It takes your standard IOPS in your drives and it gives you much greater performance out of that aggregate. You can run a smaller aggregate with SSDs in the flash pool, and it'll give you the IOPS of many more spindles. What it does is it brings your SATA disks aggregate up to the SAS speed, depending upon how many spindles you're running, and your SAS aggregates perform much better.
IT Analyst at a local government with 501-1,000 employees
You can run a smaller aggregate with SSDs in the flash pool.
What is most valuable?
How has it helped my organization?
We had an IOPS problem earlier. We were running Citrix and we were having boot storms. Part of the problem was the aggregates that we had were too small. The boot storm would basically fill up the NVRAM. It was unable to write to disk because the disks were running full. The problem was solved by going to flash pools. It was great.
What needs improvement?
I have not given the FAS a perfect rating because the All Flash Array is probably going to beat it down, in terms of performance.
I would give it a perfect rating if there wasn’t any ceiling. When you have some systems and you increase your disk IOPS by adding either All Flash Array or you add a flash pool, sometimes you move the bottleneck; you move the bottleneck up to the CPU. We did have that problem briefly. That was solved by basically moving some of the workload. That happened one time and we fixed it.
By moving to cluster mode, it's going to be a lot easier to move the workload. We are moving in that direction. We're doing the first assessment and planning right now.
What do I think about the stability of the solution?
We do not have any stability problems, whatsoever.
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What do I think about the scalability of the solution?
NetApp aggregates are scalable. You can keep adding shelves.
How are customer service and support?
Technical support is very good. I've never had a problem.
Usually the problem is being able to hear them in our data center. :)
Which solution did I use previously and why did I switch?
I did not previously use a different solution. When I started working with the county, they already had the NetApp FAS.
What other advice do I have?
Go with NetApp; I haven't had a problem with it.
The most important criteria for me when selecting a vendor to work with are reliability and, for technical support, being there.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Storage and VMware Expert at a comms service provider with 1,001-5,000 employees
It helps centralize and simplify all connections into one box.
What is most valuable?
It gives us the flexibility to work with all protocols on the same Storage Box. The WAFL (Write Anywhere File Layout) is the best feature implemented on this storage solution. Also, the DataONTAP is very reliable and stable, and I haven't had any problems yet. If you configure NetApp using the best practices, you should not have any issues with the performance. Lastly, the de-duplication works very well with all applications in a VMware environment, and you will save a lot of space. In my experience we save more than 80% of the space using deduplication on the volume, and if you have allflash fas you will have gain of the 3:1 and 4:1 on the your storage on the all environment without lost performance.
How has it helped my organization?
All the protocols on the same box can solve all the configurations problems. They also help centralize and simplify all connections into one box.
The feature snapmirror is too simple to configure and it is the best way to configure one storage environment with High Availability site to site.
What needs improvement?
Unify all backup software on the single tool to simplify the administration.
For how long have I used the solution?
I've been using NetApp products for Ten years, and currently i am working with models FAS6220, FAS8020 using all softwares available...
What was my experience with deployment of the solution?
I don´t find issues yet
What do I think about the stability of the solution?
No issues encountered.
What do I think about the scalability of the solution?
No issues encountered.
How are customer service and technical support?
Customer Service:
10/10.
Technical Support:10/10.
Which solution did I use previously and why did I switch?
In the past, I used, and still work with, solutions like Fujitsu and Hitachi, but when I have an opportunity to work with a NetApp solution, I don't want to go back. That's because the NetApp solutions give me more flexibility to work.
How was the initial setup?
I think it is easy, because I have implemented NetApp in the past. I don't know if someone without work experience would be able to execute the initial setup. However, if you apply best practices, you should not have an issue.
What about the implementation team?
I have experienced both in-house and vendor team implementations. Whenever it is done by the vendor, they are 10/10.
What was our ROI?
The ROI for NetApp is good, and if you use it on a VMware environment, the ROI will be even greater, and if you get the new solution Allflash FAS you will have a big gain of the storage like 3:1, 4:1 and many more dependending on the your application.
What's my experience with pricing, setup cost, and licensing?
The price, sometimes, is very high, but the ROI is guaranteed.
Which other solutions did I evaluate?
Ye I did, but I didn't find another solution that could centralize all the protocols into one box without an appliance.
What other advice do I have?
Study the NetApp solutions, and before you implement be sure to do PoCs.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Buyer's Guide
NetApp FAS Series
August 2025

Learn what your peers think about NetApp FAS Series. Get advice and tips from experienced pros sharing their opinions. Updated: August 2025.
866,561 professionals have used our research since 2012.
Senior Storage Consultant at a government with 1,001-5,000 employees
I like that there are various modes and protocols you can use at the same time.
What is most valuable?
- Multi Protocol
- Scalability
- Homogeneous hardware
There are various modes and protocols you can use at the same time. For customers who use NetApp 7-Mode, I would rate Data ONTAP 8/10 and for Clustered Mode 7/10.
How has it helped my organization?
