Dell Unity XT vs IBM FlashSystem 9100 NVMe comparison

Dell Technologies and IBM are both solutions in the All-Flash Storage category. Dell Technologies is ranked #6 with an average rating of 8.6, while IBM is ranked #18 with an average rating of 8.8. Dell Technologies holds a 6.0% mindshare in AFS, compared to IBM’s 0.5% mindshare. Additionally, 96% of Dell Technologies users are willing to recommend the solution, compared to 95% of IBM users who would recommend it.

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Executive SummaryUpdated on Sep 18, 2024

Dell Unity XT and IBM FlashSystem 9100 NVMe compete in the enterprise storage solutions category. Dell Unity XT offers affordability, while IBM FlashSystem 9100 NVMe stands out with advanced performance features, justifying its higher cost.

Features: Dell Unity XT is recognized for scalability, flexible configuration options, and effective performance. IBM FlashSystem 9100 NVMe impresses with high-speed performance, integrated data reduction technologies, and exceptional reliability. While both offer robust features, IBM's high-speed capabilities stand out.

Room for Improvement: Dell Unity XT could benefit from enhanced deduplication, improved compression efficiency, and more advanced storage efficiency technology. IBM FlashSystem 9100 NVMe users recommend an easier upgrade process, better support for modern data formats, and a simplified management interface. Dell focuses on storage efficiency, and IBM emphasizes upgrade simplicity.

Ease of Deployment and Customer Service: Dell Unity XT is praised for a straightforward deployment process and highly responsive customer support. IBM FlashSystem 9100 NVMe users find deployment manageable but have mixed experiences with support. Dell edges ahead in ease of deployment and customer experience.

Pricing and ROI: Dell Unity XT is favored for cost-effectiveness, offering good ROI for budget-conscious businesses. IBM FlashSystem 9100 NVMe, while more expensive, delivers superior ROI through advanced capabilities and performance enhancements. Users find the investment in IBM justified by its returns.

To learn more, read our detailed Dell Unity XT vs. IBM FlashSystem 9100 NVMe Report (Updated: September 2025).

Buyer's Guide

Dell Unity XT vs. IBM FlashSystem 9100 NVMe

September 2025

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Review summaries and opinions

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

Categories and Ranking

Pure FlashArray X NVMe

Mindshare comparison

As of November 2025, in the All-Flash Storage category, the mindshare of Pure FlashArray X NVMe is 1.1%, up from 0.7% compared to the previous year. The mindshare of Dell Unity XT is 6.0%, down from 9.4% compared to the previous year. The mindshare of IBM FlashSystem 9100 NVMe is 0.5%, down from 0.5% compared to the previous year. It is calculated based on PeerSpot user engagement data.

All-Flash Storage Market Share Distribution
Product	Market Share (%)
Dell Unity XT	6.0%
Pure FlashArray X NVMe	1.1%
IBM FlashSystem 9100 NVMe	0.5%
Other	92.4%

All-Flash Storage

Featured Reviews

Jaehoon Oh

Chief Technology Officer at Lambda256

Supports efficient storage management through volume snapshots and offers reliable non-disruptive upgrades

I have no specific improvements to suggest for Pure FlashArray X NVMe at this time. The performance statistics could be enhanced. I can see the performance statistics in the Pure Storage console, but it does not show the performance by 4K byte unit. It displays IOPS and bandwidth, but IOPS is about real use, and I want to know how many IOPS are currently running in 4K byte units. I cannot see that IOPS because most storage systems report their performance by 4K byte unit. I want to see Pure Storage performance by 4K byte unit to compare with other storage or other internal NVMe SSD.

Read full review

Syed Habib

Head of Infrastructure Security (S.A.V.P) at EXIM Bank Ltd

Efficient data replication and fast IOPS have improved operational performance

Dell and a partner jointly implemented this solution in Auvink. We installed the Flash, which makes our IO operations fast and efficient. Replication is available, allowing us to replicate data simultaneously from one site to another. All-flash technology and vTXT enhance speed, and the IOPS are faster. The cache's IOPS are much better. Snapshots provide a unique feature for testing and make management more comfortable and easy. The platform is multi-supported and certification is more convenient and easy to manage.

