Deduplication and VTLs.
Backup Administrator at a financial services firm with 501-1,000 employees
If you have a senior backup and/or storage tech, go for it. If not, it's harder to manage.
Pros and Cons
- "With the increasing amount of data handled every year, the money we save on tapes, plus the speed that the DD allows backups to be done and having instant restores, makes this product the best investment a backup environment can add."
- "Adding tapes to the VTL is a complex task."
What is most valuable?
How has it helped my organization?
As the cost of tapes start to mount, using the DD box for daily and weekly backups, and just keeping monthly backups on tapes, has greatly reduced the cost of backups.
It is an extremely useful tool to use for example in my case, in a redundant environment, as I manage duplications through Netbackup with Storage Lifecycle Policies. I keep my daily and weekly backups on the DD boxes replicated on both sites, and download the monthly backups for archive purposes.
That way I get the instant recovery that the DD unit provides, and in case I need to go live on the secondary environment, I can restore any vmware server in a matter of hours.
What needs improvement?
1 - Adding tapes to the VTL is a complex task.
2 - If DB backups could be somewhat compressed it would just be the dream product.
For how long have I used the solution?
5 years on different versions of DD.
Buyer's Guide
Dell PowerProtect Data Domain
November 2026
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What was my experience with deployment of the solution?
None on basic deployment for CIF usage, the VTL and virtual tapes is more complex to setup.
What do I think about the stability of the solution?
None at all, I have hardly had to reboot the boxes aside from a firmware update.
What do I think about the scalability of the solution?
None, I am adding a second disk box and it is pretty much plug and play.
How are customer service and support?
Customer Service:
Excellent, when there is a new firmware update, EMC will call me to do the upgrade without even having to ask.
I have had a couple of hard drive fail, and they sent a replacement right away.
Technical Support:Very good, I had only had to deal with first level support for firmware updates, had some minor discrepancies with the steps to follow, after reading the instructions on how to do the firmware upgrade, the tech wanted to jump a couple steps.
Which solution did I use previously and why did I switch?
No, we had regular backups to tape and a staging area, but no deduplication.
How was the initial setup?
Initial setup is pretty straightforward, VTL configuration is a bit more complex.
What about the implementation team?
Implementation was done through a vendor, their level of experience was very good. At the time of implementation I have had experience with the technology, but had not participated in the initial setup of the product.
What was our ROI?
With the increasing amount of data handled every year, the money we save on tapes, plus the speed that the DD allows backups to be done and having instant restores, makes this product the best investment a backup environment can add.
Which other solutions did I evaluate?
At the time of purchase, there was no other solution that was able to perform the same tasks.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Engineer at a tech services company with 501-1,000 employees
The Deduplication storage Array for backups. Data Domain can acts as VTL, NAS/CIFS shares or DDBoost devices.
Pros and Cons
- "The EMC Data Domain product is a real success and customers which have never bought EMC products are now buying Data Domain..."
- "DDBoost function is not compatible with IBM TSM."
Valuable Features:
Deduplication
Features of Archiving
Improvements to My Organization:
*) Thanks to deduplication, backups take less capacity in Data Domain than traditional storage devices.
*) Backups to VTL take less time to finish than traditional tape backups (the time traditionally allowed to mounting/seaching tapes is avoided).
*) Using DDBoost improves DataDomain system throghput up to the double and Network usage during backup will be reduced.
Room for Improvement:
DDBoost function is not compatible with IBM TSM. Since DDBoost is one of Data Domain key options (it enhance its performance up to the double), it wil be great if in the next future Tivoli Storage Manager can support it!
Use of Solution:
< 1 year
Deployment Issues:
The deployment is very easy. No problem encountred.
Stability Issues:
No
Customer Service:
10/10
Initial Setup:
Initial setup is easy: After hardware installation (which is well documented) you just have to power up the data domain device then run a script which configure your device.
Then you can configure backups devices using webgui and this is really easy.
Other Advice:
The EMC Data Domain product is a real success and customers which have never bought EMC products are now buying Data Domain...
Disclosure: My company has a business relationship with this vendor other than being a customer. We are an EMC partner
Buyer's Guide
Dell PowerProtect Data Domain
November 2026
Learn what your peers think about Dell PowerProtect Data Domain. Get advice and tips from experienced pros sharing their opinions. Updated: November 2026.
920,929 professionals have used our research since 2012.
