SA260324R-0284
① SA Source
- Source: 開啟完整 SA 文章
- Section:
Vera ETL256 - Line hint:
354
Context Before
Each Vera ETL rack consists of 32 compute trays, 16 above and 16 below, arranged symmetrically around four 1U MGX ETL switch trays (based on Spectrum-6) in the middle.
Evidence
The symmetric split is deliberate: it minimizes cable length variance between compute trays and the spine, keeping all connections within copper reach.
Context After
From each switch tray, rear-facing ports connect to that copper spine for intra-rack communication, while 32 front-facing OSFP cages provide optical connectivity to the rest of the POD.
② Atomic Claim
這種對稱分割是刻意設計：可降低 compute tray 到 spine 的 cable length variance，讓所有連線維持在 copper reach 內。
- Epistemic Mode:
ASSERTED - Mapping Status:
COMPLETE
③ Semantic Frame
{
"frame_type": "NARY_RELATION",
"participants": [
{
"node": {
"id": "04_knowledge_base/Compute Tray",
"label": "compute tray"
},
"role": "component"
},
{
"node": {
"id": "04_knowledge_base/Copper",
"label": "copper"
},
"role": "interconnect"
}
],
"qualifiers": {
"condition_text": "keeps all connections within copper reach",
"numeric_mentions": [],
"temporal_mentions": []
},
"relation_type": "SYMMETRIC_LAYOUT_MINIMIZES_CABLE_VARIANCE"
}④ Canonical Entity Mapping
| Role | Surface Label | Canonical Target |
|---|---|---|
| component | compute tray | 04_knowledge_base/Compute Tray |
| interconnect | copper | Copper |
⑤ Human Review
請在 Properties 逐項確認：
- 原文 → Atomic Claim 是否忠實
- Atomic Claim → Semantic Frame 是否忠實
- Canonical Entity mapping 是否正確
- Epistemic mode 是否保留原文語氣
- 最後選擇
review_action
Review state
Markdown 內文不是正式 approval。只有 Apply bridge 寫入的 Decision Ledger event 才是正式決策。