LaCie ICA-312 User Manual page 179

Three-disk configuration includes: RAID 0, RAID 1, and RAID 5
Four- and five-disk configurations include: RAID 0, RAID 5, and RAID 6
4. Click Next.
5. Review the information then confirm the RAID mode by clicking Finish. Click Yes at the final prompt.
LaCie 2big NAS (OS 3.0) | LaCie 5big NAS Pro User Manual 179