Should they use the dual parity of RAID 6 or the mirrored data of RAID 10?
RAID 6 stripes data across disks and calculates dual distributed parity. Distributed parity provides fault tolerance against two drive failures. Dual parity means that while a failed disk is being rebuilt the array is still protected by the remaining parity data. RAID 1+0 (RAID 10) is mirrored sets in a striped set. RAID 1+0 creates a striped set from subsets of mirrored drives. If disks fail, RAID 1+0 allows all of the remaining disks to continue in use. The array can suffer multiple drive failures as long as no mirror set loses all of its drives. To help you choose the RAID level that best meets the needs of your organisation, let’s take a look at some of the advantages of RAID 6 and RAID 10. RAID 6 gives more usable capacity the more disks you add. Because RAID 10 mirrors everything, an array requires double the disk capacity of the data to be stored. The remainder of the capacity constitutes the mirror. If a RAID 6 array comprises four disks, only 50% of that space is available as
