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Dell PowerScale vs NetApp FAS Series comparison

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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
6.0
Dell PowerScale offers cost-efficiency and scalability benefits, though some face user adoption challenges and higher initial costs.
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
7.2
Dell PowerScale support is responsive and knowledgeable, but users report delays with first-level assistance and varying engineer efficiency.
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
6.8
Dell PowerScale offers seamless scalability, enabling growth and efficient data management with flexible on-premises and cloud integration.
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
8.1
Dell PowerScale excels in stability, reliability, adaptability, near-perfect uptime, and effective data protection, despite occasional support issues.
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 can confirm that we have experienced six years of zero seconds of downtime.
Technical Engineer at the company in service is
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 requires better pricing, intuitive interface, easier deployment, enhanced performance, security improvements, and advanced cloud and AI integration.
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
Regarding Dell PowerScale's AI capabilities, I believe its governance and security are more important for financial or government sectors, so governance and security will require additional upgrades and hardening.
Storage engineer at a financial services firm with 10,001+ employees
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

Dell PowerScale offers high pricing but justifiable value for enterprise users due to features, scalability, and flexible licensing.
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 storage, multi-protocol access, efficient data protection, and user-friendly integration for diverse workloads.
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
6.9
Number of Reviews
113
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 October 2026, in the NAS category, the mindshare of Dell PowerScale is 13.3%, down from 16.5% compared to the previous year. The mindshare of NetApp FAS Series is 9.8%, down from 10.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.
NAS Mindshare Distribution
ProductMindshare (%)
Dell PowerScale13.3%
NetApp FAS Series9.8%
Other76.9%
NAS
 

Q&A Highlights

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

Featured Reviews

Santosh Bharadwaj Rangavajjula - PeerSpot reviewer
Product Manager at a manufacturing company with 10,001+ employees
File sharing has supported collaboration and disaster recovery but security support still needs work
Dell PowerScale can improve specifically for AI workloads, particularly on the MCPs. I would add that we have not seen an official MCP from Dell PowerScale and are relying on open source. It would be valuable to have an MCP server that we can set up directly with them. Regarding Dell PowerScale's AI capabilities, I think its governance and security could be better. We have Superna that we buy along with Dell PowerScale, but we are seeing very big problems with integrating it. Superna is primarily for the security use case, as we want to prevent cybersecurity attacks and ransomware attacks. If Dell is providing this as a supplementary feature, it should provide better support. Regarding Dell PowerScale's AI capabilities, I do not see much accuracy and reliability of output. This is actually a security problem because Dell does not provide official MCP servers while most other vendors are providing it. This forces us to rely on open source, which is not secure. Dell PowerScale plays a role in my organization's AI initiatives as we want to use the Metadata IQ functionality from Dell PowerScale; however, there is not enough support and extensive documentation for us to be able to do this.
GM
Analyst at Sutherland Global Services
Unified storage has protected critical data and supports smooth admin work for diverse workloads
In my experience with NetApp FAS Series, I found the CLI commands to be very valuable and easy to understand, unlike other storage products. I can use just the show command to see something, and it helps me narrow down issues quickly, which makes CLI easy for me. I use snapshot technology in NetApp FAS Series. The snapshot technology has helped me in data protection. For example, during an upgrade of our ONTAP version at my workplace, it did not reflect properly despite the upgrade being completed. I had a VMware snapshot from another team, and that was helpful for me to retrieve the data right after the failed upgrade. I use snapshots frequently, maintaining a snapshot policy of 28 days which allows me to help users retrieve files they are unable to access. In maintaining data integrity in my operations with RAID DP, I see that it helps me significantly. If two or more disks fail, it gives me time to work on replacements. If only one disk fails without RAID DP, I would lose data and connection, but with RAID DP, I have that time to act without losing or making data unavailable to users. The data management features of Data ONTAP are highly valuable for my organization in terms of data security and compliance. I have not experienced data loss or unavailability as I have SnapMirror, Snapshot, and SnapVault in place. This helped prevent escalations. While I faced some access issues or slowness, severe data loss has not been an issue, and I resolve issues within one to two hours with the data integrity these tools provide.
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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
11%
Outsourcing Company
9%
Financial Services Firm
9%
Government
7%
Financial Services Firm
12%
Manufacturing Company
11%
Outsourcing Company
10%
Comms Service Provider
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business32
Midsize Enterprise24
Large Enterprise70
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)?
I think the price is reasonable. We procured this during the time of COVID, around 2022, and the price was very competitive. If you are looking for technology, there will also be a price associated...
What needs improvement with Dell EMC PowerScale (Isilon)?
The disadvantage that I felt is not hardware-related. I feel that Dell needs to focus on the service aspects. Once they sell this hardware to customers, customers also expect service from them. Del...
What is your primary use case for Dell EMC PowerScale (Isilon)?
Dell PowerScale is used for keeping our company data. Continental is an automotive company, and we keep recording files on a petabyte basis. We have globally around more than 200 petabytes of Dell ...
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: September 2026.
919,586 professionals have used our research since 2012.