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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
5th
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

"The database workloads are pretty fast because I frequently move data from here to there."
"Technical support has been helpful and responsive."
"The most valuable features of Pure FlashArray X NVMe are its superior performance compared to other flash tiers, as well as its ease of use, with an intuitive user interface that is simple to deploy and use."
"The latency is good."
"It is very easy to install and configure. It has got excellent diagnostics. If you really need to see how the box is performing, the console gives you a lot of information. You can set thresholds as well as alerts based on the thresholds, which is a very powerful functionality. They are very proactive. They know how to monitor and manage the systems. They see a problem, and they are all over it before us. They see the problem before we see it, which is very good."
"Everything, especially the VMs inside, is pretty fast."
"Offers excellent features like efficient data reduction, a reliable SafeMode, and a great support model for continuous assistance and updates."
"It has good, reliable, fast storage."
"It is simple to use and easy to manage. We don't touch it after we set it up."
"Storage Snapshots have been really nice. They allow us to do backups without impacting our production workload that much. The scalability, the ability to add disks dynamically and adjust our workload as needed, has also been really helpful. That definitely makes my job easier. And the interface for managing Unity is very easy. The integrations between VMware Hypervisor and Dell EMC are top-notch, so it's been really easy to use and manage."
"Being all-flash makes everything super-fast. It's also great to manage. That's the easiest part. We also have another SAN, from Pure, and the Unity is easier to manage than the Pure."
"All-flash array eliminates all the overhead of tiering and a lot of the data structuring overhead involved."
"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."
"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."
"This solution makes it easy to manage storage, provision new workloads, and scale-up."
"Stable flash storage platform with good scalability, efficiency, and speed."
"The scale up version of it is the most valuable feature. You can go to 24 nodes, which is very cool."
"The mirroring of two different sites is great."
"Replication would be one of the most valuable features."
"Data efficiency is the most valuable feature because of the dedupe and compression."
"We have had issues before on our infrastructure where 20 to 30 percent of the people would come to us pointing the finger at the storage technology or storage back-end. That is now virtually zero."
"NetApp solutions are easy to maintain and upgrade."
"Multi-protocol is the most valuable feature for us. It does everything in one system: sifts, EBES, ISCSI, and fiber channel. Other systems don't do all that."
"If the data is deduplicated, we'll hopefully begin to save space."
 

Cons

"They could add more support for file storage and different types of storage."
"In terms of what needs improvement, the dashboard and management could be simplified."
"The tool's pricing is higher than competitors."
"We need better data deduplication."
"I want to see Pure Storage not only be for fast storage, but I want to see it be for the entire data center."
"The tool's portfolio is minimal. It is expensive."
"Adding some functions to the product would be beneficial."
"We would like to see more visibility into garbage collection and CPU performance in the GUI."
"It would be great if the solution could integrate an NVMe disk."
"The product’s pricing should be improved."
"I would like to see better compression, better dedupe. It's not nearly as good as what is built into the XtremIO. I understand why that is the case, but if they can take some of that technology and leverage that a little bit better in the Unity array, that would be great."
"The interface can be a little challenging for someone new."
"Inline dedup compression security is coming up as an issue, encryption, etc. is key for our customers. If we could have more ways to do software-based encryption, those are the features customers are asking us for, as well as replication."
"VNX used to have some features that Unity still doesn't have. From that perspective, the progress is not that advanced."
"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."
"We would like to see more advanced integration capability added to this solution."
"We don't have many issues related to the appliance itself. In terms of the OS, we do get some hiccups here and there."
"We have had trouble with restoring applications, and if there is more support for application-aware backups then that would be great."
"Migrating from a public cloud to on-prem or on-prem to a cloud can be a bit complicated. They have their own solution, but it should be easy to use."
"NetApp could focus even more on the configuration."
"The bad part about having scalability is the expense. It is currently extremely expensive, to be able to scale so fast on flash."
"The quality of technical support has dwindled over time and needs to be improved."
"A while ago, they performed quite slowly."
"I would like to see the ability to include more applications from applications to managed storage. If we can have more applications or more interface in more applications, that would be great."
 

Pricing and Cost Advice

"The licensing is on a yearly basis."
"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."
"We pay approximately $50,000 USD per year in licensing fees."
"Pure FlashArray X NVMe’s pricing is cheaper than other products."
"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."
"Given its price, Pure is not the first option."
"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."
"They can tout the functionality and cutting edge technology that they have, but that's where the price tag comes in. The cost is high, but I think as they grow their business and get more customers that it will probably go down a little bit."
"Currently, we buy directly from Dell EMC. We've tried going through resellers before, but we've found that if we go directly through Dell EMC, we get a good a price from being with the government."
"Pricing for this product is manageable, though slightly higher than comparable products."
"We purchased a five-year warranty."
"The solution is very expensive."
"The pricing is competitive. We miss some of the feature functionality that we had with the XtremeIOs but it's certainly suitable for the purpose."
"All the licenses are included from day one of your purchase of the product, so you don't have to buy licenses separately. There are no additional costs to be paid for the maintenance of the solution."
"Compared to other EMC platforms, Unity is nice because it is all-inclusive, in terms of the licensing model. That's unique for them, compared to other manufacturers. It is beneficial. We could use replication, native, right out-of-the-box."
"It is an average priced solution."
"If you go for Replication, Vault, and NAS, please ensure that the license has been ordered at the very beginning. However, licenses can been added or modified without rebooting the system at any time."
"With other options, you need to buy a couple of different products to achieve the same outcome."
"It is pretty expensive compared to other solutions. I would give it a seven or eight out of 10 in price (where 10 is expensive) compared to similar solutions."
"All features are included in the license, whereas with an EMC solution, you have to pay separately for extra terabytes."
"I looked at other vendors for other potential projects and thought NetApp's pricing was very competitive."
"I do not deal with pricing, but the pricing of NetApp and Dell seems pretty close. NetApp support is cheaper than Dell support."
"We benefited from implementing all-flash by reducing our data center footprint. We took it from 30 racks to just over five. This is one of the biggest savings for us."
"There is room for improvement when it comes to the cost. The cost is very high compared to other devices."
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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

AD
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
10%
Government
6%
Educational Organization
65%
Computer Software Company
7%
Manufacturing Company
4%
Government
3%
Educational Organization
67%
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.
850,671 professionals have used our research since 2012.