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IBM FlashSystem 9100 NVMe vs Nutanix Unified Storage (NUS) 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

Everpure FlashArray
Sponsored
Ranking in All-Flash Storage
4th
Average Rating
9.0
Reviews Sentiment
7.3
Number of Reviews
218
Ranking in other categories
No ranking in other categories
IBM FlashSystem 9100 NVMe
Ranking in All-Flash Storage
28th
Average Rating
8.6
Reviews Sentiment
7.5
Number of Reviews
22
Ranking in other categories
NVMe All-Flash Storage Arrays (13th)
Nutanix Unified Storage (NUS)
Ranking in All-Flash Storage
7th
Average Rating
8.8
Reviews Sentiment
7.2
Number of Reviews
119
Ranking in other categories
Software Defined Storage (SDS) (2nd), Public Cloud Storage Services (3rd), File and Object Storage (3rd), NVMe All-Flash Storage Arrays (4th)
 

Mindshare comparison

As of May 2026, in the All-Flash Storage category, the mindshare of Everpure FlashArray is 7.5%, up from 6.3% compared to the previous year. The mindshare of IBM FlashSystem 9100 NVMe is 0.9%, up from 0.5% compared to the previous year. The mindshare of Nutanix Unified Storage (NUS) is 1.4%, up from 0.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
All-Flash Storage Mindshare Distribution
ProductMindshare (%)
Everpure FlashArray7.5%
Nutanix Unified Storage (NUS)1.4%
IBM FlashSystem 9100 NVMe0.9%
Other90.2%
All-Flash Storage
 

Featured Reviews

Sowjanya MV - PeerSpot reviewer
Technical Lead at Wipro Limited
Has improved performance for mission-critical workloads and enabled seamless non-disruptive upgrades
The availability is 99.99%, which is the main factor any customer would need because their data should be available whenever they want to access it. This is one main critical thing. It is very easy to upgrade since Pure Storage FlashArray handles it well. Everything is non-disruptive now; previously, there were forklift shifts, but now that is not the case. Pure Storage FlashArray says no to forklift upgrades. Usually hardware requires downtime, but Pure Storage FlashArray has improved their footprint so that they are not asking for downtime; everything is just a non-disruptive activity, which is why customers are more inclined towards Pure Storage FlashArray. Customers want more of the models in their environment due to the performance they are giving, and everything is in one Pure1 Array console where we can view all the models on one page or just an orchestration tool. You don't miss anything; you have replication, notifications about replication, and details about which host groups replication is happening in and if that replication is successful or failed. On a daily basis, our purpose is to create volumes for infrastructure; our daily activities include creating volumes and mapping them to the host, doing any migrations from a VM, clearing the data stores, and carving the volumes to those VMs. One key factor is the data compression with a ratio of 5:1, focusing on space efficiency, inline deduplication, and the compression Pure Storage FlashArray works on; that is a major factor we can suggest to any customer. Analytical capabilities are crucial. Daily, we check the throughput and consumption, and Pure Storage FlashArray provides predictions for one year regarding usage. This prediction helps plan updates well ahead. For support, we just raise a case, and they follow up and get it done. There is also AI readiness, but with the model R2, we don't have much of that AI readiness. For others, we do have AI readiness that predicts capacity based on daily or monthly trends, enabling us to analyze how much space we need or if we need to expand the disk shelf. From an operational point of view, a good feature is that if you accidentally delete a volume, it will be retained in the destroyed state for the next twenty-four hours, which is not the same with any other vendor. I have worked in this storage domain for the past fifteen years, and this option is remarkable, benefiting any L1 or L2 engineer. Additionally, from a compliance perspective, Pure Storage FlashArray has REST APIs enabled. I have not explored automation much, but from a security standpoint, it is strong with encryption data. If you want to automate, you can easily integrate with all clouds and explore Pure Cloud for scheduling workloads, including volume creation. Customers find benefit in Pure Storage FlashArray's single management pane of glass due to the dual controller and active-active setup. If one of the controllers goes down, all workloads automatically shift to the other controller, ensuring their data is safe and accessible at all times. This is a highlighted feature that any customer desires because their data should always be accessible. For SAN workloads, we use Pure Storage FlashArray because for SAN FC fiber channel, we don't use it; we use NetApp for NAS activities. We have clearly split this, so SAN is for mission-critical applications, while network-attached storage handles file systems. This architecture helps us maximize the benefit from Pure Storage FlashArray due to the significant workloads from this giant retail client. From a footprint and energy consumption perspective, you can see energy consumption from the Pure1 storage portal on a daily basis, and it is very compact. The three models we use consume only three units, which is quite low. From a footprint and data center perspective, it doesn't occupy much space. As everything moves to cloud, there are requirements to avoid excess spending on data centers, and Pure Storage FlashArray is efficient in energy consumption and is environmentally friendly.
Yacine Bouakttaya - PeerSpot reviewer
Chief Technology Officer North Africa at Huawei
High-speed data processing has improved billing cycles but performance headroom still needs growth
In terms of improvement regarding IBM FlashSystem 9100 NVMe, I can compare with other competitors, especially regarding solution architecture. Data resiliency can be a concern because IBM can reach up to only four controllers, while others like Dell EMC can support up to eight controllers with better resiliency without service staff. Additionally, the SBC one benchmark is a storage performance console that stresses different storage solutions like Dell EMC and NetApp. It generates metrics of IOPS and latency, showing that the competition can have two million IOPS, significantly outperforming IBM's capabilities. As for the capability of scaling, we can see the limitations in reaching such high-performance levels.
Amarnath Charugundla - PeerSpot reviewer
System Engineer at Tata Consultancy
Unified management and cost-effectiveness lead to positive experiences and future savings
Improvement is necessary wherein the memory or storage should not breach 90%, because if breached, it becomes unmanageable. We have to set alerts or CPU triggering for 95% for the first warning. Other activities on nodes or file systems should be properly maintained. We must monitor the dashboard for P1, P2 alerts in the Nutanix Unified Storage (NUS) file share system including SMB, NFS, objects, and blocks. Attention should be maintained for any alerts such as CPU, memory, and RAM alerts, as exceeding these creates issues within teams. If triggered to 95% and forgotten, it crosses the SLA breach, causing disturbances to application, web, and platform teams. Continuous monitoring on the Nutanix dashboard is essential. Even a highly experienced person in Nutanix Unified Storage (NUS) cannot provide a 10 rating out of 10 because it is a vast system. I would rate it eight from my perspective.