Sr. Tech Lead with 5,001-10,000 employees
I used Sympana commvault and CA Arcserve. Both are good for small organisations but not up to the mark for enterprise.
Pros and Cons
- "Fast backup for complex and huge size data."
- "From a technical point of view, all EMC products have to improve the troubleshoot feature like, log should be in human readable format."
What is most valuable?
Fast backup for complex and huge size data.
How has it helped my organization?
My Organisation provides Backup as services. DD useful for shared platform for customers.
What needs improvement?
From a technical point of view, all EMC products have to improve the troubleshoot feature like, log should be in human readable format.
For how long have I used the solution?
Past 5 to 6 years.
What was my experience with deployment of the solution?
Easy to deploy.
What do I think about the stability of the solution?
Wrong integration is always the
What do I think about the scalability of the solution?
Not yet.
How are customer service and technical support?
Customer Service:
3.5/5
Technical Support:3.5/5
Which solution did I use previously and why did I switch?
I used Sympana commvault and CA Arcserve. Both the products are good for small organisations but not up to the mark for enterprise level.
What about the implementation team?
Through vendor team; try to just know how to fix the hardware and plug the networker cable. Rest of the things we had to do remotely.
Which other solutions did I evaluate?
For enterprise level backup solution – No .
What other advice do I have?
I recommend EMC products due to their stability.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Director of Technical Support at a tech services company with 51-200 employees
Good product, the technical support leaves much to be desired.
Pros and Cons
- "Data Domain deduplication is excellent."
- "Technical Support: Bad. The service left much to be desired, even with the proper support."
Valuable Features
Data Domain deduplication is excellent.
Improvements to My Organization
Not yet had a significant measurable improvement.
Use of Solution
I used this solution for 6 months.
Deployment Issues
The implementation was not done with me. This product was already in place when I arrived at the company.
Stability Issues
No.
Scalability Issues
No.
Customer Service and Technical Support
Customer Service:
No.
Technical Support:Bad. The service left much to be desired, even with the proper support.
Implementation Team
The implementation was not done with me.
Other Solutions Considered
Was not present in this decision.
Disclosure: My company has a business relationship with this vendor other than being a customer. partner
Chris ChilderhoseEnterprise Architect at a tech company with 51-200 employees
Top 5LeaderboardReal User
I have to agree the Support could be much better but if you have an SE on your account they are a good resource too. Product is good but don't recommend it for a primary backup device but rather a secondary one.
Systems Consultant at a consultancy with 51-200 employees
It's a good product, with excellent customer service.
Pros and Cons
- "It makes working with backup solutions very easy."
Valuable Features
DD Boost.
Improvements to My Organization
It makes working with backup solutions very easy.
Room for Improvement
None that I see yet.
Use of Solution
3 years.
Deployment Issues
No.
Stability Issues
No.
Scalability Issues
No.
Customer Service and Technical Support
Customer Service:
5 out of 5
Technical Support:5 out of 5
Implementation Team
A vendor team, they were excellent.
Other Solutions Considered
The company chose this product not me, so no.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Senior Consultant Server & Storage with 1,001-5,000 employees
Replication of backed-up data between sites for disaster solutions is valuable. Delivers all the time.
Pros and Cons
- "It was the first VTL we used for customers and because of its function and uptime we can’t see a reason to change to another vendor."
What is most valuable?
VTL, Dedupe and replication.
How has it helped my organization?
Replication of backed-up data between sites for disaster solutions.
What needs improvement?
Haven’t thought about it because its deliver all the time.
For how long have I used the solution?
5 years for customers.
What was my experience with deployment of the solution?
No.
What do I think about the stability of the solution?
No.
What do I think about the scalability of the solution?
No.
How are customer service and technical support?
Customer Service:
10 of 10.
Technical Support:10 of 10.
Which solution did I use previously and why did I switch?
No, it was the first VTL we used for customers and because of its function and uptime we can’t see a reason to change to another vendor.
How was the initial setup?
A walk in the park = straightforward.
What about the implementation team?
Both vendor and in-house. The vendor had a high level of expertise.
Which other solutions did I evaluate?
No.
What other advice do I have?
Read the config and admin guides for products and as well implementation guides for backup vendors, for my customers, IBM TSM.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Backup Engineer, AVP at a financial services firm with 1,001-5,000 employees
Stability, replication, deduplication, virtual library & ddboost are valuable but deduplication could be better.
