text: Figure 2-10 Connecting SAS cables while complying with maximum chain weight 
  
  **2.5.10 RAID**
  
  When planning your network, consideration must be given to the type of RAID configuration. 
  The Storwize V7000 supports either the traditional array configuration or the distributed array. 
  
  The IBM Storwize V7000 setup contains several internal disk drives, but these disk drives 
  cannot be directly added to the storage pools. Disk drives must be included in a RAID to 
  provide protection against the failure of individual drives. 
  
  These disk drives are referred to as*members*of the array. Each array has a RAID level. RAID 
  levels provide various degrees of redundancy and performance, and have various restrictions 
  regarding the number of members in the array. 
  
  Apart from traditional disk arrays, IBM Spectrum Virtualize V7.6 introduced distributed RAID. 
  Distributed RAID improves recovery time of failed disk drives in an array by distributing spare 
  capacity between primary disks, rather than dedicating a whole spare drive for replacement. 
  
  IBM Storwize V7000 supports hot spare drives. When an array member drive fails, the system 
  automatically replaces the failed member with a hot spare drive and rebuilds the array to 
  restore its redundancy. Candidate and spare drives can be manually exchanged with array 
  members. 