Dell PowerStore and HPE Alletra Storage MP are both credible answers to the same question: what replaces an aging primary array. We sell both, which is exactly why this comparison can afford to be honest. The short version: PowerStore wins on simplicity and unified block-and-file in one box; Alletra MP wins when you want performance and capacity to scale independently. Most estates are decided by two or three of the rows below, not all of them.
Where they differ
| Factor | Dell PowerStore | HPE Alletra Storage MP |
|---|---|---|
| Architecture | Self-contained appliance: dual active-active nodes and storage in one 2U enclosure | Disaggregated: controller and capacity nodes scale independently on 2U building blocks |
| Scaling model | Appliance-sized steps; cluster up to 4 appliances | Add controllers for performance or shelves for capacity, separately |
| Workload coverage | Unified block and file (NFS, SMB) in one system | Block-focused; file is a separate answer |
| Management | On-array management, integrates with Dell ecosystem tooling | HPE GreenLake cloud console across the fleet |
| Fits best | Mid-sized estates wanting one predictable box per site | Larger or lopsided estates where capacity and performance grow at different rates |
The honest tie-breakers
If you need file services on the same array, PowerStore answers that natively and the comparison is effectively over.
If your capacity and performance needs grow at different rates, the disaggregated model stops you buying controllers you don't need to get shelves you do, and Alletra MP is built around exactly that.
If neither of those applies, the deciding factors are usually operational: which vendor's tooling your team already runs, existing support relationships, and the migration path from your current array. Those are estate facts, not spec-sheet facts, and they're legitimate reasons to pick either box.
Running the decision
The full decision framework, with configured builds for both paths, is in the storage refresh guide. Both product families are in the catalog with lifecycle status and specifications.