Pros and Cons
- "Could fully automate backup process with 1500 backup clients (machines)."
What is most valuable?
Stability, replication,
How has it helped my organization?
Could fully automate backup process with 1500 backup clients (machines).
What needs improvement?
Smarter & better deduplication, CLI shell should have more options for managing this product.
For how long have I used the solution?
4 years.
What was my experience with deployment of the solution?
Yes, but it related to hard disk manufacturer, not product itself.
What do I think about the stability of the solution?
No.
What do I think about the scalability of the solution?
Haven't scaled it yet.
How are customer service and technical support?
Customer Service:
4/5
Technical Support:4/5
Which solution did I use previously and why did I switch?
Before we used EMC VTL, an awful and nasty product from EMC with lots of manual work.
How was the initial setup?
Initial straightforward.
What about the implementation team?
Via vendor with excellent support.
What was our ROI?
100%.
What's my experience with pricing, setup cost, and licensing?
We have special discount from EMC.
What other advice do I have?
Would recommend.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Engineer at a tech services company with 1,001-5,000 employees
Data Domain is a highly efficient ‘global' De-Duplication storage product that provides multi-protocol read/write access
Pros and Cons
- "Fantastic product that really is the ‘Swiss Army Knife’ of backup/archive/bulk storage products, so usable and can save significant $ and can save many headaches with data management, the more you store on it the better De-duplication and greater ROI you get."
- "In some of the entry level models (DD2200, 2500) you have to be aware of the scalability limitations and ensure you purchase a large enough controller if you foresee growth and scaling beyond its recommended operating parameters as typically the controllers cannot be upgraded in place or without data migration."
What is most valuable?
Efficient De-duplication, highly efficient replication, Data Domain BOOST for enabling a level of 'Source-Side’ De-duplication.
How has it helped my organization?
For many clients it has provided a Backup & Archive tier of storage separate from primary storage systems, replicated so as to eliminating the need for tape and has enabled organisations to achieve backups within backup windows and provide an appropriate place to tier and archive inactive data too whilst ensuring it is protected, secure and recoverable.
What needs improvement?
Tighter integration with certain storage arrays or software for even more seamless data tiering perhaps, however the system is quite hard to fault as it ‘just works’.
For how long have I used the solution?
I have used Data Domain for over 4 Years, designing, implementing and integrating it as part of a solution for many clients with diverse needs of all scales.
What was my experience with deployment of the solution?
Watch out for getting the sysadmin default password wrong more than 5 times, it will lock you out and requires a hard reset which has to be done via serial connection and is time consuming. My best advice is to create at least another admin account immediately at deployment time with a simple password as a ‘backdoor’ and then remove this account once configuration is complete.
What do I think about the stability of the solution?
No, the product (both hardware and software) is very stable and robust.
What do I think about the scalability of the solution?
In some of the entry level models (DD2200, 2500) you have to be aware of the scalability limitations and ensure you purchase a large enough controller if you foresee growth and scaling beyond its recommended operating parameters as typically the controllers cannot be upgraded in place or without data migration. It is important to get a qualified EMC storage professional to size and design the solution for your purposes up front. However, the DD2500 can scale to 3 x Expansion Shelves (130TB Raw) and the larger models can scale well beyond this up to multi-petabyte scale so typically there are no real scalability issues. You have a LOT of backup and archive data if you fill one of the large systems, however proper planning and design should prevent this ever occurring in the first place.
How are customer service and technical support?
EMC Support provides a high quality service, however I have encountered very few technical issues with this particular product. When a customer did have an issue due to their backup product filling the Data Domain system (backup application mis-configuration issue) EMC Support worked tirelessly to resolve the issue with a high quality and faultless approach.
Which solution did I use previously and why did I switch?
I have seen other software based and hardware based De-duplication storage products, so far none has lived up to the efficiency, scalability and integrity of Data Domain.
How was the initial setup?
Very simple, just follow the prompts for the ‘config system’ command from the CLI. The only issue is with the new generation systems initial configuration is via Serial connection, there is no VGA port or pre-configured IP address, however after initial configuration all is very straightforward.
What about the implementation team?
I have implemented this solution for clients working for a Partner/Integrator many many times, I have also designed solutions with Data Domain for EMC… therefore I cannot answer this question without being biased. However the Data Domain system is relatively concise and not monolithic to configure in a short space of time, typically the more time will be spent tweaking and tuning backup applications to write to it in the most efficient manner.