- Centralization of protocols within the same appliance
- Software defined storage
- Easy management
- Scalability
- Support
What needs improvement?
Migration from 7-Mode to Clustered Data ONTAP need improvement. It seems NetApp didn't know how to solve the main problem of migrating data from an old OS (7-Mode ) to Clustered.
For how long have I used the solution?
I've been using it for nine years, both using and implementing NetApp FAS series.
What was my experience with deployment of the solution?
Deploying NetApp appliances is hard work. A lot of experience is required, mainly when your project runs a MetroCluster solution.
What do I think about the stability of the solution?
There's an issue when you have a mix of a low-spinning disk (SATA 3TB ) and multi-protocol access (NFS, CIFS and FCP, and iSCSI). Data ONTAP performance with WAFL goes down on mid-range solutions with multi-protocol access.
What do I think about the scalability of the solution?
We've never had an issue with Clustered Data ONTAP, but we did with 7-Mode solutions and large amounts of data in the PB range.
How are customer service and technical support?
Customer Service:
They have really good customer service.
Technical Support:They have a good level of technical support when you escalate cases.
Which solution did I use previously and why did I switch?
I've used EMC solutions in different companies.
How was the initial setup?
The initial setup was complex and you need experience.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
System Administrator - Backup & Storage Specialist at METRO SYSTEMS Romania
It provides very good storage High Availability and data protection. The thing we'd like to see the most is the possibility of pairing LAN/SAN ports from different nodes.
Valuable Features
What impressed me the most about these systems are their excellent reliability, ease of administering (both in GUI and command line), and their very good documentation that is easy to access and understand. It provides very good storage, High Availability, and data protection by employing the use of two separate storage controllers that can take over each other's role as soon as any of them goes down. The technology has been improved even more after the introduction of the cluster cDot ONTAP OS.
Improvements to My Organization
NetApp systems are a good choice if you want a versatile unified system that's also capable of delivering performance. Our company has been using NetApp filers both as file sharing solutions (CIFS over LAN) and also as block storage (LUNs) for VMware ESXi hosts.
Since we switched to the newer 2552 models, we now benefit from better data protection and improved storage capacity thanks to the clustered Data ONTAP OS.
Room for Improvement
The thing we'd like to see the most is the possibility of pairing LAN/SAN ports from different nodes. Currently, the systems only provide pairing (and thus redundancy) only at same-node level. Also, it wouldn't hurt having this sort of cross-functionality when it comes to choosing disks for aggregate structures. Right now, you can't integrate in the same storage aggregate disks from different shelves.
Use of Solution
I've had the chance to work a lot with NetApp FAS 2552 series and also have some experience with older models such as 2050, 2040, 3240 and 2240. I think it's a pretty reliable unified storage solution. The FAS 2552 model, especially, offers good performance and excellent reliability. My experience with similar storage systems is, currently, somewhat limited however.
My company has been using NetApp for a few years now, over four I think, and I have come into contact with this technology for over a year.
Deployment Issues
When it comes to deployment we had our share of issues. Some of these issues are to blame on the vendor's lack of experience with the new models and ONTAP versions, but sometimes the systems themselves were faulty.
Stability Issues
The most recent issue we had involves a LAN card that couldn't be set on the correct bandwidth setting. In consequence, the vendor had to replace one of the node's motherboard.
Scalability Issues
There have been no issues with scaling it, other than during the actual deployment of new devices.
Customer Service and Technical Support
If you buy NetApp systems from third-party vendors, then you would be surprised that their technicians aren't exactly up to date with the latest ONTAP versions. NetApp releases new versions (with great improvements) so often that it's hard for some vendors to stay up to date with their technical knowledge base.
However, when it comes to technical support from NetApp directly, they tend to have a very competent team and the reaction time is pretty decent. Perhaps their biggest strong point in this chapter is their public knowledge base which helps you solve on your own most of issues you can encounter with configuring and administering.
Initial Setup
All I can say is that if you take your time and study the NetApp documentation, you shouldn't have any issue, provided the initial setup was done properly by the vendor technician.
Implementation Team
Initial setup is usually performed by NetApp or the third-party vendor from whom you purchased the devices. Our experience with third-party vendors isn't the best due to reasons stated above. All other configuration and administration is done in-house.
Pricing, Setup Cost and Licensing
When it comes to software licensing, I think that NetApp promotes a very fair system. Basically you only pay for the features you need (eg.: Cluster Mode, SnapMirror, SnapVault, etc.).
Other Advice
The best advice I can offer is to try and purchase it directly from NetApp in order to have a better chance of having a successful initial configuration from the first try. Also, make sure you purchase the system with a General Availability OS version as Release Candidate ones tend to be bugged.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Product Owner Storage at a tech services company with 10,001+ employees
We are an online hotel reservations company, so if our website goes down we lose money at a very high rate per minute. It has been many years since we have had an outage due to storage because of FAS.
Valuable Features
- Reliability
- Snapshots
- Ease of tooling
- Integration with our systems
- It's multiprotocol
Improvements to My Organization
We are an online hotel reservations company, so if our website goes down we lose money at a very high rate per minute. It has been many years since we have had an outage due to storage because of FAS.
