diff --git a/monitoring/unit/disk.go b/monitoring/unit/disk.go
index 8fc055f..0a5932d 100644
--- a/monitoring/unit/disk.go
+++ b/monitoring/unit/disk.go
@@ -171,11 +171,33 @@ func DiskList() ([]string, error) {
 		if err != nil {
 			return nil, err
 		}
+
+		// 同一物理设备只保留路径最短的根挂载点
+		deviceMap := make(map[string]disk.PartitionStat)
 		for _, part := range usage {
 			if isPhysicalDisk(part) {
-				diskList = append(diskList, fmt.Sprintf("%s (%s)", part.Mountpoint, part.Fstype))
+				deviceID := part.Device
+				// ZFS去重: 基于 pool 名称
+				if strings.ToLower(part.Fstype) == "zfs" {
+					if idx := strings.Index(deviceID, "/"); idx != -1 {
+						deviceID = deviceID[:idx]
+					}
+				}
+
+				if existing, ok := deviceMap[deviceID]; ok {
+					// 优先保留路径更短的挂载点 (e.g., /volume1 优于 /volume1/@appdata/...)
+					if len(part.Mountpoint) < len(existing.Mountpoint) {
+						deviceMap[deviceID] = part
+					}
+				} else {
+					deviceMap[deviceID] = part
+				}
 			}
 		}
+
+		for _, part := range deviceMap {
+			diskList = append(diskList, fmt.Sprintf("%s (%s)", part.Mountpoint, part.Fstype))
+		}
 	}
 	return diskList, nil
 }