Read full review

MohammedIsmail

Datacenter Manager at Tracker Connect

Enhanced storage performance and an easy setup with compression challenges

We use IBM FlashSystem 9100 NVMe as a storage device in the IT industry The features I find most valuable include its use for storage and performance. The solution's compression needs to be improved, as it's not the best. Furthermore, support from the partner could also be improved as it's been…

Read full review

Quotes from Members

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

Pros

"The database workloads are pretty fast because I frequently move data from here to there."

"The most valuable feature of this solution is its ease of use."

"Everything, especially the VMs inside, is pretty fast."

"The most valuable features of this solution are its ease of use and performance."

"It has good, reliable, fast storage."

"Technical support has been helpful and responsive."

"Pure FlashArray X NVMe helps to improve our processing speed. It is user-friendly and easy to use."

"It's helped us because we've changed fundamentally what we talk about. We don't talk about storage and different tiers of storage anymore nor do we talk about servers. We talk now about applications and how applications impact the business and end users."

More Pure FlashArray X NVMe pros

"Compared to older generations of arrays there is quite an improvement, compared to the older VNXs, for example. It depends on you use it, but for our purposes, we find Unity simple to use."

"We're able to access it from just about anywhere, as long as we have access to a browser. That feature is really neat because sometimes we will go to a different data center or a different site, and if we need to access it to see a LUN or to see any type of storage, we can do that. That's one of the big takeaways with Unity."

"The NAS capability is mainly what we're looking for from this product, and being able to recover fast in DR."

"The UI itself is fantastic, and the ease of administration is far better than Unisphere or Navisphere ever were. It's very easy to manage. The fact that it has built-in APIs means our automation people can help us automate a lot of tasks, and that has been helpful. And, of course, it's really fast. Obviously, that doesn't hurt anything at all."

"It's very reliable. I have not had an issue with Dell EMC Unity."

"The high availability of Dell EMC Unity XT has been the most important feature."

"On the Data Domain side, the most attractive feature is the compression ratio, which none of the other products in the market are currently able to provide. On the Unity side, what customers mostly like is the availability guarantee."

"We've never had an issue with storage."

More Dell Unity XT pros

"The features I find most valuable include its use for storage and performance."

"The high performance and high availability improved our overall processes."

"It's easy to use, has good stability, and many features."

"Its ease of use, performance, and hardware compression is very useful feature."

"What I like about the product are its high availability, maximum efficiency in performance, and its ability to handle a high level of I/O operations."

"The FlashCore modules support more value to the architecture due to their unique characteristics."

"Good performance with a user-friendly UI."

"IBM FlashSystem 9100 NVMe is one of the leading storage systems in the world...I rate the solution's stability a ten out of ten."

More IBM FlashSystem 9100 NVMe pros

Cons

"If the customer only needs 500 terabytes and doesn't care how much data they'll put in the server, IBM is cheaper than Pure."

"In terms of what needs improvement, the dashboard and management could be simplified."

"You cannot tag a LUN with a description, and that should be improved. What I like on the Unity side is that when I expand LUNs or do things, there is an information field on the LUN. This is the Information field that you can tag on your LUNs to let yourself know, "Hey, I've added this much space on this date". Pure lacks that ability. So, you don't have a mechanism that's friendly for tracking your data expansions on the LUN and for adding any additional information. That's a downside for me."

"Every time I think of something that needs to improve, they're one step ahead, which I love. The only area I wish to see improve, I believe is coming, is in the FlashBlade product. Blade implementation fell short on a few of the services."

"We would like to see more visibility into garbage collection and CPU performance in the GUI."

"In the next release, I would like to see real-time analytics for further insight into consumption models."

"We would like to see VNC integration or be able to use Pure Storage with VNC."

"There are some challenges with data encryption and reduction."

More Pure FlashArray X NVMe cons

"The VNX reporting is much more granular, versus the Unity reporting."

"It could be improved in the area of management flexibility. For example, I really need to set read-only access for LUNs, and there's no such option with Unity XT."

"As the solution continues to grow and gain more traction, things will come up that will just continue to deepen the integration between VMware, vCenter, and all those other components. Anything in the divisibility there and additional tools is always great."

"My only complaint would be some of the CLI Help files could be a little more detailed, but that's very minor complaint. We were trying to run some commands just to see how the storage snaps were interacting with the storage array, and it was a little difficult to look up exactly what commands should be run. The Help files detailing what exactly the commands did wasn't as detailed as we would have wanted them to be."