Quotes from Members

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

Pros

"Lone segmentation is simpler and more agile. It's improved the velocity in overall provisioning from project to operation."
"Our storage phones home. It is smart and intelligent in that aspect, which has been huge for us. We don't have to be storage administrators."
"Their technical support is excellent. It's the best out of any of the vendors we work with."
"The most valuable feature is its data reduction."
"It is pretty much just plug and play. There is not that much to do with it. It is very easy to use."
"Data deduplication features make it easier to manage storage and forecast growth."
"Service and support is phenomenal."
"The tool has reduced our power consumption."
"IBM FlashSystem provides the same software on each box, including virtualized solutions."
"The most valuable features of IBM FlashSystem 9100 NVMe are its steady performance and usefulness in high-traffic environments."
"There are many valuable features of IBM FlashSystem 9100 NVMele I have found to meet my needs. Specifically, the maintenance cycle is a standout feature of this solution. The main component of the IBM FlashSystem 9100 NVMe is the maintenance of the batteries, which have a predetermined and reliable four-year life cycle. This is in stark contrast to other solutions that may use spinning disks, which can fail unexpectedly, causing unwanted downtime and maintenance. Having a predictable maintenance cycle is a significant advantage and has made this solution a preferred choice for me."
"The FlashCore modules support more value to the architecture due to their unique characteristics."
"You get value for money, because the product is good in terms of control failure."
"IBM FlashSystem 9100 NVMe is one of the leading storage systems in the world...I rate the solution's stability a ten out of ten."
"The technical support is good."
"Good performance with a user-friendly UI."
"Dell PowerVault serves entry-level storage needs for our customers who require that tier."
"Nutanix Unified Storage (NUS) can meet any storage need that a company has, such as traditional block storage for NFS or virtualization, and it can deliver a file solution for different kinds of needs of a company, and even objects for backup, for logs, for data lakes, for image repositories."
"The reliability and stability of Nutanix Unified Storage (NUS) is good, and the disaster recovery component is something impressive for this product."
"Nutanix support deserves a rating of nine out of ten."
"After working with other Nutanix solutions, I can say that everything has a purpose, and it is pretty bulletproof."
"The most valuable feature of Nutanix Unified Storage is the ease of setting up file shares. As a global company with data centers around the world, our files clusters are accessible globally. Managing and setting up shares for our over 12,000 employees is straightforward."
"The aspect of the product that I like the most is its simplicity."
"What I appreciate most about Nutanix Unified Storage (NUS) is its user-friendly nature."
 

