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Dell Unity XT vs IBM FlashSystem 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
IBM FlashSystem
Ranking in All-Flash Storage
12th
Average Rating
8.2
Reviews Sentiment
7.0
Number of Reviews
111
Ranking in other categories
NAS (4th), Modular SAN (Storage Area Network) (3rd)
 

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 IBM FlashSystem is 6.6%, down from 6.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
All-Flash Storage
 

Q&A Highlights

Miriam Tover - PeerSpot reviewer
Aug 24, 2021
 

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.
Raanan Sitton - PeerSpot reviewer
Offers cost-effective storage for small companies with budget constraints
IBM FlashSystem 5300 is offered at a very low cost in Israel, which is advantageous for small companies. However, other features like deduplication and compression do not perform effectively. The price sensitivity makes it a viable option for clients with budgetary constraints, as it allows us to secure deals based on the cost rather than advanced performance.

Quotes from Members

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

Pros

"The standout features for us in Pure FlashArray X NVMe are its robust DDoS protection, seamless transparent failover, and failback capabilities ensuring high availability."
"The initial setup was extremely simple and straightforward."
"Technical support has been helpful and responsive."
"It offers competitive performance, and the Evergreen storage model of Pure fits well with my organization."
"The most valuable feature of this solution is its ease of use."
"I use the tool for Oracle databases, Oracle virtual machines, and Oracle Linux databases. I'm on the storage side, not a database administrator."
"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."
"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 Snapshot feature is key."
"We can put all the virtualized servers in one place, so our customers can share and manage the devices very easily."
"The NAS capability is mainly what we're looking for from this product, and being able to recover fast in DR."
"It's very reliable. I have not had an issue with Dell EMC Unity."
"It is a workhorse and will run even demanding workloads."
"Real Unified Storage (Block, File, VVols) in a unique 2U hardware."
"It's easy to handle for administrators and it's a unified system. It's not as complex as Celerra systems or CX4 Clariions to administrate. You can do everything with one GUI."
"Provides good provisioning, allowing us to save space."
"The initial setup was really straightforward. It was not complex. Deployment took one month, due to the data migration duration."
"I would recommend it to other users."
"The storage system is one of the best in the world."
"The performance is very good and we use this product to enhance our core system."
"The pricing is reasonable."
"The most valuable feature is that is supports a high IOPS rate."
"Flash disk with Easy Tier option"
"Ability to manage third-party arrays and virtualise them: One screen to control multiple arrays. Simplified administration."
 

Cons

"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."
"It is on the expensive side."
"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."
"I would like to see some AI features that would allow arrays to intelligently identify threats or unusual behavior in the data pattern and give an alert."
"They could add more support for file storage and different types of storage."
"I would like to see replication and DR features in the next release of this solution."
"There is room for improvement in the pricing of the product."
"Efficiency improvements would always be welcome, but I'm not sure if they could get more efficient."
"Thick provisioning of LUNs."
"Currently, the protocol SNMP is not implemented. That's a problem, as we follow this protocol and I can't check the integrity of this equipment."
"I would like better monitoring capabilities: more historical data with more insight into the performance for the database. We now use a separate tool for it. Therefore, it would be nice if we could have that straight from the tool."
"It's an expensive solution, particularly for medium companies. One device costs about 30,000 euros. The support contract is quite expensive as well. We are currently looking for other lower-cost solutions."
"The solution can use improvement with the patch cluster like the Synchron and Active replication."
"There is no de-duplication. Unity used to be Bionics, which had de-duplication; however, in Dell Unity XT, the de-duplication was deprecated and is no longer available."
"Dell Unity XT’s price needs improvement."
"In some countries, spare part availability is an issue for us."
"The customer's expectations are what they get on the cloud, they're expecting even in the on-premises deployments, going forward."
"IBM FlashSystems is lagging in optimizing storage technologies."
"The solution's infrastructure technology level could be PCI Express 5 instead of PCI Express 4 for the next version."
"The GUI needs some improvement. An additional function that could be helpful is reducing the time it takes to delete volumes, especially if they are compressed or deduplicated."
"This solution could be improved by offering greater amounts of storage."
"I know they have a flashcopy manager, but it is extra software, an additional license, and some customers don't like to add addition costs to their infrastructure. If IBM could create, or include snapshot management within the GUI, that would really be helpful."
"The deduplication technology in IBM FlashSystem needs significant improvement."
"This solution needs a management console where we are alerted to issues and can report them, or escalate them through email or another method."
 

