What this triage does
The tree separates five layers. If power is absent, file-service settings are irrelevant. If the admin page works but a share fails, inspect file services, permissions, and credentials before blaming the whole network. Any storage warning moves data protection ahead of convenience.
The result lists likely causes, a safe check order, actions to avoid, and the decision basis. It uses only the current local inputs.
Stop conditions: protect data first
- There is burning smell, overheating, or repeated clicking.
- The pool is crashed or degraded, or important files have no second copy.
- The UI proposes an unexpected initialization, volume creation, or disk format.
Decision basis and official sources
- Synology NAS 연결 문제 해결 — Original pages checked September 20, 2026
- Synology 비정상 드라이브 상태 — Original pages checked September 20, 2026
Menu names and supported procedures vary by vendor and model. This tool does not replace official instructions; its rules are reviewed when sources change.
Next steps
Continue with drive and storage-pool warning triage, then review single points of failure with the 3-2-1 backup planner.