diff --git a/services/smart.py b/services/smart.py
index a6fe68e..e1d58c8 100644
--- a/services/smart.py
+++ b/services/smart.py
@@ -75,20 +75,21 @@ def _parse_smart_json(device: str, data: dict) -> dict:
     """Extract relevant fields from smartctl JSON output."""
     result: dict = {"device": device, "smart_supported": True}
 
-    # Identity
-    result["model"] = data.get("model_name")
+    # Identity — ATA vs SCSI field names
+    result["model"] = data.get("model_name") or data.get("scsi_model_name")
     result["serial"] = data.get("serial_number")
-    result["firmware"] = data.get("firmware_version")
+    result["firmware"] = data.get("firmware_version") or data.get("scsi_revision_level")
     result["capacity_bytes"] = data.get("user_capacity", {}).get("bytes")
 
-    # WWN
+    # WWN — ATA uses structured wwn{}, SCSI uses logical_unit_id string
     wwn_data = data.get("wwn")
     if wwn_data:
-        # Reconstruct WWN string from components
         naa = wwn_data.get("naa", 0)
         oui = wwn_data.get("oui", 0)
         wwn_id = wwn_data.get("id", 0)
         result["wwn"] = f"{naa:x}{oui:06x}{wwn_id:09x}"
+    elif data.get("logical_unit_id"):
+        result["wwn"] = data["logical_unit_id"]
 
     # SMART health
     smart_status = data.get("smart_status", {})