Pricing and Cost Advice

"Pure FlashArray X NVMe’s pricing is cheaper than other products."
"With VMware, we pay $300,000 annually."
"Our licensing fees are $500,000+ USD."
"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."
"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."
"Given its price, Pure is not the first option."
"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."
"The product is expensive."
"The price of Dell Unity XT is reasonable. However, if you are buying a custom solution, it can come at a considerable price."
"The only improvement would be a lower cost per unit/disks, however on the whole we are very pleased with this product."
"The support you're getting with it is probably an underestimated value that comes with the box you're buying."
"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."
"We checked both HP and Dell and we determined that Dell EMC was a better option."
"It scales, but then you have to buy additional stuff."
"One of the most valuable features is its cost. It was inexpensive compared to other arrays that we were looking at."
"The solution is very expensive."
"The pricing is competitive in our country."
"It pays to go back and get the best price you can from your supplier. The first offer is not always at the best discount."
"Pricing can be considered as per market competition."
"The cost of the IBM FlashSystem is lower than the HPE solution."
"My customers got the IBM FlashSystem bundle offer. It was a one-time purchase for three years of service. The price would depend on the storage size and could reach between $25,000 to $55,000."
"I find the pricing of the solution to be very reasonable."
"Regarding licensing make sure you add at least three years software maintenance from IBM at the beginning, because you will not be able to download firmware updates or any fixes/patches without this."
"The price depends of the technology that our customers need. The price can come at a lower cost but this may increase as storage is added."
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Answers from the Community

Miriam Tover - PeerSpot reviewer
Aug 24, 2021
Aug 24, 2021
EMC's Unity is not comparable to the performance of an IBM FlashSystem option, but it is fairly close in performance profile to the just released Storewize V5100 model 424. If you provide the initial amount of storage you are going to purchase and your expected capacity growth rate, plus any workoad/performance info you have on hand, and we will give you a very quick TCO and performance compar...
2 out of 5 answers
IB
Apr 17, 2019
For a performance comparison, I use a vendor-neutral benchmark portal like Storage Performance Council: For SPC-1: a) IBM storage, including All-Flash (performance) https://spcresults.org/benchmarks/results/top10/performance/spc1/1?field_peer_review_status_target_id=48&field_sponsor_target_id=18 b) Overall top 10 SPC-1 (performance) https://spcresults.org/benchmarks/results/top10/performance/spc1/1?field_peer_review_status_target_id=48&field_sponsor_target_id=18 c) Overall top 10 SPC-1 (price/performance) https://spcresults.org/benchmarks/results/top10/price/spc1/3 For SPC-2: a) Overall top 10 SPC-2 (performance) https://spcresults.org/benchmarks/results/top10/performance/spc2/1 b) Overall top 10 SPC-2 (price/performance) https://spcresults.org/benchmarks/results/top10/price/spc2/1 I also look at specific benchmarks from the vendors: a) IBM https://www.ibm.com/developerworks/community/blogs/InsideSystemStorage/entry/spc_benchmarks_for_disk_system?lang=en b) Dell EMC https://www.dellemc.com/resources/en-us/asset/white-papers/products/storage/h15161-dell_emc_unity-performance_metrics.pdf
it_user1000854 - PeerSpot reviewer
Apr 17, 2019
I am about to take delivery of a Unity 400 with SAS and have never considered an IBM hardware so i am not able to compare based on experience.
 

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%
Computer Software Company
14%
Financial Services Firm
11%
Manufacturing Company
9%
Government
7%
 

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 your experience regarding pricing and costs for IBM FlashSystem?
Many factors affect purchasing directly from IBM, often involving a multi-step process. Customers, especially in bank...
What needs improvement with IBM FlashSystem?
The GUI needs some improvement. An additional function that could be helpful is reducing the time it takes to delete ...
 

Also Known As

Pure FlashArray//X NVMe, Pure FlashArray//X, FlashArray//X
EMC Unity, Dell EMC Unity
IBM Storwize
 

Overview

 

Sample Customers

Fremont Bank, Judson ISD, The Nielsen Company
Draper, Rio Grande Pacific, Royal Victoria Regional Health Centre
Celero, Friedhelm Loh Group, Clarks, Mingkang Natregro Health Food Group, Sofia, Etisalat Fights Fraud, UF Health Shands Hospital, Generali, Elecon Engineering Company Limited, Ventiv , Technology, CPFL Energia, Royal Caribbean Cruises Ltd., SciQuest, Coca-Cola Bottling Co. Consolidated, Paddy Power, Kelsey-Seybold Clinic, Interconnect Services, Severstal IP-Only AB, PVU Group GmbH
Find out what your peers are saying about Dell Unity XT vs. IBM FlashSystem and other solutions. Updated: April 2025.
850,671 professionals have used our research since 2012.