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Dell PowerScale (Isilon) vs Nutanix Unified Storage (NUS) comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Nov 4, 2024

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
6.6
Pure Storage FlashBlade reduces total cost of ownership by enhancing efficiency, enabling fast restorations, and supporting diverse use cases.
Sentiment score
7.1
Dell PowerScale enhances management efficiency and scalability, improving storage performance, reducing costs, and delivering strong ROI and peace of mind.
Sentiment score
6.9
Nutanix Unified Storage boosts ROI by reducing costs, enhancing uptime, scalability, and efficiency, while improving data management and productivity.
It does not require much management once you set up correctly, so it saves time, allowing an admin to focus on other work.
Despite being more expensive than Huawei, it is stable and most enterprises accept the price due to its stability.
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.
The second cluster of Dell PowerScale (Isilon) gives us flexibility for small things like code upgrades, all the way to scenarios where we have lost this data center or data, allowing us to check if data is still intact on the other side.
For me, the biggest return on investment when using this solution is that we do not have to have much support staff to run it.
The scalability challenge with previous systems is lessened with Nutanix since we can expand by adding new hardware without needing migrations.
We are saving approximately 20% to 25% compared with the competition.
 

Customer Service

Sentiment score
7.6
Pure Storage FlashBlade's support is generally praised for responsiveness, despite occasional delays and communication issues, maintaining a favorable reputation.
Sentiment score
8.2
Dell PowerScale (Isilon) support is praised for expertise but criticized for first-line issues and occasional communication barriers.
Sentiment score
7.5
Nutanix Unified Storage customer service is efficient and knowledgeable, with high satisfaction but room for improvement in complex cases.
I would rate them an eight out of ten.
The support is done through email and is not that great, making it a very problematic area I've been dealing with for over four years.
Their technical support has been perfect lately, so I would give it a 10.
Support online is definitely a ten out of ten.
Dell provides support within four hours, and they always fulfill their promises.
They have managed previous issues well.
They come on the call, start troubleshooting immediately, and resolve issues effectively.
They are very knowledgeable, and if they can't solve the problem, they find the answer within a day or so.
I would give the customer service and technical support a ten out of ten.
 

Scalability Issues

Sentiment score
8.6
Pure Storage FlashBlade excels in scalability, with seamless expansion, downtime-free growth, and praised support across various sectors.
Sentiment score
7.4
Dell PowerScale offers scalable, flexible storage for growing enterprises, supporting seamless capacity expansion and stable performance with automatic tiering.
Sentiment score
7.8
Nutanix Unified Storage offers scalable, efficient, and stable storage expansion with easy integration and intuitive licensing for diverse environments.
Pure Storage FlashBlade is scalable.
There are between 5 and 10,000 people using it in our organization.
We started on PowerScale with around about 300 terabytes and are now two and a half petabytes, still on the same file system.
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.
Dell PowerScale is highly scalable, as evidenced by the reduced physical hardware and the efficient use of rack space.
This means you don't have to buy everything upfront; you can buy what you need and add more as you grow, which is advantageous.
These three components utilize scalability tools, enabling storage addition to nodes and supporting independent, linear performance growth.
I find the scalability of Nutanix Unified Storage (NUS) to be excellent, and I would rate it a ten based on my clients' requirements.
 

Stability Issues

Sentiment score
8.1
Pure Storage FlashBlade offers exceptional reliability and impressive stability, featuring 99.999% uptime, seamless upgrades, and high performance.
Sentiment score
8.1
Dell PowerScale is reliable and easy to manage, with high availability despite occasional support and load balancing issues.
Sentiment score
8.0
Nutanix Unified Storage is stable and reliable, offering smooth upgrades, quick issue resolution, and effective technical support.
In case there is any issue with any blade, the data is moved to another.
Since we have good protection levels, the data is secured and replicated across the disks.
I assess the stability and reliability of Dell PowerScale (Isilon) as perfect.
I find the product to be resilient and stable. There's no downtime and no crashes.
We have not experienced these issues with Nutanix, which I attribute to the all-flash technology, the quality of their platform, and the responsiveness of the hyper-converged infrastructure.
Nutanix Unified Storage (NUS) is very stable.
It automatically triggers tasks, causing performance issues.
 

