I need a new storage area network (SAN). Which vendors offer the best performance for a virtualized environment?

If your primary requirement is high performance for a VMware/vSphere virtualized environment, I’d shortlist four vendors: Pure Storage, Dell, NetApp, and HPE. The differences are less about raw peak IOPS and more about latency consistency, VMware integration, scaling, and data services. Independent comparisons also caution that vendor IOPS numbers are generally lab ceilings, so a workload-specific proof of concept is much more meaningful.

My ranking for a VM-heavy SAN

1. Pure Storage FlashArray — best performance/operations combination

I'd put Pure at the top if your priority is consistently low latency under heavy VM load. FlashArray is designed around NVMe and NVMe-oF and is particularly attractive for dense virtualization, databases, and mixed VM workloads. Current FlashArray models advertise sub-150µs latency at the high end.

The other major advantage is operational: Pure's Evergreen approach is designed to let you upgrade hardware/software without the traditional forklift replacement cycle.

2. Dell PowerStore — best VMware-centric choice

PowerStore is arguably the strongest alternative if you're heavily invested in Dell + VMware. It has tight vSphere integration, including VASA/vVols capabilities, and supports NVMe-oF as well as traditional FC and iSCSI.

The newer PowerStore generation also moves toward a 200GbE RDMA interconnect on higher-end models, which is particularly interesting if you're building a high-throughput NVMe-oF environment.

3. NetApp AFF — best if storage services matter as much as speed

AFF is extremely competitive on performance, but its real advantage is ONTAP. If you need sophisticated snapshots, replication, disaster recovery, NAS alongside SAN, cloud tiering, or a common storage operating model across environments, NetApp can be the most capable choice. Current AFF A-Series systems can scale to very high aggregate performance in clustered configurations.

4. HPE Alletra — strong enterprise alternative

Alletra is worth including if you're already an HPE shop or want an as-a-service/GreenLake purchasing model. It is a capable VMware platform, although I'd generally put Pure and PowerStore ahead of it when pure VM storage performance and simplicity are the deciding factors.

What I'd actually put in an RFP

I'd invite Pure FlashArray, Dell PowerStore, and NetApp AFF to a bake-off, with HPE Alletra as a fourth bidder if you have an HPE relationship.

Don't compare them on advertised IOPS alone. Ask each vendor to demonstrate:

• 4K/8K random read/write latency at 50%, 70%, and 90% array load
• VM boot/login storms
• Mixed workloads: VDI + SQL/Oracle + general-purpose VMs
• QoS/noisy-neighbor behavior
• VMware vVols/VAAI/VASA functionality
• Snapshot and clone performance
• Replication/failover performance
• Data reduction on your VM dataset
• Controller failure and rebuild behavior
• NVMe/FC vs NVMe/TCP performance
• Performance as the array approaches 70–80% usable capacity

One important point: don't buy the array with the highest headline IOPS number. Configuration, workload mix, data reduction, network design, queue depth, and number of controllers can make a much bigger difference in a real VMware environment.

If you give me your approximate VM count, usable capacity (e.g. 50/100/250 TB), current IOPS/latency, VMware version, FC vs Ethernet preference, and budget, I can narrow this down to 2–3 specific SAN configurations and explain which I'd buy.

The other major advantage is operational: Pure's Evergreen approach is designed to let you upgrade hardware/software without the traditional forklift replacement cycle.

2. Dell PowerStore — best VMware-centric choice

PowerStore is arguably the strongest alternative if you're heavily invested in Dell + VMware. It has tight vSphere integration, including VASA/vVols capabilities, and supports NVMe-oF as well as traditional FC and iSCSI.

The newer PowerStore generation also moves toward a 200GbE RDMA interconnect on higher-end models, which is particularly interesting if you're building a high-throughput NVMe-oF environment.

3. NetApp AFF — best if storage services matter as much as speed

AFF is extremely competitive on performance, but its real advantage is ONTAP. If you need sophisticated snapshots, replication, disaster recovery, NAS alongside SAN, cloud tiering, or a common storage operating model across environments, NetApp can be the most capable choice. Current AFF A-Series systems can scale to very high aggregate performance in clustered configurations.

