon.com/dp/B0G26S3HS8",
      "kind": "merchant",
      "checkedAt": "2026-09-11T09:52:09.000Z",
      "locator": "Title Ubiquiti UNAS 2 … White (UNAS-2-W); buy-box seller/stock not cleanly verified",
      "readAction": "opened",
      "readScope": "Title UNAS-2-W; buy-box incomplete",
      "readingActorId": "b26-grok",
      "observedAt": "2026-09-11T09:52:09.000Z",
      "materials": [
        {
          "sha256": "6698560d22ddf644a0240b54c2b0600aa729b8e65ada09e162b9693bd1ab86e6",
          "mimeType": "text/html",
          "sourceUrl": "https://www.amazon.com/dp/B0G26S3HS8",
          "description": "Decoded Amazon HTML"
        }
      ]
    },
    {
      "id": "official-raid",
      "title": "Ubiquiti storage protection and RAID",
      "url": "https://help.ui.com/hc/en-us/articles/12395353544727-Storage-Protection-and-Data-Redundancy-in-UniFi-RAID",
      "kind": "official",
      "checkedAt": "2026-09-11",
      "locator": "For UNAS: single pool/group, drive counts and RAID footnotes; Pro-only conversion is not generalized.",
      "readAction": "opened",
      "readScope": "Parent read full relevant official help article body and tables/footnotes; model-specific scope separated from Pro/ENAS/Protect. Cache exclusions and RAID minimum-disk footnotes retained.",
      "readingActorId": "current-codex-root",
      "checkedOn": "2026-09-11",
      "materials": [
        {
          "sha256": "71957223e1cc0b889e099d8a2424d1ac9ecb1999c32c50e569dc78aab363f035",
          "mimeType": "application/json",
          "sourceUrl": "https://help.ui.com/hc/en-us/articles/12395353544727-Storage-Protection-and-Data-Redundancy-in-UniFi-RAID",
          "description": "Original material read within the explicitly recorded parent scope."
        },
        {
          "sha256": "4f1f6524eb937e6d156ca3fc16d2c3284cd2c50324674b884e2e7e63b0a9401e",
          "mimeType": "application/json",
          "sourceUrl": "https://help.ui.com/hc/en-us/articles/12395353544727-Storage-Protection-and-Data-Redundancy-in-UniFi-RAID",
          "description": "Original material read within the explicitly recorded parent scope."
        },
        {
          "sha256": "a8734cafd88458f745b78176841314f6379a3f11a3d41c2ba99740d9ce95b461",
          "mimeType": "application/json",
          "sourceUrl": "https://help.ui.com/hc/en-us/articles/12395353544727-Storage-Protection-and-Data-Redundancy-in-UniFi-RAID",
          "description": "Original material read within the explicitly recorded parent scope."
        },
        {
          "sha256": "063d936bfba90b6c567c757dfae629a644676bfd40707a2f6944887688668bd6",
          "mimeType": "application/json",
          "sourceUrl": "https://help.ui.com/hc/en-us/articles/12395353544727-Storage-Protection-and-Data-Redundancy-in-UniFi-RAID",
          "description": "Original material read within the explicitly recorded parent scope."
        }
      ]
    }
  ],
  "coverage": {
    "productId": "ubiquiti-unas-2",
    "roundStatus": "研究与独立复核完成，证据缺口明确保留",
    "reviewCount": 3,
    "offerCount": 2,
    "dimensions": [
      {
        "id": "identity",
        "status": "已核实",
        "evidence": "UNAS-2 exact model and color variants.",
        "evidenceIds": [
          "ev-techspecs",
          "ev-store"
        ],
        "gaps": "No borrowing from UNAS Pro.",
        "thisRound": "Grok 4.6 research/self-check; GPT-6 (Codex) independent original-source review and correction.",
        "reused": "Original researcher draft separately preserved.",
        "nextStep": ""
      },
      {
        "id": "specifications",
        "status": "已核实",
        "evidence": "59 specification/support rows and complete manufacturer model-table fields.",
        "evidenceIds": [
          "ev-techspecs",
          "ev-qig"
        ],
        "gaps": "ECC and current installed firmware not established.",
        "thisRound": "Grok 4.6 research/self-check; GPT-6 (Codex) independent original-source review and correction.",
        "reused": "Original researcher draft separately preserved.",
        "nextStep": ""
      },
      {
        "id": "software-limits",
        "status": "部分覆盖",
        "evidence": "Current official model table and RAID/cache help reconciled with dated reviews.",
        "evidenceIds": [
          "ev-techspecs",
          "ev-dongknows"
        ],
        "gaps": "No current endpoint restore validation; third-party issue reports not original measurements.",
        "thisRound": "Grok 4.6 research/self-check; GPT-6 (Codex) independent original-source review and correction.",
        "reused": "Original researcher draft separately preserved.",
        "nextStep": ""
      },
      {
        "id": "direct-measurement",
        "status": "部分覆盖",
        "evidence": "3 distinct original test/use records; follow-up not double-counted.",
        "evidenceIds": [
          "parent-nas-full-118",
          "parent-storagereview-unas-2",
          "parent-nascompares-unas-2"
        ],
        "gaps": "NAS Compares figures blocked; exact workload and acoustic conditions incomplete.",