What other advice do I have?
Fantastic product that really is the ‘Swiss Army Knife’ of backup/archive/bulk storage products, so usable and can save significant $ and can save many headaches with data management, the more you store on it the better De-duplication and greater ROI you get. If you archive inactive data to this product you can reduce primary storage (SAN/NAS) use by an average of 70%.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Chris ChilderhoseEnterprise Architect at a tech company with 51-200 employees
Top 5LeaderboardReal User
We get a compression ratio of approximately 90.4%. Within the last 24 hours we have gotten 95.8%. Pretty darn good on the new DD2500 we have.
Senior SAN Engineer with 501-1,000 employees
Upgrades are very smooth and support has been great. We also looked at ExaGrid and Quantum
Pros and Cons
- "Stability of the Data Domain has never been an issue; they have been rock solid since we have used them."
Valuable Features
Very easy to setup and Data Replication for off-site storage of data.
Improvements to My Organization
Data restores and recoveries are so much faster and easier that before, we never have to wait to recall a tape from off-site storage; More Disaster Recovery options allows us to have a better DR process; We were able to remove all TAPEs from our environment.
Room for Improvement
Based on how we use the product, it does everything we need it to do.
Use of Solution
We have been using the Data Domain product since 2008.
Deployment Issues
We encountered no issues during deployment. Their technical support is great and the product is very simple to manage.
Stability Issues
Stability of the Data Domain has never been an issue. They have been rock solid since we have used them. One time we had one of our Data Domains down for 4 days because of a hardware issue. Once the Data Domain was repaired and came back on-line the system picked up right where it left off. It automatically started to replicate all of the data between its replication partner and re-synced the data without any actions on my part.
Scalability Issues
When we had to add more storage to the Data Domain, adding another shelf of storage was very easy and non-disruptive. When you reach the capacity limit of the model you are using, then you will need to upgrade to another model with more capacity. But moving the backups to point to the new Data Domain is very easy.
Customer Service and Technical Support
Customer Service: Data Domains customer support is very good. We have always received prompt responses to anything we have needed.Technical Support: Their technical support is top notch. They are very responsive and the support personnel are very knowledgeable. The Call Home support for their product usually has already opened a support case for us before I know there is a problem.
Initial Setup
The setup is very easy. We had it up and running the same day it was installed.
Implementation Team
We had the vendor work with us to install and setup the systems. Their level of expertise was very good. If the person I was working with did not know something he was able to get with his team and resolve anything quickly.
Pricing, Setup Cost and Licensing
With any duplication product, the initial cost is not cheap. But, once the Data Domain was setup, it just runs. I have very little to no day-to-day maintenance tasks other that monitoring for alerts, which it sends an email to notify me if anything has alerted.
Other Solutions Considered
For our Technology Refresh we looked at three different vendors, Data Domain, ExaGrid, and Quantum.
Other Advice
Make sure you setup the Data Domains to use Active Directory authentication. When you are replicating your data to a replication pair, this will make using the replicated data easier to access from the off-site location. If you do not use AD and setup the same account on all of your Data Domains, then you will be using a local account on each Data Domain. The permissions on each side of the replication are for a different user SID even if the users are the same name. So when you try to access the replicated data with the same named local account, since the SID is different, you do not have access to the data without making the local account an “Administrator” on the Data Domain which is not a good idea.
Disclosure: My company does not have a business relationship with this vendor other than being a customer.
Buyer's Guide
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Updated: November 2026
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Buyer's Guide
Download our free Dell PowerProtect Data Domain Report and get advice and tips from experienced pros
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Quick Links
Learn More: Questions:
- Can anyone share their real-life deduplication ratios using Data Domain?
- Compare EMC Data Domain and HPE StoreOnce. Which is better?
- What is the biggest difference between Dell EMC Data Domain and IBM Spectrum Protect?
- What is the biggest difference between Dell EMC PowerProtect DD and Veeam Backup & Replication?
- Archive verses backup
- What is the biggest difference between EMC Data Domain and Rubrik?
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- Compare EMC Data Domain and HPE StoreOnce. Which is better?
- When evaluating Deduplication, what aspect do you think is the most important to look for?












I found that the best backup system architecture is to use DD with Veeam backup using DD-Boost.
This solution has many advantages including efficient deduplication, less backup window, less time to restore and many others...