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Dell PowerScale vs NetApp FAS Series comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Feb 8, 2026

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

ROI

Sentiment score
6.3
Dell PowerScale boosts efficiency and cost savings with performance, management ease, data deduplication, and integration benefits.
Sentiment score
5.2
NetApp FAS Series offers cost-effective storage consolidation with reliable deduplication, ideal for VMware, providing significant ROI and service quality.
Something such as Dell PowerScale puts us ahead of all of our competitors because of the speed at which we can iterate while we are on set.
Chief Executive Officer at Orbital Virtual Studios
Despite being more expensive than Huawei, it is stable and most enterprises accept the price due to its stability.
Senior System Engineer at Atlas Security
In terms of Dell PowerScale (Isilon) specifically, we have seen a return on investment due to faster performance than our last few storage arrays, and the general usability is a lot better.
Storage & Data Protection Specialist at General Dynamics Land Systems
If you have the configuration well maintained and configured, you should have good efficiency and compression for the clients and for yourself.
System Engineer at a computer software company with 1,001-5,000 employees
 

Customer Service

Sentiment score
7.3
Dell PowerScale support is typically praised for responsiveness and effectiveness, though experiences can vary based on agents.
Sentiment score
7.3
NetApp FAS Series' customer service is well-regarded for knowledgeable support, though first-level responsiveness could improve; satisfaction remains high.
Support online is definitely a ten out of ten.
Associate Business Manager at a tech services company with 11-50 employees
When we face issues, we raise a ticket through the valid portal, and they respond immediately and assign a local engineer to coordinate the support process.
Senior System Engineer at a financial services firm with 10,001+ employees
On a scale of one to ten, I would rate Dell's technical support a ten.
System Support at City of North Las Vegas
Sometimes, the support was inadequate because the initial architecture was poorly defined.
Pre-Sales Director France, Belgium and Luxembourg at a tech vendor with 5,001-10,000 employees
We are also using it ourselves for the SAN and CIFS protocol.
System Engineer at a computer software company with 1,001-5,000 employees
They often provide basic solutions, such as suggesting a failover or a power cycle, which are not the sophisticated solutions we expect from a vendor.
Senior Cloud System Engineer at Atos Poland
 

Scalability Issues

Sentiment score
7.0
Dell PowerScale seamlessly scales for diverse industries, integrating new nodes effortlessly to accommodate vast datasets in changing environments.
Sentiment score
7.3
NetApp FAS Series offers seamless, flexible scaling with effective data management, though it may require additional hardware and involve cost considerations.
We started on PowerScale with around about 300 terabytes and are now two and a half petabytes, still on the same file system.
Storage Architect at a educational organization with 10,001+ employees
That's really saved us in certain areas as we didn't have funding to expand Dell PowerScale (Isilon) until next year, which is why we utilized the cloud pools functionality to offload.
Senior Infrastructure Specialist at a healthcare company with 10,001+ employees
As an unstructured data storage solution, writing into it and accessing it from the other nodes is highly scalable with no issues.
Senior Technical Engineer at a tech vendor with 10,001+ employees
We normally avoid current versions and use versions that have been running for at least two months in client usage before updating drivers.
DIRECTOR at Vellore Online Systems
NetApp FAS Series is scalable, and it is possible, but you need to pay.
System Engineer at a computer software company with 1,001-5,000 employees
The NetApp FAS Series is scalable and offers numerous solutions, but only if customers are willing to invest in the shelves.
Senior Cloud System Engineer at Atos Poland
 

Stability Issues

Sentiment score
8.0
Dell PowerScale is highly stable, offering minimal downtime, effective data protection, and reliable performance for critical tasks.
Sentiment score
7.9
NetApp FAS Series is praised for reliable performance, minimal issues, swift support, and exceptional stability despite occasional firmware challenges.
Since we have good protection levels, the data is secured and replicated across the disks.
Associate Business Manager at a tech services company with 11-50 employees
Even if a node goes down, other nodes can respond and provide data back to the user without issues.
Storage Platform Engineer at Expedia Group
I assess the stability and reliability of Dell PowerScale (Isilon) as perfect.
Storage & Data Protection Specialist at General Dynamics Land Systems
When panic occurs on the node, it reboots itself, and we have experienced numerous hardware-related issues.
Senior Cloud System Engineer at Atos Poland
Most things are tailor-made, and we avoid downtimes even with primitive CLI commands.
DIRECTOR at Vellore Online Systems
 