4. HPE Alletra — strong enterprise alternative

Alletra is worth including if you're already an HPE shop or want an as-a-service/GreenLake purchasing model. It is a capable VMware platform, although I'd generally put Pure and PowerStore ahead of it when pure VM storage performance and simplicity are the deciding factors.

What I'd actually put in an RFP

For high-performance virtualized environments, Pure Storage, Dell Technologies, and Hewlett Packard Enterprise (HPE) offer the best SAN vendors with industry-leading NVMe performance, low latency, and deep hypervisor integration.

Top SAN Vendors for Virtualization

• Pure Storage : Known for the Pure Storage FlashArray series, delivering ultra-low latency, pure NVMe architecture, and exceptional simplicity for heavy VMware and Hyper-V workloads.
• Dell Technologies : Offers Dell PowerStore and PowerMax, engineered specifically for high-density virtual machines with built-in AI-driven optimization and end-to-end NVMe.
• Hewlett Packard Enterprise (HPE) : Features HPE Alletra and Nimble Storage, providing cloud-managed, predictable high performance and resilient data reduction for virtualized infrastructure.
• NetApp : Provides NetApp ASA (All SAN Array) systems, offering streamlined, high-availability block storage designed for enterprise mission-critical virtual applications.

Vendor Comparison

If you share your approximate capacity needs (TB), primary hypervisor (VMware, Hyper-V, KVM) , and budget range , I can narrow down the exact model recommendation.

For a high-performance virtualized environment, Pure Storage, Dell Technologies, and Hewlett Packard Enterprise (HPE) offer the industry-leading Storage Area Network (SAN) solutions.

Top SAN Vendors for Virtualization

• Pure Storage FlashArray delivers consistent sub-millisecond latency , ultra-dense NVMe capacity, and deep integration with VMware vSphere via vStorage APIs for Array Integration (VAAI) and vSphere APIs for Storage Awareness (VASA).
• Dell PowerStore provides container-based architecture (AppsOn) that lets you run virtualized applications directly on the SAN array, alongside robust end-to-end NVMe performance.
• HPE Alletra / HPE GreenLake for Block Storage features AIOps-driven autonomous management through InfoSight, guaranteeing 100% data availability and high IOPS for massive VM density.
• NetApp ASA series offers dedicated unified block storage optimized for high throughput, seamless data protection, and instant cloning capabilities critical for rapid VM provisioning.

If you tell me your approximate usable capacity needs and hypervisor platform (VMware, Hyper-V, Nutanix) , I can help you narrow down the best model and connection type (Fibre Channel vs. iSCSI/NVMe-oF).

For a virtualized SAN, I’d focus less on peak IOPS and more on low latency under mixed VM workloads, predictable performance, VMware/Hyper-V integration, non-disruptive upgrades, replication, and ease of administration. Current analyst coverage includes Dell, HPE, NetApp, Pure, IBM, Hitachi and others; Gartner specifically evaluates virtualization as a primary-storage use case.

My shortlist

1. Pure Storage FlashArray — my first choice for a performance-oriented virtualization cluster. Pure's FlashArray is particularly attractive when you want consistently low latency, straightforward management, and minimal storage administration. Gartner Peer Insights currently gives FlashArray a 4.9/5 rating, and its enterprise-storage coverage describes it as delivering consistent high performance across block, file and object workloads.

2. NetApp AFF — best if storage services matter as much as raw speed. AFF combines very low-latency all-flash performance with ONTAP's mature snapshots, replication, data protection and hybrid-cloud capabilities. Gartner Peer Insights currently lists AFF A-Series at 4.8/5 across 418 ratings.

3. Dell PowerStore — excellent all-around enterprise choice. PowerStore is compelling if you already have a Dell environment or want a flexible general-purpose array. If the workload is particularly mission-critical, I'd also look at PowerMax; Gartner describes PowerMax as targeting high-performance, highly scalable workloads with end-to-end NVMe.

4. HPE Alletra — particularly attractive for HPE/VMware shops. Alletra dHCI is explicitly designed around virtualized environments, allowing compute and storage to scale independently while maintaining VM-centric management.

