Single Vs. Multiple Storage Pool Considerations - HP StorageWorks 12000 - Virtual Library System EVA Gateway Manual

Figure 47 Single vs. Multiple Storage Pool Considerations
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VLS9000 Storage Pooling
With VLS9000, the user establishes a storage pool policy which defines how the arrays are pooled.
VLS9000 then automatically creates storage pools based on the policy. Storage pools are defined
in terms of whole arrays, which consist of one base disk array and three expansion disk arrays. The
user can set the storage pool width across the arrays in the system as follows:
• All (default)
• 1 One storage pool across each array
• 2 One storage pool across every two arrays.
• 4 One storage pool across every four arrays
Partially populated storage pools may result if you select storage pool policy 2 or 4. For example, if
the storage pool policy is 2 and there are three arrays in the system, the VLS divides the three arrays
into two storage pools – one storage pool spans across two arrays, and the other storage pool spans
122 Virtual Library Systems
One storage pool across all arrays