"Improve the interface and provide more management capability."

"It needs deduplication. We'd like to have the dedupe capabilities in the Unity."

"The upgrade process needs improvement. I should be able to swap it out, with zero downtime, with another array, down the road. I don't think Dell EMC has anything in the roadmap for this product line. I just don't want to have to deal with that anymore and all of our customers are pretty much the same."

"Perhaps if they added more 10GB ports to the back of the system, so you have more IOPS out of the box itself to the network, that would help."

More Dell Unity XT cons

"In the future, the limitation is upgrading the same storage by adding a shelf to the desk. There is a limitation in the backend connection between the storage and extended shelf."

"I would like to have replication functionality built directly in the product, rather than having to use a separate device for this."

"I would like to see IBM products become more affordable because they can be quite expensive, which limits their accessibility to a broader customer base."

"IBM FlashSystem 9100 NVMe is an expensive solution, and its pricing could be improved."

"The support could be better."

"The tool's architecture is complex. It also needs to add data utilization reports."

"The solution's compression feature could be better."

"The ZIO interface could be improved."

More IBM FlashSystem 9100 NVMe cons

Pricing and Cost Advice

"As far as the licensing costs, everything is included in the license."

"Pretty much everything that you need is licensed when you buy the product. Licensing to me is different than the maintenance cost, but they can bleed into one another. We buy the product, and we expect three years of support bundled into what we negotiate on our storage arrays. I would start to see maintenance costs going into the fourth year, but we're not there yet."

"With Pure Storage, we would like to continue seeing price reductions with flash storage. I don't think we're any different than anybody else when we continue to look to the industry for price reductions of both NVMe and traditional SSD storage. We would like to see these prices continue to decline and erode, even displacing large spinning disks."

"With VMware, we pay $300,000 annually."

"The tool is an investment that we've budgeted for. While the prices may be higher than those of other vendors, we see it as a market leader with benefits. We don't regret purchasing it."

"Pure FlashArray X NVMe’s pricing is cheaper than other products."

"Our licensing fees are $500,000+ USD."

"We pay approximately $50,000 USD per year in licensing fees."

More Pure FlashArray X NVMe pricing and cost advice

"The support you're getting with it is probably an underestimated value that comes with the box you're buying."

"Looking at it based on cost per gigabyte, it's certainly very effective."

"The product’s pricing should be improved."

"There is not a license required for the use of the solution. We purchased a maintenance contract."

"Go with the virtual appliance versus the hardware."

"When I see other products—like HP, Huawei, and Lenovo—from competitors, I have seen a lot of disadvantages with EMC, price-wise. Huawei and Lenovo are very price competitive. Looking at the price point for a country like Sri Lanka, where we have a very low economy, I think you need to look at a pricing mechanism that is a bit more flexible."

"The flexibility is important. We still have a lot of customers that have a use case for non-flash, yet you can also build the flash version as well."

"The price is up a little bit from what we used to pay so I'm hoping that it's a little bit of a better system than the VNXe was. But I still think it's a good value. It's new, so I'm sure there's room for the pricing to drop."

More Dell Unity XT pricing and cost advice

"Price-wise, the solution offers excellent pricing to its users. In short, the prices offered by the solution are competitive compared to similar solutions."

"The price of IBM FlashSystem 9100 NVMele can be considered affordable when taking into account the operating system that is required for it to function properly. This operating system, which is licensed by IBM, may carry a higher cost, but it is worth the investment for larger corporate entities, such as insurance companies, Fortune Five companies, and banks, who make up a significant portion of their target market. The FlashSystems are designed for larger corporations and multinational enterprises, and may not be the most cost-effective solution for smaller businesses."

"It's a lot less costly than cloud storage. People get surprised by the cost of cloud storage, which is extremely expensive and four or five times the cost of storage on-premises. People don't realize what they're spending on storage until they start getting bills from Amazon, Microsoft, and others. This is a good way to reduce your cloud storage expenses."

"The tool's pricing is competitive."

"Compared to other solutions, the cost of IBM FlashSystem 9100 NVMe is reasonable, with a one-time payment of around $70,000. However, additional support is available for $25,000 for three years. The overall maintenance cost is steep."

"The price of IBM FlashSystem 9100 NVMe is less than Dell. For upgrades, the Dell solutions are more expensive."

