Storage Sizing Guide 2026

Enterprise Storage Sizing:
Pure Storage vs NetApp vs Dell EMC

Find the right all-flash array, HCI, or NAS for your workload — and get NET pricing that beats your current quote.

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Storage Sizing Fundamentals

Three key metrics determine the right platform:

Capacity
Usable ÷ (1 − dedup ratio)
DB: 3:1–5:1 · VMs: 2:1–4:1 · Backup: 10:1–65:1 · Media: 1:1. Add 25% headroom.
IOPS
Workload peak × 1.25
SQL Tier-1: 50K–10M+ IOPS · VMware: 10–50 IOPS/VM · VDI: 15–60 IOPS/desktop
Latency Tier
< 1ms / 2-5ms / tolerant
Tier-1 (DB): < 1ms all-flash · Tier-2 (general): 2–5ms · Tier-3 (backup): latency-tolerant

Enterprise Storage Vendor Comparison 2026

Pure Storage FlashArray

Recommended

Best all-flash — no forklift upgrades, 6-nines availability

//X10 · //X50 · //X70 · //X90 · //C60 · //C70

NetApp AFF / ONTAP

NAS/Unified

Best NAS/unified — hybrid cloud with Cloud Volumes ONTAP

A150 · A250 · A400 · A800 · A900 · C-Series

Dell EMC PowerStore

Enterprise

General enterprise block + file — broad portfolio

500T · 1000T · 3000T · 5000T · 7000T · 9000T

Dell PowerMax

Tier-1

Mission-critical Tier-1 — financial services gold standard

PowerMax 2000 (6.5M IOPS) · PowerMax 8000 (10M IOPS)

HPE Alletra

Mid-Market

InfoSight AI predictive support — best mid-market value

Alletra 6000 (11PB) · Alletra 9000 (9PB/7M IOPS)

Nutanix HCI

VMware Exit

Best VMware replacement — AHV is free, scales by node

NX-1000 · NX-3000 · NX-5000 · NX-8000 (GPU/AI)

Leaving VMware in 2026?

Broadcom's VMware pricing has increased 3–10× for most organizations. Nutanix with AHV (free hypervisor) is the most natural exit path — same HCI architecture, zero hypervisor license. Frankly is helping many customers make this move. Get a migration quote →

Not sure which storage platform is right?

The AI sizing tool will ask about your workloads, capacity, IOPS needs, and existing vendor — then give you a specific recommendation.

Workload type (DB/VMs/NAS)
Usable capacity needed
Performance tier
Protocol (block/file/object)
Existing vendor
VMware exit plans

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Storage FAQs

Pure Storage vs NetApp — which all-flash array is better?
Pure Storage wins on simplicity, performance consistency, and the Evergreen model (no forklift upgrades — ever). NetApp wins on NAS features, ONTAP data services (SnapMirror, FlexClone, SnapVault), and hybrid cloud story with Cloud Volumes ONTAP. For a pure block storage need (SQL Server, Oracle, VMware), Pure is typically simpler and faster. For mixed NFS/SMB + block workloads, NetApp is more flexible.
What is the Nutanix Evergreen model and why does it matter?
Pure Storage's Evergreen model means you subscribe to storage — hardware refreshes are included in the subscription cost, with no forklift upgrades and no data migration. Every 3-5 years, Pure replaces your controller shelf for free (with Evergreen//Forever perpetual) or includes it in the subscription (Evergreen//One). This eliminates the hidden cost of storage refresh cycles.
Should I leave VMware for Nutanix in 2026?
Broadcom's VMware licensing restructure has caused 3-10× price increases for most organizations. Nutanix with AHV (its free hypervisor) is the most natural exit path — you keep the same HCI architecture, same Prism management, and AHV handles the hypervisor role without a license fee. Frankly is helping many customers make this transition right now.
How do I size all-flash storage for a SQL Server workload?
SQL Server OLTP needs: <1ms latency, 10,000–100,000+ IOPS depending on database size and concurrency, and high read/write throughput. Start with your current workload's IOPs (use SQL Server's performance monitor). Apply 3:1-5:1 dedup/compression for SQL data. Add 25% capacity headroom. For <500K IOPS, Pure FlashArray//X10 or X20. For 500K-2M IOPS, //X50 or X70. NetApp AFF A400/A800 also handles SQL well.
What's the difference between SAN and NAS?
SAN (Storage Area Network) provides block storage — raw disk volumes presented to servers over Fibre Channel or iSCSI. Best for databases, VMs, and workloads needing low latency. NAS (Network Attached Storage) provides file storage — shared folders over NFS (Linux/VMware) or SMB (Windows). Best for file shares, home directories, and unstructured data. Many modern arrays (Pure, NetApp, Dell PowerStore) support both block and file from the same platform.
How much does enterprise storage cost?
Entry all-flash (Pure FlashArray//X10, Dell PowerStore 500T, HPE Alletra 6000): $30,000–$80,000. Mid-range (Pure //X50, NetApp AFF A400, Dell PowerStore 3000T): $80,000–$250,000. Enterprise (Pure //X70/X90, NetApp AFF A800, Dell PowerMax): $250,000–$1M+. Pure Storage and Nutanix also offer subscription/OpEx models. Frankly quotes NET pricing — typically 15-30% below list.

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Looking for storage vendor comparison instead? See our Enterprise Storage Comparison