5. IBM FlashSystem / Hitachi VSP One — worth including for demanding enterprise SANs. I'd put these into an RFP when you have very demanding databases, large consolidation projects, stringent availability requirements, or an existing IBM/Hitachi skills base. Gartner includes both among the major enterprise/primary-storage platforms it evaluates.

What I'd buy

If I were running a competitive evaluation today, I'd put Pure FlashArray, NetApp AFF, and Dell PowerStore on the first round of testing, then add HPE Alletra if you're heavily invested in HPE/VMware.

For virtualization, make the vendors prove performance using your actual VM workload, rather than accepting advertised maximum IOPS. Test:

• 4K/8K/16K mixed random read/write at realistic queue depths
• VM boot/login storms
• SQL/Oracle workloads alongside ordinary VMs
• snapshots and clones while VMs are busy
• replication during peak I/O
• deduplication/compression with your real data
• latency at 50%, 70%, 80% and 90% utilization
• controller/node failure and recovery
• VMware integration, including vCenter, VAAI and VASA
• NVMe/FC versus traditional FC or iSCSI, depending on your fabric

One important point: don't let vendors win the RFP with a higher headline IOPS number. Storage specifications are notoriously difficult to compare because vendors use different block sizes, queue depths, data-reduction assumptions and latency measurements.

If you tell me your number of hosts, CPU cores/VM count, usable TB, current SAN protocol (FC/iSCSI/NVMe-oF), VMware/Hyper-V version, and approximate IOPS/latency, I can narrow this to 2–3 specific SAN configurations and explain which one I'd choose.

3. Dell PowerStore — excellent all-around enterprise choice. PowerStore is compelling if you already have a Dell environment or want a flexible general-purpose array. If the workload is particularly mission-critical, I'd also look at PowerMax; Gartner describes PowerMax as targeting high-performance, highly scalable workloads with end-to-end NVMe.

4. HPE Alletra — particularly attractive for HPE/VMware shops. Alletra dHCI is explicitly designed around virtualized environments, allowing compute and storage to scale independently while maintaining VM-centric management.

5. IBM FlashSystem / Hitachi VSP One — worth including for demanding enterprise SANs. I'd put these into an RFP when you have very demanding databases, large consolidation projects, stringent availability requirements, or an existing IBM/Hitachi skills base. Gartner includes both among the major enterprise/primary-storage platforms it evaluates.

What I'd buy

If I were running a competitive evaluation today, I'd put Pure FlashArray, NetApp AFF, and Dell PowerStore on the first round of testing, then add HPE Alletra if you're heavily invested in HPE/VMware.

If your primary goal is maximum performance for a VMware/vSphere virtualized environment, I’d put Pure Storage, Dell, and NetApp at the top of the shortlist, with HPE as a strong fourth option. The exact winner depends heavily on VM density, workload mix, protocol, and whether you need file services as well as block.

My shortlist

1. Pure Storage FlashArray — my first choice for performance

For a greenfield, predominantly VMware environment, I'd start with Pure Storage FlashArray. Its big strengths are very low and predictable latency, high IOPS, and a storage-management model that is particularly friendly to virtualization. Independent comparisons also consistently put FlashArray among the leading enterprise all-flash platforms.

Pure also has a long-standing VMware validated design through FlashStack, and VMware's compatibility documentation includes FlashArray platforms.

I'd choose it when: VM performance and operational simplicity matter more than getting the lowest initial purchase price.

2. Dell PowerStore — probably the best all-around choice

Dell PowerStore is particularly compelling if you're already a Dell shop with PowerEdge servers. It combines high-performance NVMe storage with strong VMware integration and can handle both block and file workloads. Current comparisons put it among the leading all-flash platforms and highlight its VMware integration and scalability.

I'd choose it when: you want excellent VMware performance but also want a broad Dell infrastructure ecosystem and potentially better economics.

