return nil, err
				}

				mounts := []mount.MountPoint{
					{Device: "/dev/sdb", Path: file0},
					{Device: "/dev/sdc", Path: dir1},
					{Device: "/dev/sdd", Path: dir2},
					{Device: "/dev/sde", Path: file3},
				}
				return mounts, nil
			},
			unmount: func(mountpath string) error {
				err := filepath.Walk(mountpath, func(path string, info os.FileInfo, _ error) error {
					if path == mountpath {