Try our new research platform with insights from 80,000+ expert users

Dell Unity XT vs NetApp AFF comparison

Sponsored
 

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
14th
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
6th
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
312
Ranking in other categories
NVMe All-Flash Storage Arrays (2nd)
 

Mindshare comparison

As of July 2025, in the All-Flash Storage category, the mindshare of Pure FlashArray X NVMe is 0.8%, up from 0.8% compared to the previous year. The mindshare of Dell Unity XT is 6.7%, down from 10.2% compared to the previous year. The mindshare of NetApp AFF is 9.4%, down from 9.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
All-Flash Storage
 

Q&A Highlights

AD
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.
Ian Rousom - PeerSpot reviewer
Flexible with great support and high-speed multi-protocol storage
Keystone offers flexible consumption models that go beyond just how much capacity at such and such a speed, et cetera. We don't always know what the profile of that data will be. However, if we can quickly agree on terms that meet our needs and make NetApp still reasonably profitable, we can confidently deploy, see how things go and adjust. That kind of service delivery model, that customer service model has sped things up and made contract negotiations much easier. It frankly made the owners of the system more confident. We've experienced faster time to market. It's hard for us to find and retain infrastructure staff. We're in a business where the firm fixed price contract reigns supreme, and so we can't always just offer someone more money. However, if they can dedicate their time to learning one company's portfolio and learning it really well, but be useful in a bunch of different places, they will do well. We've seen that in a lot of different places. We've been able to hire younger people and retain them, moving them from program to program based on their understanding of the solution its skill set, and its portability. It's been useful for high-speed multi-protocol storage in places with ever-increasing density. We have limits on how much power and cooling and rack space we have, and yet they've delivered every time. We needed a storage company that had mastery of multi-protocol, and this solution stands out. They especially stand out as a secure provider. We require solutions that we can run ourselves, that we can air gap since so much of what we do is either classified or very sensitive or cannot live in a public ecosystem. For us, the issue consuming AI has been the trust of the models given to us by third parties. We can't necessarily trust their provenance, what fed them, what originally trained them, or what gave them their worldview, for lack of a better term. We can't simply just trust that at face value since we know nothing about where it came from or what inferences it might make. We must assume that some AI inferences were made deliberately to damage or hurt national security systems. So the models that we start with tend to be very, very primitive, crude, and not well trained, so we have to train them much longer and not always with the availability of cloud that has inexhaustible capacity. A partner who understands this and provides consistency at all scales is very important.

Quotes from Members

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

Pros

"The solution is scalable."
"On a scale of one to ten, I rate Pure FlashArray as ten."
"Everything, especially the VMs inside, is pretty fast."
"Pure FlashArray X NVMe will quickly overcome all the hurdles you face, including network and latency issues."
"One of the best features is the support, which is excellent."
"It offers competitive performance, and the Evergreen storage model of Pure fits well with my organization."
"The most valuable feature of this solution is reliability."
"Pure Storage has signature security technology, which cannot be deleted, even if you are an administrator."
"This solution makes it easy to manage storage, provision new workloads, and scale-up."
"VMware integration: Grants both the Storage and Virtual Administrator the ability to create and mount datastores, or even to check how much space each VM is consuming."
"It does great deduplication. From a storage perspective, we save money being able to dedupe right on the disk"
"Key features are ease of use, ease of management, ease of deployment, and the GUI is very user-friendly."
"We were able to integrate it very quickly with other solutions."
"Its quick integration with VMware. The ability to stand up a data store in one place, where you don't have to go and rescan for the data store through the vCenter Client, as well as SMB shares. This ended up being a big selling point for us."
"The most valuable feature is the dynamic cache of this product. It is very important. We have the physical cache and we can boost this cache using disks. All the products are mainly flash now and this is one of the main characteristics which our customers like."
"They have a Unity REST API that I use to automate some of the storage stuff. I'm just getting started with it, but it seems pretty easy to use."
"Batch times went from approximately seven hours down to about two and a half. Functionality during the day, such as taking or removing snapshots and cloning instances, is higher than it has ever been."
"Our architecture has historically relied on RDMs, so AFF has enabled us to easily migrate from our old EMC PowerMax to the new NetApp. It's been pretty smooth. We have a lot of SAP servers in our environment, so performance is critical for us."
"Over the past 18 years, it has been extremely easy to upgrade to newer products and technology. We can upgrade as we move along. So, we have been able to keep up with the newest technology with zero downtime."
"All-flash storage has definitely delivered the most value to our organization. We have a large VDI deployment, and there is now no wait time when they are booting up. Everything is quick. Everything builds fast."
"The usability of actually being able to scale it out has been great."
"Scalability is excellent. If we need more space, it's a no downtime solution. It's harder to get the funding than it is to get the solution itself."
"It's helping to leverage data. The storage is being utilized to implement larger, complex file sizes."
"Its efficiency and scalability are the most valuable features."
 

