HP 6-Port SATA RAID - Manual (Page 19)

Appendix D: About RAID 19
RAID 10
This dual-level RAID type is created by using two or more equal-sized RAID 1 arrays to create a RAID 0 array.
Both read and write performance are improved because array striping occurs. However, the performance
improvement requires that additional storage space be used because the arrays are mirrored.
Figure 6 A RAID 10 array