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IBM Spectrum Scale vs Microsoft Storage Spaces Direct comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Dec 5, 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 Storage FlashBlade
Sponsored
Ranking in Software Defined Storage (SDS)
8th
Average Rating
8.8
Reviews Sentiment
7.5
Number of Reviews
39
Ranking in other categories
All-Flash Storage (15th), File and Object Storage (8th)
IBM Spectrum Scale
Ranking in Software Defined Storage (SDS)
10th
Average Rating
8.4
Reviews Sentiment
7.1
Number of Reviews
14
Ranking in other categories
Cloud Software Defined Storage (2nd)
Microsoft Storage Spaces Di...
Ranking in Software Defined Storage (SDS)
9th
Average Rating
7.6
Reviews Sentiment
6.5
Number of Reviews
11
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of October 2025, in the Software Defined Storage (SDS) category, the mindshare of Pure Storage FlashBlade is 4.1%, down from 4.5% compared to the previous year. The mindshare of IBM Spectrum Scale is 3.9%, down from 4.7% compared to the previous year. The mindshare of Microsoft Storage Spaces Direct is 7.3%, up from 7.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Software Defined Storage (SDS) Market Share Distribution
ProductMarket Share (%)
Pure Storage FlashBlade4.1%
Microsoft Storage Spaces Direct7.3%
IBM Spectrum Scale3.9%
Other84.7%
Software Defined Storage (SDS)
 

Featured Reviews

MikaelHellström - PeerSpot reviewer
Has handled backup storage needs reliably and supports seamless upgrades
In environments requiring high throughput and low latency, Pure Storage FlashBlade provides high throughput and normal latency, but we do not have any application that requires low latency right now, so the latency of three to five milliseconds is considered kind of high. Pure Storage FlashBlade's ability to integrate with enterprise applications is not important for us, as we only want to present an S3 bucket for our backup, which we have done, and it works very fast. We use the Purity software's data reduction techniques; we have a backup software that compresses everything before sending it to the S3 bucket, achieving a data reduction of 1.1 to one. I would recommend Pure Storage FlashBlade to other companies because it's a very fast and scalable solution for anyone who needs it. On a scale of 1-10, I rate this solution an 8.
Sachin Prakash - PeerSpot reviewer
Has optimized performance using cluster deployment and distributed file access but needs better visibility into network dependencies
IBM Spectrum Scale being software-based storage allows users to utilize any hardware supported or defined by IBM without dependency on physical hardware provided by IBM. This is one of the features I appreciate most because if you have existing infrastructure at your site but don't want to reinvest in hardware, you can purchase IBM Spectrum Scale software and deploy it as software-defined storage. Users can comfortably access data from their host to the storage host without relying on new network setup when deploying GPFS as it uses the existing corporate network. However, high-speed ethernet network is required. By adding switches to the same network where client hosts reside and deploying GPFS storage array, any file system created on the storage cluster can grant export permissions determining which hosts can access specific file systems. These hosts can directly mount them as remote file systems. The process is simpler compared to defining IQN for providing access to client hosts. Creating a cluster for clients with virtual machines or physical Linux/Windows machines requires installing GPFS services on client nodes, which creates a client cluster. Access is defined on the storage cluster for the particular client cluster, allowing all hosts in that client cluster to mount file systems with granted permissions.
Stanislaw Mielicki - PeerSpot reviewer
Achieve cost-effectiveness with superior performance while needing to address cluster support
I am working with Microsoft Storage Spaces Direct for applications, SQL, and VRS. I am an integrator for this solution The price performance is the best advantage of Microsoft Storage Spaces Direct. They introduced the All-Flash array using SSD or NVMe drives without cache drives. It is…

Quotes from Members

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

Pros

"It helps simplify our storage, because the user interface is very simple and the installation is easy."
"I would rate this solution an eight plus. It has has good flexibility and stability, it's easy to manage and the response time is good."
"The most valuable features of FlashBlade include its replication capabilities, reports, and easy allocation. Everything is user-friendly."
"Speed and ease of use are the two most valuable features."
"It performs well and it is also very fast."
"I like its size. It is smaller than the other competitors. We can plug in many blades, and we can have data up to one terabyte."
"The tool's most valuable feature is its fast performance, especially in handling snapshots. It helps during power outages when we need to quickly move data between different data centers. It ensures efficient replication and helps maintain our data centers' uptime."
"The most valuable features of this solution are the rewrite speed and the nonstop services."
"IBM Spectrum Scale being software-based storage allows users to utilize any hardware supported or defined by IBM without dependency on physical hardware provided by IBM."
"I would rate my overall experience with IBM Spectrum Scale as nine out of ten."
"Technical support has been very helpful. They provide us with pretty good solutions that we can implement moving forward."
"Its great servicing high availability. That is what it is used for."
"It has been pretty reliable throughout the years. As far as capacity is concerned, it can handle most heavy loads."
"It is a scalable solution."
"The high performance of the solution is its most valuable aspect. If you compare it to other storage solutions, it's much better."
"I rate this product ten out of ten."
"The main positive impact that Microsoft Storage Spaces Direct has had on my company over the years is increasing performance; our checks show it is three times faster than VMware, making us extremely happy and motivated to keep using it."
"The price performance is the best advantage of Microsoft Storage Spaces Direct."
"Its technical support is excellent."
"The price performance is the best advantage of Microsoft Storage Spaces Direct."
"It's mainly about the storage expansion, like in hyper-converged solutions."
"The flash ability, in terms of tiering and caching, is amazing"
"The most valuable feature are the caching capabilities using the storage class memory."
"The initial setup is straightforward."
 

