IBM Storwize V5010 Manual page 204

For simplification, not all packs are shown in Figure 4-51.
Figure 4-51 Single drive failure with DRAID 6
The usage of multiple drives improves the rebuild process, which is up to 10 times faster than
traditional RAID. This speed is even more important when you use large drives.
The conversion from traditional RAID to distributed RAID is possible by using volume
mirroring or volume migration. Mixing traditional RAID and distributed RAID in the same
storage pool is also possible.
Example
The same number of disks can be configured by using traditional or distributed RAID. In our
example, we use 6 disk drives and assign those disks as RAID 6 to a single pool.
Figure 4-52 shows the setup for a traditional RAID 6 environment. The pool consists of one
MDisk, with 5 disk drives. The spare drive is not listed in this summary.
Figure 4-52 Array configuration for a traditional RAID 6 with 6 disks
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Implementing the IBM Storwize V5000 Gen2 with IBM Spectrum Virtualize V8.1