RAID 0 1 (0+1) is stripping (RAID 0) and mirroring (RAID 1) combined, without parity (redundancy data) having to be calculated and written. The advantage of RAID 0 1 is fast data access (like RAID 0), but with the ability to lose one drive and have a complete duplicate surviving drive or set of drives (like RAID 1). RAID 0 1 still has a disadvantage of loosing half your drives for redundant data (like RAID 1) |