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Logic behind multiple Internal Pools (with same RAID/Drive Capacity/SPEED) under a single SRP in VMAX AFA?

Array Configuration:-

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VMAX250F

54 EFD Drives

7.2TB Drive Capacity

RAID-5(3+1)

1 SRP having 16 Pools Created


We have an AFA Array as mentioned above, we only 1 RAID Type (RAID-5(3+1)) and same Capacity (7.2TB) EFD drives for all 16 Internal Pool.


My question here is since we use only 1 type RAID and same type of Drive Capacity with same SPEED why cant we create a single Pool having all the drives with 1 RAID and Map to


a single SRP. What is the logic (reasons/best practices) behind the creation 16/multiple Internal Pools even though we use same kind of Tiered/Capacity/SPEED Drives across the array?


I can understand the logic if it is a Hybrid VMAX3 array where we can apply FAST and move data chunks across multiple Tiers for better performance.

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Re: Logic behind multiple Internal Pools (with same RAID/Drive Capacity/SPEED) under a single SRP in VMAX AFA?

These pools are used for compression. Each pool is used for differently compressible extents. Please see the White Paper at this URL for a more in-depth explanation:

https://www.emc.com/collateral/technical-documentation/h17072-data-reduction-with-dell-emc-powermax....

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Re: Logic behind multiple Internal Pools (with same RAID/Drive Capacity/SPEED) under a single SRP in VMAX AFA?

Thanks much for your response.

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