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Dell Unity XT vs NetApp AFF comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Sep 18, 2024

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
Sponsored
Ranking in All-Flash Storage
15th
Average Rating
9.0
Reviews Sentiment
7.6
Number of Reviews
35
Ranking in other categories
NVMe All-Flash Storage Arrays (6th)
Dell Unity XT
Ranking in All-Flash Storage
4th
Average Rating
8.4
Reviews Sentiment
7.1
Number of Reviews
196
Ranking in other categories
No ranking in other categories
NetApp AFF
Ranking in All-Flash Storage
2nd
Average Rating
9.0
Reviews Sentiment
7.6
Number of Reviews
311
Ranking in other categories
NVMe All-Flash Storage Arrays (2nd)
 

Mindshare comparison

As of May 2025, in the All-Flash Storage category, the mindshare of Pure FlashArray X NVMe is 0.8%, down from 0.8% compared to the previous year. The mindshare of Dell Unity XT is 7.3%, down from 10.2% compared to the previous year. The mindshare of NetApp AFF is 9.3%, down from 9.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
All-Flash Storage
 

Q&A Highlights

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Nov 03, 2020
 

Featured Reviews

Eugene Hemphill - PeerSpot reviewer
Helps to save money and resources with the data compression feature
One point I'd like to improve is that the tool should start selling small boxes again. It discontinued some products and is focusing on bigger, more capable boxes, neglecting the SMB market. Even though it's not a big market, it shouldn't have removed them. One way to improve the product is to add an operational assistant that doesn't depend on VMware. It could also establish more alliances with other operational systems.
Syed Habib - PeerSpot reviewer
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.
Anna Sofo - PeerSpot reviewer
Since switching, our clients have reported improved performance and reduced latency
I like NetApp AFF's deduplication. The solution's AutoSupport feature is efficient and effective because customers are notified of potential issues before they experience problems with NetApp. The support is sold based on metro clusters, so they guarantee the client's business continuity. NetApp has an Active IQ app that allows you to get information on your smartphone.

Quotes from Members

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

Pros

"We're able to get higher-density workloads on the same infrastructure, and we have a smaller physical footprint. The performance is excellent – during our test the bottlenecks are never on the X array, it just keeps picking up the pace to match what you need. The real-time visibility is a differentiator in my opinion."
"Offers excellent features like efficient data reduction, a reliable SafeMode, and a great support model for continuous assistance and updates."
"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."
"I appreciate the performance."
"We are satisfied with the performance as it is significantly faster compared to traditional storage options."
"FlashArray has some fresh efficiency features. I've never seen a storage solution with a compression rating this high before. It's at least 4-to-1 on Oracle databases. It's the best flash storage for Oracle."
"The Pure1 component is most valuable at this point in time when comparing it with EMC. Pure1 is where you can have your diagnostics in the cloud, so you can look at things from your mobile phone."
"Overall stability is very good. It is a very stable solution."
"The most valuable aspects of this solution are its stability, performance, and ease of updating."
"I like the ease of configuration, the quick setup and the fact that it seems to be hardened. We haven't had any issues with them. In terms of simplicity of ownership, once they're running you don't have to touch them. They're also simple to manage. We came from the VNXe 3200s so it's very similar."
"Purchasing; We worked with a sales rep to purchase our Unity."
"When I have an issue and need technical support, I reach out to them either through chat or by submitting a service request, and the response is good."
"For our customers, it's the simplicity of it. They find it easy to use, along with the added features, the dynamic volumes."
"Dell Unity XT is user-friendly and easy to use."
"I have found Dell EMC Unity XT to be stable."
"It's the simplicity part of it. It's the ease of management, it's the call home, the CloudIQ functionality. It's all built in. I think Dell EMC has put a lot of thought into it."
"Performance. Mostly with our default settings it's good. All of the factory settings are fine. We don't have to tune it."
"If the data is deduplicated, we'll hopefully begin to save space."
"It is easy to manage data through the GUI by using Active IQ and the unified manager."
"The speed, inline deduplication, and compression are really nice. It's also just easy to manage. We use Snapshot and SnapMirror offsite, which give us some good recovery options."
"We had some customers who were running virtualization workloads on classical spinning disks. We implemented an AFF system, and they got a huge performance boost out of it because the latency of the SSDs is simply much lower. Actually, most customers benefit from the improved latency and performance from the AFF systems."
"The overall latency in our environment is very low because it's All Flash and we've got 10 Giga dedicated to the storage network"
"The features that I found most valuable are SnapMirror and SnapVault; these provide DR and backup for data redundancy."
"The business copy solution has become faster using SnapMirror."
 

