fix: complete hardware collection diagnostics

audit/internal/collector/raid.go

@@ -652,21 +652,56 @@ func appendUniqueStorage(base, extra []schema.HardwareStorage) []schema.Hardware
 	if len(extra) == 0 {
 		return base
 	}
-	seen := map[string]bool{}
-	for _, d := range base {
-		seen[storageIdentityKey(d)] = true
+	seen := map[string]int{}
+	for i, d := range base {
+		if key := storageIdentityKey(d); key != "" {
+			seen[key] = i
+		}
 	}
 	for _, d := range extra {
 		key := storageIdentityKey(d)
-		if key == "" || seen[key] {
+		if key == "" {
+			continue
+		}
+		if idx, ok := seen[key]; ok {
+			mergeStorageRecord(&base[idx], d)
 			continue
 		}
 		base = append(base, d)
-		seen[key] = true
+		seen[key] = len(base) - 1
 	}
 	return base
 }
 
+func mergeStorageRecord(dst *schema.HardwareStorage, src schema.HardwareStorage) {
+	if dst.Model == nil {
+		dst.Model = src.Model
+	}
+	if dst.SizeGB == nil {
+		dst.SizeGB = src.SizeGB
+	}
+	if dst.Interface == nil {
+		dst.Interface = src.Interface
+	}
+	if dst.Firmware == nil {
+		dst.Firmware = src.Firmware
+	}
+	if dst.Slot == nil {
+		dst.Slot = src.Slot
+	}
+	if dst.Manufacturer == nil {
+		dst.Manufacturer = src.Manufacturer
+	}
+	if dst.Present == nil {
+		dst.Present = src.Present
+	}
+	// A RAID controller often reports JBOD as Unknown; never replace a direct
+	// device health reading with that weaker verdict.
+	if dst.Status == nil {
+		dst.Status = src.Status
+	}
+}
+
 func storageIdentityKey(d schema.HardwareStorage) string {
 	if d.SerialNumber != nil && strings.TrimSpace(*d.SerialNumber) != "" {
 		return "sn:" + strings.ToLower(strings.TrimSpace(*d.SerialNumber))