Room For Improvement

Users recommend better pricing, cloud integration, support, documentation, and analytics for Pure Storage FlashBlade, improving efficiency and compatibility.
Dell PowerScale is costly and lacks cloud integration, with usability, support, and management improvements needed for better user experience.
Nutanix Unified Storage requires upgrades in storage capabilities, ease of use, FTP compatibility, analytics, security, support, and pricing.
Technical support definitely needs significant improvement.
Its configuration should be easier.
One way Pure Storage FlashBlade can be improved is by having more compatibility between the FlashArray and FlashBlade.
Hardware failures under warranty should be addressed within the promised timeline.
I would want to see more AI features with Dell PowerScale (Isilon).
If I could improve one thing on Dell PowerScale (Isilon), it would be better object storage as it recently breached into S3, and that capability could be broadened.
The main concern is pricing, which could deter some customers; addressing this would enhance its appeal.
The system should move towards AI-driven optimization and enhance S3 object storage capabilities.
System downtime can disturb the entire ecosystem and impact all applications.
 

Setup Cost

Pure Storage FlashBlade is costly but valued for performance, reliability, and reduced administrative overhead, justifying its premium price.
Dell PowerScale, though costly initially, provides valuable features, ease of management, and competitive pricing for business needs.
Nutanix Unified Storage offers competitive pricing, appreciated for cost-effectiveness, but may be expensive for small businesses or specific regions.
The pricing of Pure Storage FlashBlade is expensive compared to other products I used from other companies in the past, but one benefit is that they have built-in ransomware protection.
Regarding pricing, it is okay; we needed exactly this in size, and the price was a lot lower than competitors, making it good for us.
It's quite expensive for the amount of storage we have.
My experience with pricing, setup costs, and licensing for Dell PowerScale (Isilon) shows it's a premium platform, so it's a big amount of money.
The pricing is excellent.
Compared to buying three or four vendor solutions, it is much cheaper.
The cost has doubled for the same amount of data, which was a challenge when presenting use case justifications for the increased cost.
Nutanix Unified Storage (NUS) has definitely helped reduce our total cost of ownership.
 

Valuable Features

Pure Storage FlashBlade excels with ease of use, fast performance, scalability, seamless integration, and efficient storage features.
Dell PowerScale excels in scalability, performance, and security, offering efficient storage consolidation and resource optimization for organizations.
Nutanix Unified Storage offers scalability, efficiency, robust security, seamless cloud integration, and simplifies IT management, enhancing storage reliability.
We can plug in many blades, and we can have data up to one terabyte.
The best features of Pure Storage FlashBlade include better throughput and better performance.
Pure Storage FlashBlade's scalability is one of the most valuable features, and importantly, it always works, allowing for seamless upgrades.
Dell PowerScale offers high scalability and stability as well, making it a valuable solution for enterprises.
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.
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.
Nutanix Unified Storage (NUS) is appreciated for its fault tolerance and redundancy at the cluster level, which ensures reliable storage of files, folders, and other information accessible on the client side.
The cybersecurity features of Nutanix Unified Storage (NUS) when dealing with unstructured data, such as ransomware threats, provide the ability to detect and back up block-based storage, allowing me to restore repositories or sets of block storage with one button click, which is automatic.
My experience with using Nutanix Unified Storage (NUS) for data-intensive workloads is that we have many SQL Servers and they perform much better than they did when we used hybrid converged previously.
 

Categories and Ranking

Pure Storage FlashBlade
Sponsored
Ranking in File and Object Storage
8th
Average Rating
8.8
Reviews Sentiment
7.5
Number of Reviews
39
Ranking in other categories
All-Flash Storage (15th), Software Defined Storage (SDS) (8th)
Dell PowerScale (Isilon)
Ranking in File and Object Storage
3rd
Average Rating
9.0
Reviews Sentiment
7.4
Number of Reviews
67
Ranking in other categories
NAS (2nd)
Nutanix Unified Storage (NUS)
Ranking in File and Object Storage
2nd
Average Rating
8.8
Reviews Sentiment
7.2
Number of Reviews
114
Ranking in other categories
All-Flash Storage (5th), Software Defined Storage (SDS) (3rd), Public Cloud Storage Services (5th), NVMe All-Flash Storage Arrays (4th)
 

Mindshare comparison

As of October 2025, in the File and Object Storage category, the mindshare of Pure Storage FlashBlade is 5.7%, down from 6.2% compared to the previous year. The mindshare of Dell PowerScale (Isilon) is 8.6%, up from 8.1% compared to the previous year. The mindshare of Nutanix Unified Storage (NUS) is 3.0%, up from 2.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.
File and Object Storage Market Share Distribution
ProductMarket Share (%)
Nutanix Unified Storage (NUS)3.0%
Dell PowerScale (Isilon)8.6%
Pure Storage FlashBlade5.7%
Other82.7%
File and Object Storage
 