3. NetApp AFF — excellent if NFS/data services matter

NetApp AFF is a particularly strong choice if your virtualization environment uses NFS, or if you want sophisticated replication, snapshots, tiering, and multi-protocol capabilities. NetApp explicitly supports VMware datastores over NFS, iSCSI, FC and NVMe-oF.

I'd choose it when: you're running a mixture of VMware plus file services, need strong DR/replication, or already have ONTAP expertise.

4. HPE Alletra

HPE Alletra is worth putting through the same benchmark, particularly if you're an HPE server customer. It is a serious NVMe-based enterprise platform and currently ranks highly among all-flash storage systems.

If performance is the deciding factor

I'd run a 3-way PoC:

1. Pure FlashArray
2. Dell PowerStore
3. NetApp AFF

Don't select based on advertised "million IOPS" figures. Storage vendors measure those under different conditions, so the numbers aren't directly comparable.

For VMware, I'd benchmark:

• 4K/8K random read/write IOPS
• 70/30 and 50/50 mixed workloads
• Latency at 20%, 50%, 80% and 100% load
• VM boot/login storms
• SQL/Oracle workloads if applicable
• Snapshot/clone performance
• Deduplication/compression with your actual VM data
• VMware vMotion while the array is under load
• Controller/node failure behavior
• Replication and recovery performance
• Growth from your current VM count to your 3–5 year VM count

One especially important point: don't optimize for peak IOPS. Optimize for latency at your expected sustained workload. A platform delivering 300K IOPS at 0.3 ms can be much better for VMware than one claiming 1M IOPS at a much higher queue depth.

If you give me your number of VMware hosts, CPU/RAM per host, current usable storage, IOPS/latency (if you have them), expected 3–5 year growth, FC vs iSCSI/NFS preference, and approximate budget, I can narrow this down to 2–3 specific SAN models and a recommended configuration.

2. Dell PowerStore — probably the best all-around choice

Dell PowerStore is particularly compelling if you're already a Dell shop with PowerEdge servers. It combines high-performance NVMe storage with strong VMware integration and can handle both block and file workloads. Current comparisons put it among the leading all-flash platforms and highlight its VMware integration and scalability.

I'd choose it when: you want excellent VMware performance but also want a broad Dell infrastructure ecosystem and potentially better economics.

3. NetApp AFF — excellent if NFS/data services matter

NetApp AFF is a particularly strong choice if your virtualization environment uses NFS, or if you want sophisticated replication, snapshots, tiering, and multi-protocol capabilities. NetApp explicitly supports VMware datastores over NFS, iSCSI, FC and NVMe-oF.

I'd choose it when: you're running a mixture of VMware plus file services, need strong DR/replication, or already have ONTAP expertise.

4. HPE Alletra

HPE Alletra is worth putting through the same benchmark, particularly if you're an HPE server customer. It is a serious NVMe-based enterprise platform and currently ranks highly among all-flash storage systems.

If performance is the deciding factor

I'd run a 3-way PoC:

When building or upgrading a Storage Area Network (SAN) for a heavy virtualized environment (such as VMware vSphere, Hyper-V, or KVM), you need ultra-low latency, predictable IOPS under mixed workloads, deep integration with hypervisor APIs (like VAAI/VASA), and robust data reduction.

According to industry validation and the Gartner Magic Quadrant for Enterprise Storage Platforms , a handful of market leaders consistently stand out for high-performance virtualized use cases:

• Everpure (formerly Pure Storage) : Consistently positioned at the top of execution and vision axes. Its Pure Storage FlashArray family leverages an all-NVMe, DirectFlash architecture optimized for microsecond-level latencies. It's a favorite for virtualized datacenters due to its "Evergreen" non-disruptive upgrade model and straightforward management plane.
• Dell Technologies : A dominant enterprise player whose Dell PowerStore and high-end Dell PowerMax lines are tailor-made for heavy virtualization. PowerStore features an active-active architecture, intelligent inline data reduction, and deep container/VM orchestration integration, making it exceptionally adaptable for mixed VM workloads.
• NetApp : Renowned for the NetApp AFF A-Series all-flash arrays. Powered by ONTAP, NetApp delivers phenomenal block-level performance with unified data management, incredible space-efficient cloning (vital for rapid VM provisioning and VDI), and stellar built-in snapshot/replication tech.
• Hewlett Packard Enterprise (HPE) : Features the HPE Alletra Storage MP architecture, which uses a disaggregated, scale-out design. It allows you to scale performance and capacity independently without downtime, backed by AI-driven predictive analytics (InfoSight) that help isolate and prevent VM-to-storage bottlenecks.
• IBM : Offers the IBM FlashSystem portfolio, which brings ultra-low latency flash combined with comprehensive cyber-resiliency and AI-driven predictive management, highly regarded in heavy transactional database virtualization.