"There are pricing options from the mid-rand to the high-range, of which the suitability depends upon the requirements."

"Compared to its competitors, IBM's offering is the most cost-effective."

More IBM FlashSystem 9100 NVMe pricing and cost advice

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Top Industries

By visitors reading reviews

Computer Software Company

13%

Manufacturing Company

11%

Financial Services Firm

10%

Government

Computer Software Company

16%

Manufacturing Company

11%

Financial Services Firm

Government

Computer Software Company

11%

Financial Services Firm

10%

Government

10%

Recreational Facilities/Services Company

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	15
Midsize Enterprise	11
Large Enterprise	12

By reviewers
Company Size	Count
Small Business	61
Midsize Enterprise	49
Large Enterprise	94

By reviewers
Company Size	Count
Small Business	8
Midsize Enterprise	8
Large Enterprise	5

Questions from the Community

What do you like most about Pure FlashArray X NVMe?

Pure FlashArray X NVMe helps to improve our processing speed. It is user-friendly and easy to use.

See all answers

What is your experience regarding pricing and costs for Pure FlashArray X NVMe?

The price of Pure FlashArray X NVMe is very expensive, though I do not know the actual price because I am using the E...

See all answers

What needs improvement with Pure FlashArray X NVMe?

I have no specific improvements to suggest for Pure FlashArray X NVMe at this time. The performance statistics could ...

See all answers

What is the Biggest Difference Between Dell EMC Unity and NetApp AFF?

I saw that you have doubts about what you chose. I have a lot of experience with the constructor, honestly I can reco...

See all answers

What is the Biggest Difference Between Dell EMC Unity and NetApp AFF?

They’re both great solutions and I’ve used both. EMC is being VERY aggressive on pricing which may be the undoing of...

See all answers

What is the Biggest Difference Between Dell EMC Unity and NetApp AFF?

First of all the decision should be taken looking at similar products in terms of capacity and performance. I will sh...

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What do you like most about IBM FlashSystem 9100 NVMe?

The storage serves the virtual environment. Most of our applications run in the virtual environment, and it serves ne...

See all answers

What is your experience regarding pricing and costs for IBM FlashSystem 9100 NVMe?

The tool is expensive, though I do not know the specific licensing costs.

See all answers

What needs improvement with IBM FlashSystem 9100 NVMe?

The solution's compression needs to be improved, as it's not the best. Furthermore, support from the partner could al...

See all answers

Comparisons

Dell PowerStore vs Pure FlashArray X NVMe

Compared 21% of the time

TrueNAS R-Series vs Pure FlashArray X NVMe

Compared 17% of the time

Dell PowerMax vs Pure FlashArray X NVMe

Compared 13% of the time

Pure Storage FlashBlade vs Pure FlashArray X NVMe

Compared 11% of the time

IBM FlashSystem vs Pure FlashArray X NVMe

Compared 6% of the time

More Pure FlashArray X NVMe Competitors

Dell PowerStore vs Dell Unity XT

Compared 33% of the time

NetApp AFF vs Dell Unity XT

Compared 11% of the time

HPE Alletra Storage vs Dell Unity XT

Compared 6% of the time

Pure Storage FlashArray vs Dell Unity XT

Compared 6% of the time

NetApp FAS Series vs Dell Unity XT

Compared 6% of the time

More Dell Unity XT Competitors

Dell PowerMax vs IBM FlashSystem 9100 NVMe

Compared 31% of the time

Dell PowerStore vs IBM FlashSystem 9100 NVMe

Compared 29% of the time

Hitachi Virtual Storage Platform vs IBM FlashSystem 9100 NVMe

Compared 27% of the time

Hitachi VSP E Series vs IBM FlashSystem 9100 NVMe

Compared 13% of the time

More IBM FlashSystem 9100 NVMe Competitors

Product Reports

Buyer's Guide

Pure FlashArray X NVMe

October 2025

Download Pure FlashArray X NVMe product report

Buyer's Guide

Dell Unity XT

November 2025

Download Dell Unity XT product report

Buyer's Guide

IBM FlashSystem 9100 NVMe

October 2025

Download IBM FlashSystem 9100 NVMe product report

Also Known As

Pure FlashArray//X NVMe, Pure FlashArray//X, FlashArray//X

EMC Unity, Dell EMC Unity

IBM FlashSystem 9100, FlashSystem 9100

Overview

Pure Storage FlashArray//X is the world’s first enterprise-class, all-NVMe flash storage array. It represents a new class of storage – shared accelerated storage, which is a term coined by Gartner – that delivers major breakthroughs in performance, simplicity, and consolidation.