Cons

"The UI for this solution needs to be improved."
"There is room for improvement in catering to midrange storage needs, especially for customers seeking Enterprise-class features."
"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."
"The tool's portfolio is minimal. It is expensive."
"In terms of what needs improvement, the dashboard and management could be simplified."
"We have run into a couple of instances recently where we are running out of space. So we have had to buy some more packs for it and they have deployed fine and it has increased smoothly."
"They could add more support for file storage and different types of storage."
"Maybe the price can be reduced since the solution is very expensive."
"We have had some downtime. Nothing is perfect. Unity’s have had some code-release problems, versions that, from a compatibility perspective, had some glitches which caused an outage. But, given the amount of Unity’s we run, that has been fairly minor and it hasn't happened at scale or across all of our Unity’s."
"Our request to Dell EMC for improvement was in the reporting and monitoring areas. Dell EMC built up a cloud ID so that we could see the overall storage numbers. We needed to have the proper KPIs to be able to see and manage things."
"Last (and I understand that it has a low chance of being implemented) the copy services currently are redirect on write. It would be great if the administrator could choose between redirect on write and copy on write, when configuring copy job."
"I rate the scalability of Dell Unity XT a nine out of ten."
"The solution should include a free process in the HPE portal that uses serial numbers to verify that hardware is genuine."
"It should be lighter. It takes up a ton of rack space. It would be nice to have a smaller footprint."
"This is a tier-three solution and it gives us what we need for archiving and backups."
"It's very frustrating that it's not backward-compatible with the previous platforms, so it's a struggle for a lot of our customers."
"NetApp can help in these endeavours by focusing more on security."
"I do not like the NetApp GUI. For example, the GUI of ONTAP Command Manager could be better, but the CLI is perfect."
"The procurement process could be improved. It takes a long time for us to receive stuff. The product is good. It's not the product, it's just that it takes forever to get it. It's not our reseller's problem; it's usually held up at NetApp."
"The size of NetApp could be better. They're always about 40 pounds without the hard drives in them, so it would be great if there's a way to make them smaller yet keep the functionality. That would reduce the physical footprint."
"AFF could introduce different subscriptions on the platform."
"Going forward, I would like improvement in the response latencies, capacity size, cache, and controller size."
"I do not like the NetApp GUI. For example, the GUI of ONTAP Command Manager could be better, but the CLI is perfect. With every new version and upgrade, they change things, which makes it messy, and I am not good at working with that."
"It's a little behind on security. It's starting to get into multi-factor authentication, they just started to introduce it but not for all products."
 

Pricing and Cost Advice

"The product is expensive."
"The licensing is on a yearly basis."
"Given its price, Pure is not the first option."
"Pure FlashArray X NVMe’s pricing is cheaper than other products."
"Its price could be better. It is not too expensive, but it is the high-end cost. It is kind of a Rolls-Royce. You pay a lot, but you get a lot out of it. So, the price pressure on the way down would be great, but at the end of the day, if you need to do the work, you just pay for it."
"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."
"The tool's pricing is cheap; I rate it a six to seven out of ten. Most of our sales are not subscription-based. We sell the hardware, and customers keep using it. They only renew the service part annually. The support can be a bit pricey, but the solution is more cost-effective than anything else out there."
"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."
"Licensing is a little bit confusing. Going through everything with them, there are a lot of line items to go over. Every single thing is broken down into a line item, and it starts to get really confusing in terms of what we're actually purchasing when it comes to the product."
"The pricing of Dell Unity XT is good."
"The solution’s pricing is competitive."
"The price of Dell Unity XT could improve. However, it is a one-time purchase."
"The price of the solution should be less expensive. However, at some point, you need to pay for facility and performance."
"While it has a good price to start, they could always make it cheaper."
"As far as licensing goes, I love how VMware works with Dell EMC Unity. It's great. They work hand in hand. They have made it so simple."
"The price of NetApp is very expensive, but we don't know how much Pure is, so we can't compare."
"The only area where the product has room for improvement is the cost."
"I would like the pricing to be cheaper."
"Once we did get into the NetApp ecosystem, we realized that the cost effectiveness was greater than we originally thought."
"It is relatively cheap compared to other vendors."
"We don't like the cost. We would like to buy more."
"NetApps offers a lot of different options. Just take your time and work with the consulting teams. Lay out what your needs are to ensure you are purchasing what will help you be successful."
"I am comfortable with the pricing, which is fair compared to others."
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Comparison Review