Cons

"It usually comes down to just what you hit and the value you're getting when you spend the money and license the products. I would always go, "If you want to make things better, lower your price and make your licensing simpler." There's always an opportunity around that."
"I have not seen ROI."
"In terms of scalability, it doesn't expand out quite as robustly as some of the others, but it covers 90% of the market in what it does."
"I would also like to see better support for CIFS workloads."
"The only thing I feel FlashBlade is missing is the SOS API. If it had SOS API, that would put it well over the top."
"The features provided for SMB customers are limited."
"The documentational aspect of FlashBlade needs improvement."
"I would like to see the licensing fees improved as well as the price per terabytes."
"The main issue that we have now is with the encryption. They want to use more metrics in encryption, which is not working very well."
"I wish there were some graphical user interface to access the GPFS file system creation and monitoring."
"The initial setup is complex, especially if trying to avoid erasure coding, as it requires more discs. Avoiding erasure coding can significantly increase costs."
"The biggest problem is that it is not able to provide block storage."
"Initially, stability was a concern as we encountered numerous issues and errors."
"We do have some issues where Spectrum Scale does not work as expected. We have seen our Spectrum Scale servers go down unexpectedly, but because we have a cluster, it does not take out the entire organization."
"I believe there is no graphic user interface, so they should include it."
"It would be helpful if there was a graphical user interface that could walk you through the deployment process. The instructions surrounding setup aren't the best. They need to be more step-by-step."
"More optimization could be done in terms of mirroring."
"It is difficult to get a hardware compatibility certification for the solution."
"I think the online documentation needs a lot of work and so do the sizing tools."
"The integration is not difficult because there is no GUI, but we need to use a PowerShell command. This makes it difficult to monitor and to see the components' statuses."
"It is scalable, but only beyond two nodes. If I go for two nodes it's not scalable. I need to build a complete cluster from the beginning if I'm going for two nodes."
"There is a lot of room for improvement. I would like to have more tools to monitor the function and problems."
"Microsoft closed the shared cluster support, which is important for the solution."
"The management tool within this solution could be improved. We would also like to be able to access services like Azure when using this solution."
 

Pricing and Cost Advice

"Pure Storage FlashBlade is a hardware appliance, and it's very expensive if you compare its price with other solutions. You can get the same features and benefits from its competitor, VAST Data, but for half the price of Pure Storage FlashBlade."
"The price is a little high."
"I understand that it is competitively priced compared to other brands."
"The pricing for FlashBlade is between cheap and moderate."
"The price of this solution could be made more affordable."
"The pricing is relatively expensive due to the FlashBlade technology. However, for companies needing quick and reliable data access, the cost is justified."
"I have seen ROI. It has allowed me to increase the density of my VMs without having to purchase anything additional."
"The product is very expensive."
"The licensing model is complex and depends on factors such as the number of processing cores and the amount of storage."
"The solution is costly but reliable."
"The licensing is based on the number of terabytes."
"With the data center licensing and everything that is connected to that, this solution is relatively costly."
"Cost-wise the product is one of the more affordable within the category of products."
"The solution is expensive."
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Top Industries

By visitors reading reviews
Computer Software Company
12%
Financial Services Firm
11%
Manufacturing Company
10%
Government
7%
Financial Services Firm
18%
Manufacturing Company
10%
Computer Software Company
10%
Government
8%
Computer Software Company
15%
Financial Services Firm
9%
Government
9%
Manufacturing Company
9%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business11
Midsize Enterprise11
Large Enterprise21
By reviewers
Company SizeCount
Small Business6
Large Enterprise8
By reviewers
Company SizeCount
Small Business7
Midsize Enterprise1
Large Enterprise3
 

Questions from the Community

What do you like most about Pure Storage FlashBlade?
The tool's most valuable feature is its fast performance, especially in handling snapshots. It helps during power out...
What is your experience regarding pricing and costs for Pure Storage FlashBlade?
The pricing of Pure Storage FlashBlade is expensive compared to other products I used from other companies in the pas...
What needs improvement with Pure Storage FlashBlade?
I believe there is not much improvement needed because they have everything we need, but the interface is a little bi...
What is your experience regarding pricing and costs for IBM Spectrum Scale?
IBM Spectrum Scale is very expensive with complex pricing models usually based on the amount of storage used or the n...
What needs improvement with IBM Spectrum Scale?
There is room for improvement in the web interface. There could be more information available, such as charts and gra...
What is your primary use case for IBM Spectrum Scale?
My personal use of this product is for parallel writing or reading files.
How does VMware vSAN compare with Microsoft Storage Spaces Direct?
We found VMware’s vSAN was easy to set up, configure, and manage compared to other solutions we considered. It is bes...
What is your experience regarding pricing and costs for Microsoft Storage Spaces Direct?
Overall, I find the cost of Microsoft Storage Spaces Direct to be affordable for the on-prem Windows pure solution, b...
What needs improvement with Microsoft Storage Spaces Direct?
Microsoft should improve the management aspect of Microsoft Storage Spaces Direct, as we have raised multiple recomme...
 

Also Known As

No data available
No data available
MS Storage Spaces Direct
 

Overview

 

Sample Customers

ServiceNow, Mercedes-AMG Petronas Motorsport, Dominos, Man AHL
Information Not Available
Acuutech, Quest Technology Management, Bradley, Mead & Hunt
Find out what your peers are saying about IBM Spectrum Scale vs. Microsoft Storage Spaces Direct and other solutions. Updated: September 2025.
872,778 professionals have used our research since 2012.