Figure 6-34 Distributed RAID 6 (for simplification, not all packs are shown) Figure 6-35 on page 217 shows a single drive failure in this DRAID6 environment. Physical  disk 3 failed and the RAID 6 algorithm is using the spare capacity for a single spare drive in  each pack for rebuild (which is marked in green). All disk drives are involved in the rebuild  process, which significantly reduces the rebuild time.  216  Implementing the IBM Storwize V7000 with IBM Spectrum Virtualize V8.2.1