Dell PowerStore, Pure Storage FlashArray, and NetApp AFF dominate UK enterprise all-flash storage RFPs. All three deliver end-to-end NVMe, mature data services, and 6-nines availability. The differentiators are operational model (Pure's Evergreen subscription vs traditional refresh), workload profile (block vs unified vs file-heavy), and which storage admin team you already have.
The short answer
Pure FlashArray is the safe default for greenfield UK enterprise. Evergreen//Forever subscription eliminates forklift refresh — controllers swap in place every 3-5 years included. The operational simplicity is genuine.
Dell PowerStore is the right call for unified block + file workloads, particularly Dell-shop customers. Best £/TBe at the entry-to-mid tier (500T, 3200T). Strong VMware integration.
NetApp AFF is the right call for file-heavy workloads (NFS, SMB, S3) or where ONTAP's SnapMirror replication + data tiering ecosystem is already in production. Best multi-protocol unified storage.
Where Pure FlashArray wins
Evergreen//Forever. Pure replaces controllers in-place every 3-5 years included in subscription. No data migration, no forklift refresh, no procurement event. For UK enterprise procurement teams, this is genuinely operationally different.
Operational simplicity. Pure consistently rates highest on Gartner peer reviews for "ease of operation". The Purity OS feature set is intentionally limited — you don't spend time tuning, you spend time on workloads.
Pure1 cloud-based management. Predictive capacity + performance forecasting across your full fleet from a single SaaS console.
Where Dell PowerStore wins
Best £/TBe at the entry-to-mid tier. PowerStore 500T and 3200T consistently come in 15-25% below equivalent Pure FlashArray //X10 / //X20 on competitive bids.
Unified block + file. PowerStore handles SAN block + NAS file in a single appliance. Pure is block-first (FlashBlade is separate for file). NetApp ONTAP handles both natively.
Dell-shop integration. Dell PowerEdge servers + PowerStore + PowerProtect backup + APEX consumption — single vendor relationship + single TAC for the entire stack. Material if you're already Dell.
Where NetApp AFF wins
ONTAP. ONTAP is the most mature storage OS in the industry — file (NFS, SMB), block (FC, iSCSI, NVMe-oF), object (S3), all with the same data services. For unified multi-protocol environments, ONTAP is best-in-class.
SnapMirror replication. The replication + DR ecosystem ONTAP has built over 25 years is unmatched. If you have an existing NetApp estate, SnapMirror is the gravity that keeps you in.
FabricPool. Tiering cold data to AWS S3 / Azure Blob / Google Cloud Storage automatically — frees expensive flash for hot data.
Total cost — 5-year picture (100 TBe, 4-node, mid-tier)
Pure FlashArray //X20 with Evergreen//Forever subscription: highest CAPEX, but zero refresh cost over 5 years. Best 7-10 year TCO; competitive 5-year TCO when refresh avoidance is factored in.
Dell PowerStore 3200T on traditional CAPEX + Dell ProSupport: lowest 5-year list price by 15-25%. Refresh at year 5 adds significant cost.
NetApp AFF A50 with Keystone subscription: middle of the pack. ONTAP feature breadth justifies the price for unified-protocol environments; expensive for pure block use cases.
What Servnet does
Servnet is an authorised UK partner of Dell Storage, Pure Storage, and NetApp. We sell, deploy, and migrate between them. A typical storage selection: 1) workload audit (IOPS / throughput / data growth profile), 2) 3-vendor sized commercial bid, 3) PoC at 2-3 workloads (4 weeks), 4) phased deployment + workload migration (8-16 weeks depending on data volume).