Room For Improvement

Dell PowerScale faces challenges in deployment complexity, pricing, support services, storage management, security features, and hardware replacement protocols.
Users seek improved documentation, speed, cost-effectiveness, third-party integration, intuitive UI, security, and storage flexibility for NetApp FAS Series.
Firmware or software updates become effortless with Pure, but with Dell PowerScale (Isilon), we must evaluate or conduct trial runs to ensure that these operations will not harm our customer's system; their software is not adequate.
Senior Ai Architect at Logicalis
It should be made more user-friendly in the sense that if I manage it, I should be able to deploy it without having to have a lot of interaction from support.
Manager, Information Technology at a transportation company with 11-50 employees
Hardware failures under warranty should be addressed within the promised timeline.
Senior Engineer at Continental Tire
Storage companies should create encrypted storage solutions between the OS and storage to protect against ransomware attacks.
DIRECTOR at Vellore Online Systems
Nutanix leads the business in this approach, and I feel that NetApp is missing some aspects, such as CPU, GPU, and RAM, in its AI portfolio.
Pre-Sales Director France, Belgium and Luxembourg at a tech vendor with 5,001-10,000 employees
There is an opportunity there for NetApp with Cloud Volumes ONTAP.
Technological Consultant at a computer software company with 11-50 employees
 

Setup Cost

Enterprise users consider Dell PowerScale expensive but appreciate its performance, features, and scalability, viewing it as fair value.
NetApp FAS pricing is high but competitive due to features and discounts, offering long-term value with upgrade fees.
It's quite expensive for the amount of storage we have.
Senior Infrastructure Specialist at a healthcare company with 10,001+ employees
Cheaper nodes will cost less, while higher performance nodes will be pricier.
Storage Platform Engineer at Expedia Group
Costs align well with what it delivers, making it a fair price for a powerful tool that meets all our needs.
Tv Systems Technical Supervisor at a media company with 501-1,000 employees
SSDs are more cost-friendly, yet HDDs are higher in cost.
Analyst at Sutherland Global Services
The pricing of NetApp FAS Series is not cheap, but in comparison to other vendors, NetApp FAS Series is affordable.
System Engineer at a computer software company with 1,001-5,000 employees
 

Valuable Features

Dell PowerScale offers scalable, stable, and flexible storage solutions with high capacity, seamless integration, and strong data protection features.
NetApp FAS Series users praise its reliability, high performance, efficient data protection, and seamless cloud integration with robust support.
Dell PowerScale offers high scalability and stability as well, making it a valuable solution for enterprises.
Senior System Engineer at Atlas Security
In our AI initiatives, Dell PowerScale (Isilon) plays a significant role in data analysis, data fusion; principally, it is involved in data analysis, data extraction, and statistical analysis.
Senior Technologist at a university with 1,001-5,000 employees
Single files are limited to four terabytes in our configuration, however, the system can support up to 16 terabytes, so we can scale based on that too.
Systems Engineer at Unisity LLC
While NVMe disks are expensive and require three disks for parity calculations, hard drives in NetApp FAS Series are inexpensive, making it more cost-efficient per GB, even with RAID tech implementation.
Senior Cloud System Engineer at Atos Poland
Our IOPS are very high, reaching somewhere about 50k to 150k or 1.150k.
DIRECTOR at Vellore Online Systems
With the data management features of Data ONTAP, I have not experienced data loss or unavailability as I have SnapMirror, Snapshot, and SnapVault in place.
Analyst at Sutherland Global Services
 

Categories and Ranking

Dell PowerScale
Ranking in NAS
1st
Average Rating
8.8
Reviews Sentiment
7.0
Number of Reviews
98
Ranking in other categories
File and Object Storage (1st)
NetApp FAS Series
Ranking in NAS
3rd
Average Rating
8.6
Reviews Sentiment
7.0
Number of Reviews
111
Ranking in other categories
Deduplication Software (4th), Modular SAN (Storage Area Network) (1st)
 

Mindshare comparison

As of August 2026, in the NAS category, the mindshare of Dell PowerScale is 13.8%, down from 17.5% compared to the previous year. The mindshare of NetApp FAS Series is 10.3%, down from 11.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
NAS Mindshare Distribution
ProductMindshare (%)
Dell PowerScale13.8%
NetApp FAS Series10.3%
Other75.9%
NAS
 