Cons

"I would like to see some improvements on the FlashBlade side around the CIFS space support. I am not super familiar with all the different NAS protocols that they run on their box, but there could be some improvements made on SMB CIFS side."
"This product has only two active controllers, whereas other solutions can have more. This is something that needs to improve."
"If we suddenly dump large amounts of data onto the storage system, it takes a while to process it."
"Just some nit picky stuff, like allowing servers and volumes to be grouped. Therefore, it would easier to work with them in the GUI."
"In Pure Storage FlashArray, the area with room for improvement is local MFA login."
"I would like the ability to swap out the network adapters into it. So, without taking out the whole controller, I would like to be able to swap adapters. This would make things easier."
"Some services could be inserted directly into the SAN, so Pure Storage could complete with the HyperFlex."
"I like what they're doing, but some of my customers complain that they do not have all the bells and whistles and knobs to fine-tune workloads that some of the competitors have. In my opinion, that's good. All customers don't have dedicated storage gurus, and they can get themselves into trouble if they fine-tune too many of those high-performance knobs, but they do get knocked down. Pure Storage takes a hit in the minds and opinions of some of the customers because they cannot customize things as much as compared to a legacy storage provider's appliance such as NetApp, Dell EMC, or even HPE. I personally think 95% of my customers are better off letting the system fine-tune itself. That was something that you needed to do 12 or 15 years ago, but now with all-flash, the technology can handle what it needs to handle. Customers just end up shooting themselves in the foot if they are tweaking too many default settings."
"The storage system itself should have built-in capabilities for different ransomware attacks."
"The solution's compression needs to be improved, as it's not the best."
"The ZIO interface could be improved."
"We're not satisfied with the deduplication and compression for our volumes."
"Currently, when we want to hook up tape drives, we have to add some extra equipment, which is a little bit complex."
"The pricing should be more competitive."
"There could be a possibility of not requiring to buy a new box while upgrading to a newer version."
"IBM's support is not good. I experienced a big problem where I opened the console IBM Storage and would see that something was broken. I called the call centers, and I said, "I have a problem. My drive is not working." They want me to give them the serial number, I gave it to them and they told me "I cannot find your product. Your product is not here.""
"For improvement, the memory or storage should not exceed 90% capacity, as it becomes difficult to manage beyond this threshold."
"It would be beneficial if there were a migration tool for the new way of syncing data for data protection. Currently, we have 30 days' worth of snapshots going back and forth for data protection. A migration tool to transition to better syncing for DR would be valuable, as otherwise, we lose 30 days because of the storage requirement."
"Nutanix Unified Storage (NUS) needs improvement, particularly for firmware upgrades, as sometimes updates take a whole day and it can be unclear whether the issue is with Nutanix Unified Storage (NUS) or the hardware, requiring us to reconfigure everything, which is a main point we want consolidated into one solution."
"The integration feature with Nutanix Unified Storage (NUS) could be improved, maybe into a more stabilized version."
"Nutanix should improve the one-click upgrade. There are a lot of dependencies on third-party licenses and HP hardware we use internally, and the one-click upgrade fails sometimes."
"While Unified Storage has evolved a lot over time, its database handling needs to improve a little. There could be an improvement in terms of costs. It's a little expensive for Brazil but still delivers a lot of performance."
"Nutanix could improve the ability to track user actions, such as identifying who deleted a folder."
"Nutanix Unified Storage (NUS) needs improvement in compatibility with Windows solutions."
 