it_user186357 - PeerSpot reviewer
Jan 28, 2015
NetApp vs. XtremIO
Is there another storage platform as feature rich as NetApp FAS? I think it is fair to say that NetApp FAS running Clustered Data ONTAP is a very feature rich platform – the move to the clustered version of ONTAP has brought many next-generation features including Scale-out and Non-disruptive…
 

Answers from the Community

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Nov 3, 2020
Nov 3, 2020
I saw that you have doubts about what you chose. I have a lot of experience with the constructor, honestly I can recommend Dell EMC Unity XT All-flash which can guarantee you a ratio of 3:1 signed by Dell and you have to deploy all types of workload from block to file. You can also rely on the native cash and fast cache functionality for increasing application performance
2 out of 8 answers
CC
Dec 2, 2019
First of all the decision should be taken looking at similar products in terms of capacity and performance. I will show a few aspects helping the decision, comparing Unity Xt480f and AFF220 (both chosen by distributor to be in the price range for capacity): 1. Comparing 2 systems with the same capacity and performance: pricing is the first to look at: 1a. Cost per GB, war capacity and usable capacity (+Unity) 1b. Cost of adding capacity (+Unity) 1c. Cost of licensing per GB / per added capacity (+Unity all included) 1d. Cost of maintenance after initial contract (+Unity same for all life ) 2. Comparison of CPU/MEM, we choose Unity XT because of better CPU cores/frequency and memory per controller 3. Percentage of space lost in various configurations. Our goal was to use Dynamic disk pools, available on Unity. Easier upgrades/downgrades. 4. If virtual volumes are considered, Unity has a VASA provider included in the controller, Netapp is using external VM. 5. Product lifecycle 6. Inline compression / deduplication, performance, From the above 1=80%, 2=5%, 3=10%, 4+5=5% We went to Unity XT480 where on the same budget we got 20% more usable flash capacity, while enough slots remain for future upgrades.
MG
Dec 2, 2019
EMC definitely.
 

Top Industries

By visitors reading reviews
Computer Software Company
15%
Financial Services Firm
11%
Manufacturing Company
11%
Government
6%
Educational Organization
67%
Computer Software Company
6%
Manufacturing Company
4%
Government
3%
Educational Organization
69%
Computer Software Company
6%
Manufacturing Company
6%
Financial Services Firm
3%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
 

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.
What needs improvement with Pure FlashArray X NVMe?
Adding some functions to the product would be beneficial. Storage replication should be essential, and the analytics ...
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...
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...
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...
What is the Biggest Difference Between Dell EMC Unity and NetApp AFF?
Well, Is one thing NetApp Storage has vs other brand is the mix of protocol CIFS with NFS booth working together in t...
What is the Biggest Difference Between Dell EMC Unity and NetApp AFF?
This question is very dependent on your requirements. Both are among the best in the field. Of course, the intended c...
What is the Biggest Difference Between Dell EMC Unity and NetApp AFF?
The answer depends on your needs and budget. If you want high performance (who doesn't) or let's say the latency matt...
 

Also Known As

Pure FlashArray//X NVMe, Pure FlashArray//X, FlashArray//X
EMC Unity, Dell EMC Unity
NetApp All Flash FAS, NetApp AFF, NetApp Flash FAS
 

Overview

 

Sample Customers

Fremont Bank, Judson ISD, The Nielsen Company
Draper, Rio Grande Pacific, Royal Victoria Regional Health Centre
DreamWorks Animation, FICO, Yahoo! Japan
Find out what your peers are saying about Dell Unity XT vs. NetApp AFF and other solutions. Updated: April 2025.
849,686 professionals have used our research since 2012.