ICP RS Series User Manual page 59

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RAID 10 - Combination of RAID 1 and RAID 0
The idea behind RAID 10 is simply based on the combination of RAID 0 (Performance) and
RAID 1 (Data Security). Unlike RAID 4 and RAID 5, there is no need to calculate parity in-
formation. RAID 10 disk arrays offer good performance and data security. As in RAID 0, op-
timum performance is achieved in highly sequential load situations. Identical to RAID 1,
50% of the installed capacity is lost for redundancy.