NetApp AFF A400 vs Pure Storage FlashArray X50 R3
Pricing updated February 2026
Two premier all-flash arrays with very different secondary-market personalities: NetApp's ONTAP ecosystem versus Pure's subscription-centric model, which heavily shapes what used units are actually worth.
NetApp AFF A400
Pure Storage FlashArray//X50 R3
Specifications
| Spec | AFF A400 | FlashArray//X50 R3 |
|---|---|---|
| protocols | NFS, CIFS, iSCSI, FC, NVMe-oF | iSCSI, FC, NVMe-oF |
| controller | Dual HA | Dual active |
| form Factor | 4U (dual controller) | 3U |
| max Capacity | 2.9PB effective | 1.1PB effective |
The Verdict
Used NetApp is the more practical buy — ONTAP licensing travels with the hardware more gracefully, and the parts ecosystem is deeper. Pure hardware is excellent but its value is tightly coupled to active support contracts, so used FlashArrays trade at steep discounts and suit buyers who can operate without vendor support. Sellers of either should verify support transferability before listing; it is the single largest price variable.
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