extern int volume_id_probe_linux_raid(struct volume_id *id, uint64_t off, uint64_t size);
extern int volume_id_probe_lvm1(struct volume_id *id, uint64_t off, uint64_t size);
extern int volume_id_probe_lvm2(struct volume_id *id, uint64_t off, uint64_t size);
+extern int volume_id_probe_ddf_raid(struct volume_id *id, uint64_t off, uint64_t size);
/* bios raid */
extern int volume_id_probe_intel_software_raid(struct volume_id *id, uint64_t off, uint64_t size);