What is RAID 10: A Complete Guide

What is RAID 10 good for? It's lack of a limit on hard drives used in the array! It is also the safest RAID configuration.

In this guide we’re going to discuss what is RAID 10, find out if RAID 10 needs an identical drive, and much more!

Here’s a detailed answer to what RAID 10 is:

RAID 10 combines the multiple mirrored drives of RAID 1 and data striped drives of RAID 0. RAID 10 requires a minimum of four drives but does not have a maximum of drives you can use. RAID 10 usually comes in groups of two or more drives.

At the same time, it stripes data blocks across all mirrored sets. This is often called “striped mirrors.”

RAID 10 Key Features:

  • It took the best features of RAID 1 and RAID 2 to make a hybrid RAID array.
  • RAID 10 array converts all information into data blocks and writes it on multiple arrays.
  • It is the best data RAID storage option available today
  • It provides superior data protection and improved data storage performance.

RAID 10 also offers data redundancy, high READ and WRITE performance, high overall performance, and high fault tolerance.

Here is more essential information you need to know about RAID 10:

RAID 10 : What you need to know

What is RAID 10 and How Does It Work | TTR Data Recovery

What is RAID 10 and How Does It Work?

RAID 10 mirrors all data blocks on secondary drives while also striping data blocks across all drive sets. The best part is that it only requires a minimum of four drives which will be divided into two sets of mirrored drives.

PRO TIP: You can use as many drive sets as needed because what RAID 10 is known for is its unlimited use of drives!

By combining both mirroring and striping, RAID 10 speeds up the data transfer process. It is the best option for a data storage system but can be an expensive one. Half of the storage capacity is dedicated to mirroring so it is an expensive redundancy system.

How many hard drives does RAID 10 need and what are RAID 10 minimum and maximum disk requirements?

You only need a minimum of four hard drives to make a RAID 10 array. These four drives will then be grouped into two sets of drives. Each set contains redundant and striped data blocks.

For larger companies with mission-critical applications, you can add as many drives as you need. There is no limit on the number of drives you can use in a RAID 10 array.

Can I add more drives to a RAID 10 array and is there a cap on the number of drives I can use?

Can I Add More Drives To A Raid 10 Array | Ttr Data Recovery

What is RAID 10 good for? Its lack of a limit on hard drives used in the array! This means there is no limit on your data storage capacity in a RAID 10. The more drives you have in your RAID 10, the safer your data becomes.


Yes, you can add more drives and it is encouraged to do so.

Does RAID 10 require identical drives?

No, you do not need to have identical drives in your RAID 10. What is RAID 10 known for? It is known for its ability to use different types of drives at no limit. It is only important that all drives have the same architecture – i.e. all SAS or all SATA.


It is important to keep in mind that using drives with different performance levels will impact the overall performance of the RAID 10. The RAID will perform at the rate of the slowest drive in the array, changing the rate of the READ/WRITE operations.

What is RAID 10’s fault tolerance and how many disks can fail in a RAID 10?

RAID 10 allows for one or more drives to fail, depending on how many drives you have assigned for each set. Some divide their RAID 10 array into sets of two drives, but some use more sets. If you have divided your array into sets of three, you can lose up to two drives per set and still not suffer data loss. For sets of two, you can lose one drive per set.

In conclusion, you can only lose one drive per set without experiencing data loss.

When should I use RAID 10?

When should I use RAID 10 | TTR Data Recovery

What is RAID 10 best used for? It is ideal for mission-critical applications. When you need reliable storage for important tasks and functions, like accounting and financial systems, RAID 10 is a great option.

It is best for email applications, web servers, databases, and other tasks that require efficient disk performance.

It is not limited to important tasks though. As long as you have the budget for it, you can use the RAID 10 array for any use.

It is ideal if you require little to no downtime. It is the best RAID level available today for its efficiency and high fault tolerance.

What are the advantages of RAID 10 and what makes it the best RAID option?