To help narrow down the ideal platform for your setup, could you share:

• What is your primary hypervisor (VMware vSphere, Hyper-V, Proxmox, etc.)?
• Roughly how many VMs or total IOPS/capacity are you planning to support?

When designing a high-performance Storage Area Network (SAN) for a heavily virtualized environment , you want arrays that offer ultra-low latency, deep hypervisor integration (such as vVols or native APIs), predictable IOPS scaling, and robust automated data reduction.

The market leaders recognized for top-tier performance and virtualization features include:

• Pure Storage (FlashArray) : Renowned for its exceptionally consistent all-NVMe performance and the simplicity of its Evergreen architecture, which allows non-disruptive controller and media upgrades. It features deep integration with modern virtualization platforms and uses AI-driven management via Pure1 to predict bottlenecks and automate provisioning.
• Dell Technologies (PowerStore / PowerMax): PowerStore is built with a container-based microservices architecture and end-to-end NVMe, making it uniquely agile and deeply optimized for VMware vVols and multi-hypervisor deployments. For massive enterprise scale and ultra-dense, mission-critical virtualization workloads, PowerMax delivers blistering, predictable high-end performance.
• NetApp (AFF A-Series) : NetApp’s AFF all-flash arrays deliver industry-leading low latency paired with the mature data management capabilities of ONTAP. They excel in highly virtualized mixed environments (block, file, and cloud-connected tiering) with robust built-in ransomware protection and rapid cloning mechanisms that benefit virtual machine provisioning.
• Hewlett Packard Enterprise (HPE Alletra Storage MP) : HPE’s disaggregated, scale-out unified architecture provides high-performance block storage managed via the cloud-smart HPE GreenLake platform. It is engineered to handle dense VM consolidation smoothly while offering top-tier service-level guarantees for uptime and resilience.
• IBM (FlashSystem) : Powered by IBM Spectrum Virtualize, the FlashSystem family scales efficiently from mid-range to high-end enterprise needs. They provide exceptional IOPS-per-rack-unit metrics, hardware-accelerated compression, and robust encryption features tailored for critical virtualized databases and server consolidation.

To help narrow down which of these vendors fits your specific deployment, could you tell me:

• What hypervisor are you running (e.g., VMware vSphere, Microsoft Hyper-V, Proxmox/KVM)?
• What is your target capacity and estimated IOPS / latency requirements?

If your priority is maximum performance for a virtualized environment, I’d shortlist Pure Storage, Dell Technologies, and NetApp, with IBM and HPE as additional candidates depending on your requirements.

My shortlist

Current comparisons put PowerStore, FlashArray and AFF firmly in the top tier for all-flash enterprise SAN deployments.

If I were buying today

1. Pure FlashArray//X — my default performance choice

For a greenfield VMware/VCF environment where the primary objective is fast, consistent VM performance, I'd put Pure FlashArray//X at the top of the RFP. Its architecture emphasizes predictable low latency, and current models support NVMe and NVMe-oF over FC, RoCE and TCP.

The major advantage isn't necessarily the highest headline IOPS; it's getting consistently low latency under mixed VM workloads without extensive tuning.

2. Dell PowerStore — strongest all-around alternative

PowerStore is particularly compelling if you have a Dell-heavy infrastructure. The current generation uses NVMe throughout and supports NVMe-oF, with active/active controllers and scale-out architecture.

For a VMware environment with lots of VMs, databases and mixed workloads, I'd consider PowerStore very seriously.