Room for Improvement
The performance needs to be improved. Due to the performance issues, we're moving to NetApp Flash FAS as it provides almost infinite performance.
Use of Solution
We've used it for nine years.
Deployment Issues
We've had no issues with deployment.
Stability Issues
The stability is excellent.
Scalability Issues
It's scaled well for us.
Customer Service and Technical Support
It takes a long time to resolve most cases. It requires an extensive amount of troubleshooting and tends to be very time consuming on our end in terms of collecting data for the engineers to work on.
Initial Setup
It's straightforward. I'd say, though, that it's medium complexity because it is not done in one day.
Implementation Team
We used a mixed team of in-house and vendor personnel.
ROI
I wouldn't know how to begin to calculate it.
Other Solutions Considered
That was a long time before I joined the company.
Other Advice
Do your research on clustered Data ONTAP as it is a very complicated product, much more complicated than the previous version.
Disclosure: My company has a business relationship with this vendor other than being a customer. I used to work for NetApp as a consultant.
Systems Technician at a tech services company with 51-200 employees
It made the workload we needed possible because of its flash cache and we can perform LIF migrations with clustered Data ONTAP.
Valuable Features
The most valuable feature for us is the ability to perform LIF migrations with clustered Data ONTAP.
Improvements to My Organization
It made the workload we needed possible because of its flash cache.
Room for Improvement
It would be nice to be able to mix flash cache with other technologies.
Use of Solution
We've been using it for one month.
Stability Issues
It's very stable.
Scalability Issues
It scales for the kind of customers that we have.
Customer Service and Technical Support
We'd like to get more access to level-two engineers. Sometimes its been a difficult time explaining the problem to level-one people. This process is a little bit time consuming.
Initial Setup
The initial setup was straightforward.
Implementation Team
We did implemented it ourselves.
Other Solutions Considered
When we deployed flash cache, there was no alternative for it. It was the only available cacheing solution.
Other Advice
Flash cache is a great product. If it matches with the workloads, you should consider it.
Disclosure: My company has a business relationship with this vendor other than being a customer. We are partners.
Lead Technical Architect IT at a healthcare company with 1,001-5,000 employees
It saves a lot of time and minimizes downtime, which is important because we're a hospital and we can’t afford much downtime. I'd like more automation of the expanding aggregates and discs.
What is most valuable?
- Snapshots
- Mobility of data
- High Availability
How has it helped my organization?
It saves a lot of time and minimizes downtime, which is important because we're a hospital and we can’t afford much downtime. If they can stop all downtime, it would be a big benefit for us and our patients.
What needs improvement?
I have a very small feature request: more automation of the expanding aggregates and discs.
What was my experience with deployment of the solution?
We've had no issues with deploying it.
What do I think about the stability of the solution?
The stability is very good.
What do I think about the scalability of the solution?
We have six PB of data, and have had no problems with scalability.
How are customer service and technical support?
The technical support is good.
Which solution did I use previously and why did I switch?
We have had NetApp for a long time, and were one of the first customers in Belgium.
How was the initial setup?
If you are new, you have to learn the system, but once you know how it works, it doesn’t take much time to expand or install a new system. It was not difficult at all to learn the first time.
What other advice do I have?
Over the past few years, they have evolved a lot in manageability and automation, so we are happy with the direction they are going in. They haven’t lost their eye on stability as well. Lots of new features without sacrificing anything.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Storage Administrator at a financial services firm with 51-200 employees
Its data compression saves a lot of capacity we'd otherwise have to have. It could improve by better integrating with other technologies like VMware, as there are some version conflicts.
What is most valuable?
- Clustered data ONTAP
- Data compression
- High Availability
- Snapshot technology
How has it helped my organization?
It helps us reduce costs because its data compression saves a lot of capacity we'd otherwise have to have.
What needs improvement?
It could improve by better integrating with other technologies like VMware, as there are some version conflicts. When you are using the newest storage virtual console, you cannot use VM Wall, the VM-specific firewall.
For how long have I used the solution?
We have been using it for a year for SQL databases.
What was my experience with deployment of the solution?
We've had no issues with deployment.
What do I think about the stability of the solution?
It's very stable and we've had no problems in the year we have used it.
What do I think about the scalability of the solution?
It has scaled to our needs.
How are customer service and technical support?
Customer Service:
Customer service is good; we've had no problems with them.
Technical Support:Technical support is good; we've had no problems with them either.
Which solution did I use previously and why did I switch?
We used HDS before NetApp and we switched because of the snapshot technology and high-availability function.
How was the initial setup?
The initial setup was pretty straightforward, the implementation of the system was easy, and we had great support from the NetApp team.
What about the implementation team?
We used a vendor team who had strong expertise, and we are happy with the implementation. It’s important to have NetApp technicians implement the solution because it is helpful to have some experts.
Which other solutions did I evaluate?
No other options were evaluated.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.

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Updated: August 2025
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