Pure Storage

Dell EMC Unity XT is one of the best all-flash storage arrays on the market today. Dell EMC Unity XT arrays are designed for performance, optimized for efficiency, and built for a multi-cloud world. In addition, they support digital transformation, enabling businesses to reach the full potential of their data capital quickly and easily. Dell EMC Unity’s All-Flash and Hybrid Flash storage platforms provide the performance, efficiency, enterprise-class software, and virtualization integrations required for running a wide range of virtualized applications.

Dell EMC Unity XT Features

Dell EMC Unity XT has many valuable key features, including:

Unified storage flexibility: With Dell EMC Unity XT you can consolidate separate storage platforms into a single Unity XT unified storage system via a simple and intuitive (HTML5) management GUI that also connects you to CloudIQ.
All-inclusive data protection: Dell EMC Unity XT offers a reliable way to protect application data with all-inclusive data protection services, including snapshots, data-at-rest drive encryption, replication, thin clones, and dynamic pools.
Software-defined solutions: Dell EMC Unity XT provides software-defined storage and HA for on-prem and in the cloud solutions.
Multi-cloud alignment: With Dell EMC Unity XT you have the ability to build and manage an effective data-first multi-cloud strategy. It allows you to consolidate public and private cloud resources that align with your business goals.
Metro node: This feature enables automated business continuity with zero RPO and RTO. It also provides greater flexibility through multi-platform support and replication to any array and has zero performance impact on the storage array.
Scalable file system: Dell EMC Unity XT is built with a robust 256TBu file system. The UFS64 file system includes up to 256 independent VMDK clones, 16 thin clones, space efficient snapshots with a simple space reclaim and low IO impact, file system shrink that can reclaim free blocks, simplified Quotas for User, and much more.
DevOps integrations: Dell EMC Unity XT supports the Container Storage Interface (CSI) plugin to run Kubernetes workloads.

Dell EMC Unity XT Benefits

Some of the benefits of using Dell EMC Unity XT include:

High-speed data access
Low latency
Dual-active controller architecture
Multi-cloud
Intuitive user interface
Cost efficient
Solid performance

Reviews from Real Users

Below are some reviews and helpful feedback written by Dell EMC Unity XT users.

A Systems Engineering Manager at a manufacturing company says, "It is definitely one of the most robust, solid, well-performing products that I have dealt with. It is set it and forget it, which is pretty amazing." He also mentions, “We can do both block and file storage on one unit without purchasing a separate device.”

Peter S., Senior Technical Specialist at a healthcare company, states, “The most valuable feature is reliability. At the end of the day, it just runs. This solution is easy to work with and easy to maintain.”

PeerSpot user Melvin T., Senior Systems Engineer at Prosperity Bank, explains that the solution is “easy to use and we can add LUNs or space without interruption to end-users. We're able to access it from just about anywhere, as long as we have access to a browser. That feature is really neat because sometimes we will go to a different data center or a different site, and if we need to access it to see a LUN or to see any type of storage, we can do that. That's one of the big takeaways with Unity."

Dell Technologies

IBM FlashSystem 9100 combines the performance of flash and Non-Volatile Memory Express (NVMe) end-to-end with the reliability and innovation of IBM FlashCore technology and the rich features of IBM Spectrum Virtualize - all in a powerful 2U enterprise-class storage system. Providing intensive data driven multicloud storage capacity, FlashSystem 9100 is deeply integrated with the software defined capabilities of IBM Spectrum Storage allowing you to easily add in the multicloud solutions that best support your business.

IBM

Sample Customers

Fremont Bank, Judson ISD, The Nielsen Company

Draper, Rio Grande Pacific, Royal Victoria Regional Health Centre

Information Not Available

Buyer's Guide

Dell Unity XT vs. IBM FlashSystem 9100 NVMe

September 2025

Free Report: Dell Unity XT vs. IBM FlashSystem 9100 NVMe

Find out what your peers are saying about Dell Unity XT vs. IBM FlashSystem 9100 NVMe and other solutions. Updated: September 2025.

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