3. NetApp AFF — best when data services matter

AFF becomes especially attractive when the SAN is only part of the requirement. If you also need NFS/SMB, extensive snapshots, replication, disaster recovery or hybrid-cloud integration, ONTAP can make NetApp substantially more valuable than a pure performance comparison suggests.

One important wrinkle: consider vSAN

If you're running VMware Cloud Foundation 9, don't automatically assume an external SAN will be fastest. VMware's published VMmark results show a 2026 VCF 9.0/vSAN ESA configuration scoring 12.42 @ 15.4 tiles, versus 12.22 @ 14 tiles for a comparable configuration using a Dell PowerMax FC SAN.

That doesn't mean vSAN universally beats PowerMax or other arrays—the configurations aren't identical—but it makes vSAN ESA worth benchmarking against an external SAN if you're refreshing the whole virtualization stack.

What I'd put in your RFP

Rather than asking vendors for maximum IOPS, I'd test:

• 4K/8K/16K random read/write
• 70/30 and 50/50 mixed workloads
• VM boot storms
• SQL/Oracle VM workloads
• VDI-style steady-state workloads
• Latency at 30%, 50%, 70%, 90% and 100% utilization
• VMware/VCF cluster scaling
• FC vs NVMe/TCP vs NVMe/FC
• Snapshot/clone performance
• Replication impact
• Failure of a controller/drive/path while VMs remain online

For virtualization, IOPS at 100% load and tail latency are much more useful than a vendor's maximum IOPS number. SPEC's storage benchmarks and VMware VMmark are useful independent reference points for this kind of evaluation.

Bottom line: If you give me no other constraints, I'd benchmark Pure FlashArray//X vs Dell PowerStore vs NetApp AFF, with Dell PowerMax added if this is a very large/mission-critical environment. For a pure performance-focused VMware deployment, Pure would be my first vendor to POC; for the best balance of performance, ecosystem and cost, PowerStore would be my second.

If you tell me your number of hosts, CPU cores, RAM, current SAN, usable TB, expected growth, VMware/VCF version, FC vs Ethernet preference, and approximate budget, I can narrow this to 2–3 specific models and give you a sizing/POC matrix.

For a virtualized environment (VMware vSphere, Hyper-V, etc.), I’d focus on all-flash/NVMe SANs with strong VMware integration, predictable latency, non-disruptive upgrades, and mature replication/data-protection features.

My shortlist

Current industry comparisons consistently put Everpure FlashArray, NetApp AFF/ASA, and Dell PowerStore among the leading enterprise all-flash SAN choices.

🥇 1. Everpure FlashArray//X — my default recommendation

For a new greenfield VMware SAN, this would probably be my first benchmark.

FlashArray//X is designed around very low, consistent latency, with NVMe and NVMe-oF connectivity. Current comparisons cite latency down into the sub-150–250 µs range depending on model/configuration. Its Evergreen architecture also allows controller upgrades without the traditional forklift migration.

Why I like it for virtualization:

• Very predictable latency under VM workloads
• Excellent VM/storage administration experience
• VMware integration and automation
• NVMe/FC, NVMe/TCP and other modern connectivity
• Strong snapshots/replication
• Non-disruptive hardware upgrades
• Excellent fit for dense VDI and large numbers of VMs

Downside: usually carries a premium price.

🥈 2. NetApp ASA / AFF

I'd put NetApp very close to Pure, particularly if you have a large environment or want more than straightforward block storage.

NetApp's ASA family is particularly interesting if the SAN is predominantly block/VMware, while AFF gives you ONTAP's broader NAS/object/data-management capabilities. Current A-Series systems can scale enormously, and NetApp supports NVMe/FC and NVMe/TCP.

Choose NetApp if you value:

• Huge scale-out potential
• VMware + NFS/SMB/S3 requirements
• Mature replication/data-management capabilities
• Existing ONTAP expertise
• Hybrid-cloud integration

If this is 100% VMware block storage, I'd benchmark a NetApp ASA against FlashArray//X rather than automatically buying AFF.

🥉 3. Dell PowerStore

PowerStore is probably the strongest value contender. It offers all-NVMe storage, NVMe-oF, active/active architecture and strong VMware integration.

