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Figure 6-8 shows an example of storage pool striping, considering large (1-GB) extents. 

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A sample configuration is shown in Figure 6-9. The ranks are attached to DS8880 server 0 and server 1 in a half-and-half configuration, which might be used with a mixed count key data (CKD) and fixed-block (FB) workload. Ranks on separate device adapters are combined in a multi-rank extent pool, and volumes are striped across all available ranks in each pool. In all-CKD or all-FB systems, consider the use of a single extent pool for each server. 

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