text: Distributed RAID (DRAID) addresses those points. 
  
  **Distributed RAID**
  In distributed RAID, all drives are active, which improves performance. Spare capacity is used 
  instead of the idle spare drives from traditional RAID. Because no drives are idling, all drives 
  contribute to performance. The spare capacity is spread across the disk drives, so the write 
  rebuild load is distributed across multiple drives and the bottleneck of one drive is removed. 
  
  Distributed RAID reduces the recovery time and the probability of a second failure during 
  rebuild. Like traditional RAID, a distributed RAID 5 array can lose one physical drive and 
  survive. If another drive fails in the same array before the bad drive is recovered, the MDisk 
  and the storage pool go offline as they are supposed to. So, distributed RAID does not 
  change the general RAID behavior. 
  
  It is available for the IBM Storwize V7000 in two types: 
  
  (cid:2) Distributed RAID 5 (DRAID 5) 
  (cid:2) Distributed RAID 6 (DRAID 6) 
  
  Figure 6-34 on page 216 shows an example of a Distributed RAID6 with 10 disks. The 
  physical disk drives are divided into multiple packs. The reserved spare capacity (which is 
  marked in yellow) is equivalent to two spare drives, but the capacity is distributed across all of 
  the physical disk drives. The data is distributed across a single row. 