EMC CLARiion RAID 6 Technology: A Detailed Overview
CLARiiON RAID 6 technology offers more reliable RAID protection than other RAID technologies. It can tolerate two failed disks in a RAID group and more importantly hard media errors encountered during a single disk rebuild. CLARiiON offers many built-in protection mechanisms beyond basic RAID technology, so users have an added level of protection regardless of the RAID type used. The added reliability may come at the cost of performance when compared with other RAID types. RAID 6 has a disadvantage to RAID 5 and RAID 10 for small, random writes and system write bandwidth performance. but other 10 profiles are not affected as significantly.