In addition to the normal RAID levels 0-6 , it also has a RAID 10 implementation . Since Kernel 2.6.9 , RAID 10 is a single level . Additionally , the time required to rebuild data on a hot spare in a RAID 10 is significantly less than RAID 5 , in that all the remaining spindles in a RAID 5 rebuild must participate in the process , whereas only the spindle being created and its mirror need to participate in RAID 10 .