  • Fast and resilient
  • Hardware-level data protection
  • Very secure because it uses mirroring and striping
  • Excellent redundancy
  • Safe for mission-critical applications
  • High fault tolerance
  • Replacement and rebuild time is very fast.
  • Most secure of all RAID levels
  • No maximum cap on the number of drives to use
  • High READ and WRITE performance

How safe is RAID 10? Is my data really secure?

How safe is RAID 10 Is my data really secure | TTR Data Recovery

What is RAID 10’s performance in regards to the safety of the data? It is high performing. In fact, it is the safest of all RAID levels.

It is safe regardless of the disk type, so expensive drives are not necessary.

Because data is both mirrored and striped, data blocks are much safer than other RAID options. Data blocks can be mirrored into a set of two or more. The more drives present in each set, the safer the data is.

As long as one drive remains functional in each set, there is no data loss when there is drive failure.

What is RAID 10’s ranking compared to other RAID levels and why is RAID 10 the Best?

RAID 10, it is hands down the best of all RAID levels available today. When it comes to speed, transfer of data, rebuild time, fault tolerance, etc., it is the best. It offers more benefits and advantages than setbacks.

The benefits outweigh the disadvantages.

How Much Faster is RAID 10?

RAID 10 performs at high speed. It increases speed through its striping and mirroring technology. This makes its READ and WRITE speeds fast.

For a drive size of 4000 GB and a total RAID capacity of 8 TB, RAID 10’s theoretical READ performance is four times faster. Its WRITE performance is estimated to be twice as fast. RAID 10 outperforms other RAID arrays.

Is RAID 10 better than RAID 5?

RAID 10 is definitely better than RAID 5. RAID 5 is deprecated. It is an outdated RAID technology that is hardly used today. It is not the safest RAID option.

RAID 10 overshadows RAID 5 in almost all aspects. It is better in speed, safety, and overall performance. Raid 10 requires little to no downtime during rebuild or replacement, unlike RAID 5 which takes days to rebuild and replace.

How to set up RAID 10:

  • Setup the drives you plan to use in the RAID and install them onto your computer. Let it boot into your Windows. We recommend Windows 10.
  • Type “Storage Spaces” in Search Windows.
  • Select “Create a new pool and storage space.”
  • Click on the drop-down menu under Resiliency. Select the RAID type. In this case, select “RAID 10” or the RAID 10 features which are striping and mirroring or anything to that effect.
  • Click on “size” and set the drive size. Usually, size is on default to the correct setting.
  • Select “Create Storage Space.”
  • When the process is completed, you will see the single disk with the correct size in Windows Explorer.
  • Type “Manage Storage Spaces” in the Search Windows to check the RAID 10 array.

What is the safest RAID configuration?

What is the safest RAID configuration | TTR Data Recovery

RAID 10 is the safest RAID configuration of all RAID technologies because it combines the best features of both RAID 1 and RAID 0. It takes speed and safety performance to the next level.

It offers hardware-level data protection so it is the best option for both mission-critical applications for businesses and home use.

Your RAID 10 array is an investment. But despite the cost, it is a worthy investment if you wish to have an efficient, secure, and fast data storage system with little downtime.


Consider using a RAID 10 for your data storage needs.

Your data is your business, your story, and your memories. TTR Data Recovery is your trusted leader in data recovery. Give us a call at (888) 328-2887. Our RAID server recovery services are available 24/7.

Tommy Kh | Ttr Data Recovery

About the Author
Tommy Khamoushi, Data Recovery Expert

Tommy Khamoushi is an IACRB-certified Data Recovery Engineer and a Certified Forensic Computer Investigator. He has more than 20 years of experience in data recovery including providing technical support for the House of Representatives.

Tommy leads a team of data recovery engineers and experts at TTR Data Recovery to recover highly sensitive data for government agencies like the National Aeronautics and Space Administration (NASA) and enterprise businesses using advanced and proprietary techniques and processes.

Connect with Tommy on LinkedIn.