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Dell PowerScale vs QoreStor comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Mar 1, 2026

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
Average Rating
9.0
Reviews Sentiment
7.3
Number of Reviews
227
Ranking in other categories
All-Flash Storage (3rd)
Dell PowerScale
Average Rating
8.8
Reviews Sentiment
7.0
Number of Reviews
97
Ranking in other categories
NAS (1st), File and Object Storage (1st)
QoreStor
Average Rating
8.0
Reviews Sentiment
7.2
Number of Reviews
10
Ranking in other categories
Backup and Recovery (53rd), Data Replication (8th), Disk Based Backup Systems (8th), Storage Software (4th), Disaster Recovery (DR) Software (28th), Software Defined Storage (SDS) (19th), Copy Data Management (6th), File and Object Storage (23rd)
 

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.
SK
Solutions Architect at a university with 10,001+ employees
Operates seamlessly and minimizes downtime while meeting enterprise file share demands
The features of Dell PowerScale (Isilon) that I appreciate the most include the scale of architecture and the way it is designed. These features benefit my company by providing less downtime and less overhead. While I have not calculated an exact number regarding the reduction in downtime, we have always been using the product, so we have no baseline to compare it to. However, it is a very good product. Dell PowerScale (Isilon) scales very well with the growing needs of my company.
MW
Works at a financial services firm with 11-50 employees
Backup storage has shrunk dramatically with deduplication but still needs stronger security options
The air gap feature is something I'd really like to see in QoreStor. There's no native air gap capability right now, and for security-conscious environments, that's a gap. The configuration export is also limited in QoreStor. If you want to document your setup or migrate configuration to a new instance, it requires more manual work than it should.

Quotes from Members

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

Pros

"You get what you pay for; it is expensive, but it really works, so I would really recommend using Pure Storage."
"It's easy to use, and the maintenance upgrades to get free controllers work really well."
"Having fast storage allows actual servers to perform in high capacity so we don't have slowdowns on our applications."
"Before we used Pure Storage it took 93 days of employees who run the database to back up and restore databases, and the scale of deployment basically went from several days to a few minutes."
"Having an intuitive user interface to get things running is great."
"It simplifies storage."
"The performance and the ever-growing maintenance are the most valuable features of this solution."
"It is the SAN backbone for our company."
"The most valuable feature of the solution is its performance."
"Dell PowerScale (Isilon) has powerful security, which makes it a very reliable storage solution for our content, and also the support and observability of our system; the call home feature is fantastic because when it presents an issue, Dell automatically opens a ticket regarding any warnings or alerts, allowing us to have a complete view of our system's health."
"The solution's scalability is very good."
"The recent introduction of inline deduplication and compression has drastically improved our efficiency ratios to make it an economical product. This solution has also had a positive impact on our employees' productivity because it reduces the amount of admin that our staff needs to handle."
"Overall, Dell PowerScale (Isilon) has made the management of the data and networks easier."
"It's easy to manage. The web UI is very intuitive, and there's CLI also that you can use to manage it."
"I assess the stability and reliability of Dell PowerScale (Isilon) as perfect, as we haven't had any hiccups with it so far."
"The tool's most valuable features are scalability and stability."
"Quest QoreStor is very stable compared to our previous solution."
"Deduplication is the most valuable feature. It saves us a lot of space. When we back up 100 terabytes of data, after dedupe, it only uses maybe five to six terabytes for the disk space in QoreStor."
"I would rate QoreStor a ten out of ten for what it offers for the price."
"QoreStor has helped us to reduce our backup storage requirements on-premises. We've been using the same devices for quite a while, and so it lets us keep using them as opposed to having to rip out all that hardware and create a new on-prem solution. The advantage here is even if we had to retire the hardware tomorrow, the QoreStor part doesn't change. We just have to have additional hardware and put the solution back on whatever hardware we pick and it'll do the same thing."
"Not having to be onsite to swap tapes on a daily, weekly, or monthly basis, alone, has really paid for its usage through the savings in time."
"Data deduplication and replication would be the top two features. The encryption and cloud tiering are also attractive for the future."
"The features we use for the data deduplication are nice because we're able to back up a much larger amount of data, yet it doesn't necessarily take up that much data on the devices."
"QoreStor has helped to reduce our backup storage requirements on-premise by at least 90%."
 

Cons

"We have not seen a reduction in our TCO nor have we seen ROI."
"It doesn’t provide enough information on performance analytics. For example, Nimble Storage has Infosight, which provides data; Pure Storage doesn’t have an equivalent."
"The cost of the storage needs improvement."
"It was a little costly. The price was ultimately higher than both of the other solutions that we evaluated. I'd say that's the only downside."
"The way Pure Storage does the controller storage warranty or replacement has been an issue for some people who just replace the controllers every couple of years, and that's where some of the confusion with pricing and support has come in. They should be clear on the way the controller replacements happen, as it is important to know whether or not you can get a good return on them, because it can be a little confusing."
"I have been primarily working with storage and have not fully explored other areas, but there is some room for improvement when it comes to performance reporting."
"We would always like to see higher performance, and lower pricing is always better."
"I want to improve the overall service level of the solution."
"Since our Dell PowerScale (Isilon) is our own on-prem in-house built system, we don't have many up-to-date resources, and we're still a few years behind."
"I believe the support engineers need to improve their skills."
"I have escalated questions to the technical support team of Dell, and I find the support center to be very poor compared to what it was during EMC's time."
"Dell PowerScale (Isilon) could be improved, particularly the UI, which could use some polishing as far as ease of use for the customer."
"An example of something that is problematic at the moment or that I would want to see improved is that there needs to be further delineation between access zones and settings."
"The solution can be a bit complex for those not well versed in the technology."
"Sometimes, it takes too long to set up everything. That's something I would want them to improve."
"Some improvements to the NFS support would be of interest to us."
"Support is one point of improvement for Quest QoreStor. Support is sometimes not adequate."
"The ransomware protection of QoreStor could use improvement."
"The installation could use improvement. The initial installation was a little touchy and it's not really user-installable. You have to have a connection to support to install."
"The management interface is in need of improvement. The graphical user interface (GUI) for the web management tools appears clunky, and not super intuitive."
"The importance of support is significant to me. I was working for a service provider, and all of our customers had a Quest or warning. Sometimes the support really underperforms."
"They need to increase their maximum capacity. Other than that, they're doing a pretty good job."
"In terms of improvement, we would like to have an Air Gap feature to prevent a virus from attaching to something. So that when we don't do a backup, we want the QoreStor to stay offline. It would be a nice feature to have."
"They could improve on support a little bit. We have not had to engage their support much, but when we do have issues, it can take longer to get things resolved."
 