Featured Reviews

MikaelHellström - PeerSpot reviewer
Has handled backup storage needs reliably and supports seamless upgrades
In environments requiring high throughput and low latency, Pure Storage FlashBlade provides high throughput and normal latency, but we do not have any application that requires low latency right now, so the latency of three to five milliseconds is considered kind of high. Pure Storage FlashBlade's ability to integrate with enterprise applications is not important for us, as we only want to present an S3 bucket for our backup, which we have done, and it works very fast. We use the Purity software's data reduction techniques; we have a backup software that compresses everything before sending it to the S3 bucket, achieving a data reduction of 1.1 to one. I would recommend Pure Storage FlashBlade to other companies because it's a very fast and scalable solution for anyone who needs it. On a scale of 1-10, I rate this solution an 8.
Scott Taylor - PeerSpot reviewer
Manages large data sets efficiently with hybrid cloud integration
My organization is quite large, with about 30,000 employees. The growth has been substantial in areas such as radiology and genomics. One of the best features we've utilized recently is offload to cloud pools due to capacity constraints on-premise. We didn't want to expand Dell PowerScale (Isilon) straight away, so we utilized cloud pools to offload some data to Azure. 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.
Amarnath Charugundla - PeerSpot reviewer
Unified management and cost-effectiveness lead to positive experiences and future savings
Improvement is necessary wherein the memory or storage should not breach 90%, because if breached, it becomes unmanageable. We have to set alerts or CPU triggering for 95% for the first warning. Other activities on nodes or file systems should be properly maintained. We must monitor the dashboard for P1, P2 alerts in the Nutanix Unified Storage (NUS) file share system including SMB, NFS, objects, and blocks. Attention should be maintained for any alerts such as CPU, memory, and RAM alerts, as exceeding these creates issues within teams. If triggered to 95% and forgotten, it crosses the SLA breach, causing disturbances to application, web, and platform teams. Continuous monitoring on the Nutanix dashboard is essential. Even a highly experienced person in Nutanix Unified Storage (NUS) cannot provide a 10 rating out of 10 because it is a vast system. I would rate it eight from my perspective.
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Top Industries

By visitors reading reviews
Computer Software Company
12%
Financial Services Firm
11%
Manufacturing Company
10%
Government
7%
Computer Software Company
12%
Manufacturing Company
11%
Financial Services Firm
9%
Government
8%
Computer Software Company
28%
Manufacturing Company
9%
Educational Organization
6%
Financial Services Firm
5%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business11
Midsize Enterprise11
Large Enterprise21
By reviewers
Company SizeCount
Small Business16
Midsize Enterprise17
Large Enterprise36
By reviewers
Company SizeCount
Small Business27
Midsize Enterprise30
Large Enterprise63
 

Questions from the Community

What do you like most about Pure Storage FlashBlade?
The tool's most valuable feature is its fast performance, especially in handling snapshots. It helps during power out...
What is your experience regarding pricing and costs for Pure Storage FlashBlade?
The pricing of Pure Storage FlashBlade is expensive compared to other products I used from other companies in the pas...
What needs improvement with Pure Storage FlashBlade?
I believe there is not much improvement needed because they have everything we need, but the interface is a little bi...
What do you like most about Dell EMC PowerScale (Isilon)?
The solution provides massive performance, scalability, efficiency, and ease of management.
What is your experience regarding pricing and costs for Dell EMC PowerScale (Isilon)?
The cost is competitive with other vendors such as HP. I always compare prices between two vendors, and they are good...
What needs improvement with Dell EMC PowerScale (Isilon)?
Sometimes, it takes too long to set up everything. That's something I would want them to improve. The main challenge ...
What do you like most about Nutanix Unified Storage?
Nutanix has excellent product documentation available on their portals, written in simple, easy-to-understand language.
What is your experience regarding pricing and costs for Nutanix Unified Storage?
It is very cost-effective compared to the traditional environment. With new hardware, it's a long-term investment but...
What needs improvement with Nutanix Unified Storage?
To improve Nutanix Unified Storage (NUS), cost is always an issue for every company, especially when we talk about la...
 

Also Known As

No data available
PowerScale, Dell EMC Isilon
Nutanix Files Storage, Nutanix Volumes Block Storage, Nutanix Objects Storage
 

Overview

 

Sample Customers

ServiceNow, Mercedes-AMG Petronas Motorsport, Dominos, Man AHL
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,
JetBlue, International Speedway Corporation, Volkswagen SAIC, Brighton and Hove City Council, Foresters Financial, Janus International Group, Cloud Comrade, Serco
Find out what your peers are saying about Dell PowerScale (Isilon) vs. Nutanix Unified Storage (NUS) and other solutions. Updated: September 2025.
871,358 professionals have used our research since 2012.