        "thisRound": "Grok 4.6 research/self-check; GPT-6 (Codex) independent original-source review and correction.",
        "reused": "Original researcher draft separately preserved.",
        "nextStep": ""
      },
      {
        "id": "related-experience",
        "status": "部分覆盖",
        "evidence": "Year-later NIC reports; German owner threads not fully adopted.",
        "evidenceIds": [
          "ev-year-later-2"
        ],
        "gaps": "Kodinerds 2.5-inch adapter anecdote not independently verified.",
        "thisRound": "Grok 4.6 research/self-check; GPT-6 (Codex) independent original-source review and correction.",
        "reused": "Original researcher draft separately preserved.",
        "nextStep": ""
      },
      {
        "id": "us-new-pdp",
        "status": "部分覆盖",
        "evidence": "Dated official and exact reseller primary offers.",
        "evidenceIds": [
          "ev-store"
        ],
        "gaps": "Shipping, authorized-channel eligibility and surcharge total need checkout/quote verification.",
        "thisRound": "Grok 4.6 research/self-check; GPT-6 (Codex) independent original-source review and correction.",
        "reused": "Original researcher draft separately preserved.",
        "nextStep": ""
      },
      {
        "id": "buying-judgment",
        "status": "已核实",
        "evidence": "Buy the UNAS 2 if you want simple RAID 1 file storage that drops onto a UniFi (or any) network with one PoE++ cable and an included 60W injector. Independent tests show 2.5GbE-limited transfers around 200 MB/s in everyday copies and about 258–266 MB/s sequential NFS reads, with no Docker, VMs or media apps. Skip it if you need 2.5-inch/NVMe bays, hot-swap trays, link aggregation, or a general-purpose NAS OS.",
        "evidenceIds": [
          "ev-techspecs",
          "ev-store",
          "ev-dongknows"
        ],
        "gaps": "Evidence limits explicit.",
        "thisRound": "Grok 4.6 research/self-check; GPT-6 (Codex) independent original-source review and correction.",
        "reused": "Original researcher draft separately preserved.",
        "nextStep": ""
      },
      {
        "id": "video",
        "status": "尚未研究",
        "evidence": "Written articles and individually captured figures only.",
        "evidenceIds": [
          "ev-youtube"
        ],
        "gaps": "No full video inspection.",
        "thisRound": "Grok 4.6 research/self-check; GPT-6 (Codex) independent original-source review and correction.",
        "reused": "Original researcher draft separately preserved.",
        "nextStep": ""
      }
    ],
    "roundNote": "completed work != full data coverage. Structural validate is not independent approval. Day precision 2026-09-11. fetch_content SSRF-blocked ui.com; curl used."
  },
  "retiredRecords": [
    {
      "recordType": "offer",
      "id": "direct-current-unknown-2026-09-10",
      "reason": "Same Ubiquiti PDP reread with confirmed color mapping and numeric surcharge price; old null-price row not duplicated."
    },
    {
      "recordType": "review",
      "reason": "Same original experiment follow-up; retained as cited context, not an independent measurement sample.",
      "records": [
        {
          "id": "nascompares-unas-2-year-later",
          "title": "NAS Compares UNAS 2 / UNAS 4 one year later",
          "publisher": "NAS Compares",
          "author": "Rob Andrews",
          "publishedAt": "2026-08-26",
          "updatedAt": "2026-08-26",
          "url": "https://nascompares.com/2026/08/26/unifi-unas-2-and-unas-4-one-year-later/",
          "type": "article",
          "originalTestGroup": "nascompares-desktop-year-later",
          "testedConfiguration": "Same UNAS 2 unit ~11 months in service; UniFi Drive to 4.3.10 and NAS OS 5.1.30 by August 2026 (article).",
          "applicability": "Long-term UNAS 2 software/reliability notes. Do not copy UNAS 4 cache or RAID 5 numbers onto UNAS 2.",
          "selectionReason": "Follow-up on an actual UNAS 2, including surcharge, NIC reports and software growth.",
          "findings": [
            {
              "text": "US store surcharge took UNAS 2 from $199 list to $214 without adding RAM.",
              "locator": "Surcharges section"
            },
            {
              "text": "Desktop UNAS NICs identified as USB-attached Realtek RTL8156 (r8152). Some owners saw 2.5GbE flaps or stalls; not universal.",
              "locator": "Internal USB 2.5GbE section"
            },
            {
              "text": "Idle/load acoustics stayed in the original 31–32 / 35–38 dBA band on this UNAS 2 after ~11 months.",
              "locator": "Low noise section"
            }
          ],
          "measurements": [],
          "limitations": [
            "Owner NIC reports are not a failure-rate study.",
            "Live page 403 this round; reread from web_search stored extract (response mtws1cbqtv19xi)."
          ],
          "sourceId": "review-nascompares-year-later"
        }
      ]
    }
  ],
  "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."
  }
}