Pricing and Cost Advice

"When you are paying more than you were paying for the storage space, you'd like the cost to be less. If they could get into the spinning disk kind of cost, that would be it."
"Its price is almost double than any other flash storage solution."
"We have 16 or 18 arrays. We like to do the three-year support model so that we get Evergreen and therefore, we get free upgrades. We pay around more than 1.5 million dollars."
"We do not incur additional costs beyond the licensing fee."
"The cost has room for improvement."
"I don't know the exact cost but it's around $1,000."
"It's a good price point and it's a solid product for the price."
"We purchased a license to use this solution and we pay for the storage ourselves."
"The tool's pricing is competitive."
"There are pricing options from the mid-rand to the high-range, of which the suitability depends upon the requirements."
"Price-wise, the solution offers excellent pricing to its users. In short, the prices offered by the solution are competitive compared to similar solutions."
"The price of IBM FlashSystem 9100 NVMele can be considered affordable when taking into account the operating system that is required for it to function properly. This operating system, which is licensed by IBM, may carry a higher cost, but it is worth the investment for larger corporate entities, such as insurance companies, Fortune Five companies, and banks, who make up a significant portion of their target market. The FlashSystems are designed for larger corporations and multinational enterprises, and may not be the most cost-effective solution for smaller businesses."
"Compared to other solutions, the cost of IBM FlashSystem 9100 NVMe is reasonable, with a one-time payment of around $70,000. However, additional support is available for $25,000 for three years. The overall maintenance cost is steep."
"Compared to its competitors, IBM's offering is the most cost-effective."
"The solution is priced well."
"On a scale of one to ten, where one is a low price and ten is a high price, I rate the pricing an eight."
"The cost of Nutanix Unified Storage can be prohibitive for some small and medium-sized businesses, making it challenging for them to adopt the product."
"With all of the Nutanix equipment, the licensing is expensive. We operate in the enterprise space, but we're a midsized company. At times, the price tag is a little bit shocking for a company with only 35 employees. We're not a Fortune 500 company, but we deal with Fortune 500 drug and energy companies. We have to play in that enterprise space if we're going to have enterprise customers. I'm very price-conscious, but I understand that if I want the best, I've got to pay the price."
"I'm happy with the cost and licensing because I don't have big volumes."
"Nutanix's pricing is definitely much better when compared to other storage providers. That was one of the main reasons we switched to this platform."
"The product has an annual licensing fee."
"Nutanix Unified Storage pricing is reasonable."
"Nutanix offers different pricing options, including Ultimate and Ultimate Pro."
"I find Nutanix Files Storage competitively priced, even its feature set. Its price is seven out of ten."
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Top Industries

By visitors reading reviews
Financial Services Firm
12%
Construction Company
9%
Manufacturing Company
8%
Computer Software Company
8%
Financial Services Firm
12%
Marketing Services Firm
11%
Government
8%
Computer Software Company
8%
Computer Software Company
14%
Manufacturing Company
12%
Financial Services Firm
8%
Comms Service Provider
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business66
Midsize Enterprise36
Large Enterprise152
By reviewers
Company SizeCount
Small Business8
Midsize Enterprise8
Large Enterprise6
By reviewers
Company SizeCount
Small Business29
Midsize Enterprise31
Large Enterprise68
 

Questions from the Community

Which should I choose: HPE 3PAR StoreServ or Hitachi Virtual Storage Platform F Series?
Both are great platforms, but if you are considering all flash solutions, I would recommend you to consider Pure Stor...
What is your experience regarding pricing and costs for Pure Storage FlashArray?
The only issue is the pricing. Because we have competition, our customers always take another brand and say they can ...
What needs improvement with Pure Storage FlashArray?
Our customers using Dell storage also use competing solutions. Our customers who have Everpure FlashArray may also ha...
What is your experience regarding pricing and costs for IBM FlashSystem 9100 NVMe?
The tool is expensive, though I do not know the specific licensing costs.
What needs improvement with IBM FlashSystem 9100 NVMe?
The solution's compression needs to be improved, as it's not the best. Furthermore, support from the partner could al...
What is your primary use case for IBM FlashSystem 9100 NVMe?
We use IBM FlashSystem 9100 NVMe as a storage device in the IT industry.
What is your experience regarding pricing and costs for Nutanix Unified Storage?
Nutanix Unified Storage (NUS) helps to reduce the total cost of ownership in general. However, I am getting complaint...
What needs improvement with Nutanix Unified Storage?
I hope Nutanix Unified Storage (NUS) will improve the clarity of the licensing uses and enhance the reporting and ana...
What advice do you have for others considering Nutanix Unified Storage?
The pros of Nutanix Unified Storage (NUS) compared to EMC technologies include the fact that Nutanix Unified Storage ...
 

Also Known As

Pure Storage FlashArray
IBM FlashSystem 9100, FlashSystem 9100
Nutanix Files Storage, Nutanix Volumes Block Storage, Nutanix Objects Storage
 

Overview

 

Sample Customers

Nielsen, Lamar Advertising, LinkedIn, Betfair, UT-Dallas
Information Not Available
JetBlue, International Speedway Corporation, Volkswagen SAIC, Brighton and Hove City Council, Foresters Financial, Janus International Group, Cloud Comrade, Serco
Find out what your peers are saying about IBM FlashSystem 9100 NVMe vs. Nutanix Unified Storage (NUS) and other solutions. Updated: April 2026.
893,311 professionals have used our research since 2012.