Cons

"There is room for improvement in catering to midrange storage needs, especially for customers seeking Enterprise-class features."
"There is room for improvement in the pricing of the product."
"I would like to see replication and DR features in the next release of this solution."
"We would like to see more visibility into garbage collection and CPU performance in the GUI."
"The UI for this solution needs to be improved."
"They could add more support for file storage and different types of storage."
"In the next release, I would like to see real-time analytics for further insight into consumption models."
"There are some challenges with data encryption and reduction."
"We integrated it with vSphere but that integration was "iffy". It was okay but we had a few challenges with it."
"It could always use native replication. Then I could get rid of RecoverPoint."
"We noticed in the last release of code that there were some inefficiencies around getting our data efficiency up in terms of dedupe and compression."
"In terms of what could be improved, I would say the deduplication part, because for large deduplications, you need an extra appliance to do it in order to avoid having problems in performance. I think that could be improved, because everything should be included in the product, not with an appliance from the outside."
"We do a lot of VMware. It only integrates with VMware in one way, which is virtual volumes. I don't really have any visibility on anything else. From VMware, I can't look into Unity. From Unity, I can't look into VMware unless I am using virtual volumes, where they integrate together happily, but we are not using that. I would like better integration for non-virtual volume VMware use."
"Dell could improve Unity XT by adding support for NVMe."
"It would be great if the solution could integrate an NVMe disk."
"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."
"In the past, NetApp designed it so that you have a 70% threshold. You would never fill up past 70% since you need to have that room available. Whereas with Pure, I can fill it up to 110% of what they listed and it's still going at full speed. NetApp can't do that."
"When you look at the competitors, they have some features available, for example on the deduplication side.​"
"The only downside to NetApp AFF is its price."
"The dashboard needs improvement. The dashboard needs some uplift"
"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."
"During the initial setup, you need to know what you are doing."
"I would like to see aggregate level encryption in the next release. This is critical."
"We don't have any challenges with NetApp. We only need to update it on emerging software and versions that are put out or any enhancements that they've included or things that they've deprecated. NetApp's product is superior, so our engineers must stay on top of all the features and things that they've taken away."
 

Pricing and Cost Advice

"We pay approximately $50,000 USD per year in licensing fees."
"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."
"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."
"Pure FlashArray X NVMe’s pricing is cheaper than other products."
"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."
"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."
"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."
"The product is expensive."
"The pricing is reasonable. We're using the Flex on Demand pricing. It's really good for us when we pay for what we use. It made it easy to get it inside since it's an OpEx and instead of CapEx expense."
"Licensing is easy since all the software is included."
"The license is not required, but we must renew the support every year, every two years."
"The solution is very expensive."
"It's the performance combined with the gig-per-dollar value. That combination is superior to other storage options."
"The price of Dell EMC Unity XT is not reasonable. They should lower it because the trend is to move to the cloud. They have to protect their market by giving commercial or financial incentives."
"We bought extended warranties out of the box because our customer has a bad habit of managing warranties."
"At the end of the day, the licensing cost is key, because every customer has a pain point, that the cost of each piece is high. So if they would bundle everything in a package, that is how the competitors are selling their footprint."
"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."
"The price of the upgrading of the solution is high. I could buy a whole unit of All Flash FAS 300 with a shelf for around $285,000. Yet if I want to add one additional shelf, it'll cost me $275,000. So they want you to upgrade by replacing it. It's cheaper to buy a whole new unit than to just scale out. The upside is they last. AFF lasts us three or four years. So that's a good investment."
"With other options, you need to buy a couple of different products to achieve the same outcome."
"The licensing and pricing are fine. As a reseller for the product, we need to make the differentiation in the minds of the customer. They are not just buying some tool that does only one thing, e.g., showing a LAN for a customer. The pricing is fair for what it is."
"The price to performance ratio with NetApp is unmatched by any other vendor right now."
"We would like it to be free."
"Our total cost of ownership (TCO) has decreased by 40 percent."
"The only area where the product has room for improvement is the cost."
report
Use our free recommendation engine to learn which All-Flash Storage solutions are best for your needs.
860,168 professionals have used our research since 2012.
 

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
41%
Computer Software Company
11%
Manufacturing Company
7%
Government
4%
Educational Organization
33%
Computer Software Company
12%
Manufacturing Company
11%
Financial Services Firm
6%
 

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: June 2025.
860,168 professionals have used our research since 2012.