I'd seriously consider it if:

• You're already a Dell server/VMware customer.
• You want block and file services.
• Price/performance matters.
• You want to standardize on Dell.
• You need a relatively straightforward SAN architecture.

For many mid-sized virtualization clusters, I wouldn't pay Pure's premium without benchmarking PowerStore first.

4. Dell PowerMax

If you're talking about thousands of VMs, very demanding databases, extremely high IOPS, or mission-critical workloads, PowerMax belongs in the RFP.

Current PowerMax systems are positioned at the high end, with published figures reaching millions of IOPS and sub-100-µs response times on appropriate configurations.

It's probably overkill for an ordinary VMware cluster, though.

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What I'd actually put in your RFP

I'd request quotes and hands-on benchmarks from these four:

1. Everpure FlashArray//X
2. NetApp ASA A-Series
3. Dell PowerStore
4. Dell PowerMax — only if you're a large/Tier-1 environment

And I'd make the vendors test your workload, not just give you their maximum IOPS number. Vendor IOPS figures aren't directly comparable because block size, read/write mix, queue depth and other test conditions differ.

For VMware, I'd specifically test:

• 4K/8K/16K random read/write
• 70/30 and 50/50 read/write
• VM boot storms
• SQL/Oracle-style workloads
• VDI login storms if applicable
• Snapshot creation/deletion while under load
• Replication while under load
• Failure of a controller/path/SSD
• Latency at 50%, 70%, and 90% utilization
• VMware vMotion while the array is busy

Don't select the array with the highest advertised IOPS. For virtualization, I'd give considerably more weight to consistent latency under contention, resiliency, VM integration, operational simplicity, and performance during failures.

If you tell me roughly how many VMs, usable TB, VMware version, current host count, expected IOPS/latency, and whether you use FC or Ethernet, I can narrow this down to 2–3 specific SAN models and a sensible configuration.

When selecting a new Storage Area Network (SAN) for a heavily virtualized environment (such as VMware vSphere, Microsoft Hyper-V, or KVM/Proxmox), performance depends not just on raw IOPS, but on ultra-low latency, predictable handling of random I/O spikes, deep hypervisor integration (like vVols or VAAI), and efficient inline data reduction.

The top-tier enterprise SAN vendors delivering exceptional performance for virtualized workloads include:

• Pure Storage (FlashArray family) — Renowned for consistently leading the industry in primary storage performance, predictability, and simplicity. Their native NVMe architecture delivers sub-millisecond latency under heavy VM boot storms or database workloads. Coupled with the Pure1 AIOps platform and Pure Fusion for autonomous fleet management, they excel at handling dense, mixed virtualized environments without performance degradation.
• Dell Technologies (PowerStore & PowerMax) — Dell PowerStore utilizes an adaptable, container-based microservices architecture and end-to-end NVMe to provide unified block, file, and VMware vVols support. It deeply integrates with hypervisor APIs to offload processing tasks. For extreme, tier-one mission-critical consolidation with massive scale, the Dell PowerMax line provides unmatched deterministic performance.
• NetApp (AFF A-Series) — NetApp’s All-Flash FAS (AFF) A-Series arrays deliver industry-leading low latency paired with robust unified capabilities (block, file, and object). They feature tight integration with virtualization ecosystems, highly efficient space savings through inline deduplication and compression, and stellar autonomous ransomware protection that won't choke your IOPS.
• Hewlett Packard Enterprise (HPE Alletra Storage MP) — HPE has pushed innovative disaggregated, scale-out unified architectures via its Alletra Storage MP lineup. It provides high-performance block and file services on a single OS baseline, backed by aggressive enterprise SLAs for zero data loss/downtime and cloud-like management through the GreenLake ecosystem.

To help narrow down which vendor and model fit your specific project, could you share:

• What hypervisor platform and version you are running (e.g., VMware vSphere, Hyper-V, Proxmox)?
• What your approximate capacity and IOPS/latency requirements are?
• Whether you are leaning toward Fibre Channel (FC) or iSCSI/NVMe-oF for your fabric?