A pool is a set of disks that provide specific storage characteristics for the resources that use them. For example, the pool configuration defines the types and capacities of the disks in the pool. For physical deployments, the pool configuration also defines the RAID configurations.
Dell EMC recommends creating one storage pool for all SAP HANA data volumes and log volumes in a Unity array when you are using either an all-flash model or a hybrid model. When using the all-flash model, create one storage pool on the extreme performance tier. When you use the hybrid model, create one traditional all-flash pool or (optionally) a FAST VP-enabled traditional storage pool across the performance tier (SAS) and the extreme performance tier (flash).
With Unity hybrid models, traditional pools are created in the Unisphere GUI. To create an all-flash storage pool for provisioning the HANA persistence on the Unity hybrid model:
Extreme performance tier Provides fast access times for resources demanding the quickest response time. Databases can achieve their best performance when using this tier.
Performance tierProvides high, all-round performance with consistent response times, high throughput, and good bandwidth. This tier is appropriate for database resources accessed centrally through a network.
Capacity tier Provides high storage capacity with generally lower performance. This tier is appropriate for storing large amounts of primarily static data (such as video, audio, and image files) for users and applications without strict performance requirements.
Figure 8. Creating a pool – Select Storage Tiers page
Figure 9. Creating a pool – Select Amount of Storage page
Figure 10. Creating a pool – Review Selection page