Pricing and Cost Advice

"Pure has been flexible with us on the pricing models."
"In terms of other contemporary arrays, Pure is something you need to have a use case for, as it's not priced for you to buy one off-the-shelf. If you have a use case, heavy lift Oracle Databases, any type of noticeable virtual desktop infrastructure (VDI), or need low latency and high throughput, you should consider all-flash at least and probably Pure Storage."
"We would like them to improve the pricing, so we could put them to use some more product, like backup or long-term storage. In the future, if the price goes down, then we could buy different types of products."
"There is always room for negotiation."
"We have seen a reduction in total cost of ownership."
"Pure Storage FlashArray is expensive."
"In comparison to the competitors, Pure is very price-competitive for the future functionality that it provides."
"There are no fees for licensing. The hardware is paid for only once."
"The pricing for this solution is reasonable."
"Dealing with the product costs and licensing areas is getting easier since Dell is simplifying the licensing process and licensing packages offered to users."
"Dell PowerScale is an expensive solution compared to other products like Qumulo."
"The pricing is excellent."
"It is a really expensive solution."
"This solution is priced slightly higher than others on the market but does offer good quality. With this solution's data reduction and compression, we were able to purchase less. Costs have dropped because of the data rate of compression and deduplication."
"Pricing for this solution is reasonable."
"The platform is not cheap. However, on the software side, you can choose what you want license. So, you can start your licensing with the features that you need, then after buying the platform add some other features."
"Quest QoreStor's pricing is affordable. We evaluated Veeam, a well-known company for backup solutions, but found their pricing to be quite high. Veeam's price was almost double. For us, Quest QoreStor is very affordable."
"Its pricing model is very attractive. You have one price, and you get everything from QoreStor."
"The cost is per terabyte, and overall, the cost was reasonable when compared to some competitors."
"The pricing is good. It is competitive for a managed services provider. I like the ability to pay by the terabyte, allowing for an incremental cost that we and our customers can afford, so the solution grows with the customer."
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Top Industries

By visitors reading reviews
Manufacturing Company
14%
Financial Services Firm
12%
Construction Company
10%
Computer Software Company
7%
Manufacturing Company
11%
Financial Services Firm
9%
Computer Software Company
9%
Government
7%
Manufacturing Company
14%
Construction Company
11%
Financial Services Firm
11%
Comms Service Provider
10%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business69
Midsize Enterprise37
Large Enterprise157
By reviewers
Company SizeCount
Small Business25
Midsize Enterprise23
Large Enterprise53
By reviewers
Company SizeCount
Small Business7
Midsize Enterprise1
Large Enterprise2
 

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 needs improvement with Pure Storage FlashArray?
I do not have any improvements at the moment; I like how it is. I have nothing to add about needed improvements.
What is your experience regarding pricing and costs for Dell EMC PowerScale (Isilon)?
My experience with pricing, setup cost, and licensing for Dell PowerScale has been expensive. Setup costs or provisio...
What needs improvement with Dell EMC PowerScale (Isilon)?
I believe the support engineers need to improve their skills. In our case, the engineer provides adequate hardware su...
What is your primary use case for Dell EMC PowerScale (Isilon)?
Dell PowerScale's primary use case for our organization is server virtualization.
What else besides data replication does QoreStor offer?
Quest QoreStor can be used for multiple things besides data replication. For example, it can be trusted to make a bac...
How does Quest QoreStore protect your data?
One of our favorite features of Quest QoreStore for data protection isn't the backup, actually, though we're using it...
How does Quest QoreStore solve repetitive data replicas?
When I first found out about data replication and the many benefits it had, I couldn't help but wonder - what about t...
 

Also Known As

Pure Storage FlashArray
PowerScale, Dell EMC Isilon
QoreStor
 

Overview

 

Sample Customers

Nielsen, Lamar Advertising, LinkedIn, Betfair, UT-Dallas
OMRF, University of Utah, Translational Genetics Research Institute, Arcis, Geofizyka Torumn, Cyprus E&P Corporation, Colburn School, Columbia Sportswear, Harvard Medical School, University of Michigan, National Library of France,
American Airlines, at&t, Bank of America. Barclays, ebay, Ford
Find out what your peers are saying about Dell PowerScale vs. QoreStor and other solutions. Updated: April 2026.
899,258 professionals have used our research since 2012.