A-11Storage ConceptsStripe Set of Mirror Sets (RAID 0/1)RAID technology allows you to create arrays that contain otherarrays. (Also known as multilevel arrays.) A stripe set of mirror sets isan array made up of two or more equal-sized mirror sets. The datain a stripe set of mirror sets is redundant.Figure A-7 represents a stripe set of mirror sets created from threeequal-sized mirror sets (A, B, and C) and striped across six drives.Each mirror set is made up of two partitions on two separate drives.The free space of the larger drive is not used.Figure A-7. Stripe set of mirror setsThe stripe set of mirror sets is the top-level array, and mirror sets A,B, and C are the underlying arrays.Other types of multilevel arrays exist, though the stripe set of mirrorsets offers the best balance of performance and redundancy of all themultilevel array types.Partition B(R)*Partition A Partition A(R)* Partition C Partition C(R)*Mirror Set A4 GB*(R) = Redundant12 GBStripe Set of Mirror SetsChunksChunks 1,4,7...Mirror Set B4 GBChunks 2,5,8...Drive 1Partition BDrive 2 Drive 3 Drive 4 Drive 5 Drive 61,2,3,4,5,6,7,8,9...4 GB 4 GB 4 GB 4 GB 4 GB 4 GBFree SpaceMirror Set C4 GBChunks 3,6,9...
