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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
194
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 April 2025, in the All-Flash Storage category, the mindshare of Pure FlashArray X NVMe is 0.8%, down from 0.9% compared to the previous year. The mindshare of Dell Unity XT is 7.8%, down from 10.1% 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

"Pure FlashArray X NVMe has low latency and high Ops. It is an evergreen model."
"The most valuable features of this solution are its ease of use and performance."
"Offers excellent features like efficient data reduction, a reliable SafeMode, and a great support model for continuous assistance and updates."
"The system allows for seamless learning experiences, facilitating quick and easy cloning of environments within minutes."
"We are satisfied with the performance as it is significantly faster compared to traditional storage options."
"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."
"The high availability of the product is the most valuable feature."
"Technical support has been helpful and responsive."
"It is easy to manage. A lot of the system manages itself."
"Snapshots provide a unique feature for testing and make management more comfortable and easy."
"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 pretty stable. I like the stability, because everything works like it should. We made it all redundant. So, we don't have anything to worry about."
"The scalability is really good now that they have the Dynamic Pools. We don't always have the money to buy complete write sets when we have to expand the storage, so now with the Dynamic Pools we can add disks on the go."
"I like the easy management with the new Unisphere management and the HTML5 interface."
"Inline data reduction is pretty impressive."
"The most valuable feature is the ability to provision storage from the CLI, versus having to go in and use the GUI every time. I can just script it out and it will create what I need. That makes it super-easy to manage. Also, for us, it's a set-and-forget. Once we provisioned it out, we haven't had to mess with it."
"I'm from Germany, so we have lots of metro clusters. The ability to have two sides that are redundant across hundreds or thousands of kilometers is critical for our customers. We have several hundred customers with metro cluster systems, so that is one of the best features."
"Performance is excellent. In fact, it's so fast that we're not really even taxing it all that much."
"AFF works well for VMware storage."
"The NVMe flash cache is the most useful feature. It lowers transactional speed even more."
"The most valuable feature is the support. If we have any issues, we can call into NetApp and their support is really good."
"NetApp is like a one-point central management. For example, one can put everything on the right version and control the whole environment from one software solution."
"Setup was simple and easy."
"We reduced our floor space by reducing 44 racks units to four rack units. It has helped us with our data center economies of scale. It reduces our support costs too, which is great."
 

Cons

"Managing data isn't difficult for me. The performance is usually perfect, but we sometimes have capacity problems."
"It is on the expensive side."
"I'd like to see the product implement active replication for vehicles such as VMware."
"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."
"In the next release, I would like to see real-time analytics for further insight into consumption models."
"Maybe the price can be reduced since the solution is very expensive."
"The tool's portfolio is minimal. It is expensive."
"I would like to see replication and DR features in the next release of this solution."
"Dell could improve Unity XT by adding support for NVMe."
"In terms of what could be improved, I would say its capacity and its connection."
"Since Dell took over EMC, the support has been very bad. Before, the support was fine. Now, the support is slow or they don't react."
"There's always room for improvement with the UI. That can be a little cumbersome at times."
"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."
"There are features still to come, like compression and deduplication on hybrid platforms, VDM improvements to be developed for NAS environments, and also improvements in the “self-migration” tools to push or pool information (to assist the migrations to and mostly from third-party arrays)."
"Dell EMC's competitor has a clustering technology. In the next release, it would be nice if they could build that into the product."
"I would like to see more compression and deduplication added to the solution. Today, our compression is about 2:1 and other solutions give us about 4:1 or 5:1."
"One of the features that I am looking for, which is already in the works, is to be able to take my code and automatically move it to the cloud."
"We had a lot of issues with two-factor authentication using, for example, Okta."
"We'd like to see them implement more subscription services into the base support model."
"In terms of what needs improvement, I would like to see more consistency with the UI. It seems to change every few versions. The menus can be in a completely different place."
"The initial setup was a little complex, because we weren't very knowledgeable in the NetApp at the time. We were using a third-party, and they didn't have a lot of technical individuals, so it took a while to get it out."
"The scaling needs improvement. NetApp is limited for scaling options."
"We currently use some thin provisioning for our planning system, but we will probably move away from thin provisioning because our Solaris planning system actually has some issues with the thin provisioning and way Solaris handles it, since Solaris uses a ZFS file system. The ZFS file system doesn't like the thin provisioning changing things and it brings systems down, which is bad."
"I've had a few cases where support wasn't able to answer the question or they took quite a while."
 

Pricing and Cost Advice

"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."
"We pay approximately $50,000 USD per year in licensing fees."
"Pure FlashArray X NVMe’s pricing is cheaper than other products."
"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 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."
"With VMware, we pay $300,000 annually."
"The product is expensive."
"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."
"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."
"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."
"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."
"Just from an overall power and heating usage, it costs substantially less than some of our existing solutions"
"There is an annual charge for the license of this product. It has better pricing than its competitor: Pure Storage."
"The solution is very expensive."
"While Dell EMC is costly, I don't have any complaints about their licensing model."
"There is no capacity license for XT and no additional costs for expansions. I would rate its pricing as four out of five."
"It definitely reduces costs because it simply takes less power to run these systems. While the SSDs don't take power, they are in general very big right now. So, the running cost has decreased for a lot of our customers."
"With other options, you need to buy a couple of different products to achieve the same outcome."
"It is relatively cheap compared to other vendors."
"Our TCO has increased by 15 to 18 percent."
"Our total cost of ownership (TCO) has decreased by 40 percent."
"NetApp is getting too expensive."
"You need to be careful with the licensing since it can become expensive."
"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."
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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
11%
Government
6%
Educational Organization
72%
Computer Software Company
5%
Manufacturing Company
3%
Government
2%
Educational Organization
71%
Computer Software Company
5%
Manufacturing Company
5%
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: March 2025.
845,040 professionals have used our research since 2012.