Q&A Highlights

AV
President & CEO at a tech services company with 51-200 employees
Mar 12, 2020
 

Featured Reviews

RahulSharma8 - PeerSpot reviewer
Storage Platform Engineer at Expedia Group
Unified file sharing has simplified multi-tenant access and has delivered seamless data replication
Dell PowerScale (Isilon) includes its replication features; when we decommissioned our old Isilon cluster, we migrated all of the data to a new cluster, and it was pretty seamless. All you have to do is create the certificates and make those certificates available to the target cluster, then initiate a few jobs. The inter-cluster replication feature, called SyncIQ, allows you to set up all of the jobs and move your data entirely, either timely or all at once. Another suitable feature is the ability to back up your directories; you can take snapshots for all of your directories, and in fact, I believe you can take around a thousand snapshots for a single directory. The inter-replication, geo-replication is one feature. Dell provides a variety class of hardware suitable for your workloads, meaning if your data is just lab and not critical, you don't have to spend much on the hardware; conversely, if your data is mission-critical, you can buy a high-performance node from Dell. Additionally, you can span Dell PowerScale (Isilon) cluster to a large number of nodes, and code upgrades are pretty smooth because all protocols will be upgraded under a single piece of code. Since it provides a single file system that spans across the nodes, you don't have to worry about that directory structure being separately created on individual nodes, making it a fitting solution for a data lake solution because you can access the same data from multiple protocols.
Srikanth Purushothaman - PeerSpot reviewer
DIRECTOR at Vellore Online Systems
Has supported long-term data protection and backup while requiring better part availability and pricing options
For monitoring purposes, we normally use flash access storage exclusively. We utilize a hybrid system because we need performance, combining NL-SAS for the volume and SAS flash to use as a fast cache system that provides more IOPS. We normally implement RAID 10, which we prefer over RAID 6's n plus 2 combinations. We utilize it for data redundancy, even with write intensity on. Regarding the unified storage architecture for NetApp FAS Series, we normally opt for exclusivity unless budget constraints exist. Our IOPS are very high, reaching somewhere about 50k to 150k or 1.150k. The high performance ensures minimal latency. An advantage we've seen with NetApp FAS Series is that snapshots provide very rapid backup and fast recovery. We basically use snapshots for data protection as first-level protection, with deduplication between the two storages serving as second-level protection.
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Answers from the Community

AV
President & CEO at a tech services company with 51-200 employees
Mar 12, 2020
Mar 12, 2020
Isilon is Scale-out storage, while NetApp is Active-Standby storage. Regarding the performance issue based on the field engineer’s experience, Isilon is better than NetApp in case of a huge amount of io, while NetApp is better than Isilon in case of a medium amount of IO.
2 out of 3 answers
BH
Board Member, former President/CTO at a computer software company with 1-10 employees
Mar 9, 2020
My recommendation is to take a close look at our CS Concerto Scale-Out Cluster system.
SK
Sales Director at a tech services company with 51-200 employees
Mar 10, 2020
Isilon is Scale-out storage, while NetApp is Active-Standby storage. Regarding the performance issue based on the field engineer’s experience, Isilon is better than NetApp in case of a huge amount of io, while NetApp is better than Isilon in case of a medium amount of IO.
 

Top Industries

By visitors reading reviews
Manufacturing Company
10%
Financial Services Firm
9%
Government
8%
Computer Software Company
7%
Financial Services Firm
12%
Manufacturing Company
12%
Computer Software Company
8%
Construction Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business28
Midsize Enterprise23
Large Enterprise55
By reviewers
Company SizeCount
Small Business31
Midsize Enterprise38
Large Enterprise59
 

Questions from the Community

What is your experience regarding pricing and costs for Dell EMC PowerScale (Isilon)?
My experience with pricing, setup cost, and licensing for Dell PowerScale has been expensive. Setup costs or provisioning experience has been pleasant. Typically you have kickoff meetings and there...
What needs improvement with Dell EMC PowerScale (Isilon)?
For improvements, we can focus on enhancing performance, upgrading the nodes, and accessing data through Isilon for more efficiency. Additionally, improvements to interfaces and certain aspects of ...
What is your primary use case for Dell EMC PowerScale (Isilon)?
Dell PowerScale is our main NAS environment storage where we create CIFS and NFS file shares for users.When users request a CIFS file share, they specify the SMB share name and the SmartConnect zon...
Which SAN product would you choose: IBM FlashSystem (FS9500) vs PureFlash Array/X NVMe vs PureFlash Array/XL NVMe?
Have you considered a NetApp FAS Storage for your NAS needs? I am sure it fits very well.
What is your experience regarding pricing and costs for NetApp FAS Series?
Regarding its pricing, I believe it is high. I utilize both HDD and SSD, where SSDs are more cost-friendly, yet HDDs are higher in cost, making it not very affordable but still useful. For general ...
What needs improvement with NetApp FAS Series?
Regarding improvements for NetApp FAS Series, I think everything is generally good. If there is a need to improve something, they can extend their support. Previously, in my company, I only saw Net...
 

Also Known As

PowerScale, Dell EMC Isilon
No data available
 

Overview

 

Sample Customers

OMRF, University of Utah, Translational Genetics Research Institute, Arcis, Geofizyka Torumn, Cyprus E&P Corporation, Colburn School, Columbia Sportswear, Harvard Medical School, University of Michigan, National Library of France,
Children's Hospital Central California, Plex Systems, PDF PNI Digital Media, Denver Broncos, PDF KSM Legal, Clayton Companies, Virginia Community College
Find out what your peers are saying about Dell PowerScale vs. NetApp FAS Series and other solutions. Updated: August 2026.
908,858 professionals have used our research since 2012.