Storage Sizing Guide

Enterprise Storage Sizing: NetApp, Pure Storage & Dell

Choosing the right enterprise storage system depends on capacity, IOPS requirements, and your data growth trajectory. Use this guide to match your workload to the right array.

Calculate raw capacity needed and apply a 0.7 usable-to-raw ratio for RAID/erasure coding overhead.

For IOPS-sensitive workloads (databases, VDI), prioritize IOPS rating over raw capacity.

Plan for 3–5 years of data growth: multiply current need by 1.5–2× when sizing.

Factor in snapshot and replication space — typically adds 20–30% to required capacity.

NetApp AFF / FAS

ModelCapacityIOPSBest For
FAS2820Up to 1.5 PBUp to 350KSMB file & block storage
AFF A250Up to 1.5 PBUp to 700KMixed workload / VDI
AFF A400Up to 5 PBUp to 1.1MMid enterprise databases
AFF A800Up to 10 PBUp to 2.1MLarge enterprise / analytics
AFF A900Up to 20+ PBUp to 3.7MMission-critical / tier-1

Pure Storage FlashArray

ModelCapacityIOPSBest For
FlashArray//C60183 TB rawUp to 500KCapacity-optimized workloads
FlashArray//X20Up to 183 TBUp to 750KGeneral enterprise
FlashArray//X50Up to 366 TBUp to 1.5MPerformance workloads
FlashArray//X90Up to 1.5 PBUp to 3MLarge enterprise / AI

Dell PowerStore

ModelCapacityIOPSBest For
PowerStore 500TUp to 1 PBUp to 750KSMB / mid-market
PowerStore 1200TUp to 3.6 PBUp to 2.1MEnterprise
PowerStore 3200TUp to 4 PBUp to 4.5MLarge enterprise / HPC
PowerStore 9200TUp to 8 PBUp to 8M+Mission-critical / tier-1

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