RAID 10 Data Recovery

Even with a heavily-redundant nested RAID, your server can still crash. Whenever your server crashes, you’re in for a bad time, but Murphy’s Law always seems to be fully in effect, and it’s likely to happen at the worst possible moment. Fortunately, if a RAID 10 server crash catches you off-guard, and puts your organization in jeopardy, we can save you a lot of trouble. Gillware Data Recovery offers expert RAID 1o data recovery services.

RAID arrays such as RAID-10 are typically used in servers and NAS devices. Gillware is ready to assist you with your RAID 10 data recovery needs.
RAID arrays such as RAID-10 are typically used in servers and NAS devices. Gillware is ready to assist you with your RAID 10 data recovery needs.

What Is RAID 10?

RAID 0 and RAID 1 make up, on their own, the simplest RAID levels. RAID 0 breaks up all of the data written to its disks into stripes. These stripes are usually 32 to 64 kilobytes in size. Any file larger than the stripe size gets broken up into pieces. RAID 0 creates a single volume as large as the combined capacity of all of the hard drives in the array. However, there is no fault tolerance whatsoever. If one hard drive goes down, the entire RAID array goes down with it.

RAID 1 usually only uses two hard drives. The RAID controller takes any changes made to one hard drive and copies them over to the other, making the contents of both hard drives exact duplicates of each other. If one hard drive fails, the other immediately takes its place. RAID 1 provides fault tolerance, but offers no increased capacity.

RAID 10, also known as RAID 1+0, combines RAID 0 and RAID 1 to offer the features of both configurations. Data is not only striped between multiple hard drives, but mirrored to an equal number of hard drives. This results in a nested RAID array with both increased capacity and fault tolerance, like RAID 5 or RAID 6.

RAIDv 10 seems like a huge improvement over RAID 5 and RAID 6. No matter the size of the array, you can, in theory, lose up to half your hard drives without having to deal with a RAID-10 crash. It seems quite unlikely you would ever need RAID 10 data recovery services. But RAID 10 isn’t quite that reliable in practice.

RAID 10 vs RAID 6

Take, for example, a simple, hypothetical four-drive RAID array combining RAID 0’s striping with RAID 1’s mirroring. Despite having four hard drives, you only have two drives’ worth of usable capacity. But at least you have the peace of mind of knowing you can lose two hard drives and keep going, right?

Wrong. You could lose half of your hard drives and not even notice—as long as you only lose the right two drives. If you lose two drives that contain both a set of “original” data and its mirrored copy, it’s game over. In this hypothetical four-drive RAID 1+0 setup, there are six possible combinations of two drive failures in this array, two of which result in the RAID array failing. You have a 33% chance of two drive failures causing a RAID 10 crash.

RAID-10 vs RAID-6 comparison
A comparison of a simple four-drive RAID 1+0 array and a four-drive RAID 6 array. If the right two drives fail in the RAID 1+0 array, you could lose all of your data. If any two drives in the RAID 6 array fail, your data will still be perfectly safe due to the double layer of XOR and Reed-Solomon parity data.
As you add drives to a RAID-10 array, the chance of two drives causing your array to fail decreases. However, RAID-6 still offers greater capacity and fault tolerance.
As you add drives to a RAID 10 array, the chance of two drives causing your array to fail decreases. However, with RAID 6, the probability of two drive failures crashing your array is still zero, no matter how many drives you have

Contrast this with RAID 6. RAID 6 works very similarly to RAID 5, but has an extra layer of parity calculations. The extra parity takes up another disk’s worth of space, spread across the disks in the array.

So, what if you take the four drives in the hypothetical RAID array and configure them in a RAID 6 array instead? Your RAID controller has to do some extra parity computations every time you write data, resulting in a bit of a performance hit. However, keep in mind that computers are really good at doing math, and doing it really quickly. It was their original raison d’être, after all.

Due to the way both parity layers are spread across all four hard drives in the RAID 6, you could lose any two drives before you have to start worrying about a RAID-6 crash. Our CEO Brian Gill recommends RAID-6 over RAID-10 for this exact reason.

The RAID 10 Data Recovery Process

So, how do our data recovery technicians here at Gillware Data Recovery recover data from a failed RAID 10 array?

Free Evaluation of Your Failed RAID 10 Array

As is our policy, the first thing we offer you here at Gillware is a totally financially risk-free RAID 10 data recovery evaluation. If you live in the continental United States, we are even happy to offer you a prepaid UPS shipping label to get your crashed RAID 10 array to us at no cost to you.

It’s important to send all of the drives in the array, including any hot spares. The RAID enclosure, controller card, and other hardware components, however, are completely unnecessary. Our RAID data recovery experts use custom software to emulate the RAID controller.

Once your crashed RAID 10 array has been evaluated, we present you with a price quote for data recovery and our predictions for the case results. This is not a bill; we only need your promise that you are comfortable paying for our data recovery efforts in the event that we recover the data you need. We only continue on with the RAID 10 data recovery work if you approve our price quote.

Independent Analysis of the Hard Drives in Your Failed RAID 10 Array

Our data recovery experts assess the health of every hard drive in your crashed RAID 10 setup and make repairs to the drives’ electrical components, internal components, or firmware as needed, and use our proprietary data recovery software HOMBRE to create full forensic write-blocked images of all the drives in the array. These images are contained on our internal customer data drives, which are never allowed outside our facility and are zero-filled according to Department of Defense standards after your data recovery case has been completed.

Determining the Physical Geometry of Your Failed RAID 10 Array

RAID 1+0 and RAID 0+1 arrays are complex RAID arrays. Essentially, they are two RAID configurations stacked on top of each other. Using HOMBRE’s relational database and the metadata contained on each hard drive in the failed RAID array, our RAID 10 data recovery technicians can puzzle out the way the hard drives in your RAID 10 have been arranged. After determining the striping size, striping pattern, data offset, and the order of the drives in the array, our engineers begin to have a clear picture of the lost data in the array.

Reuniting You with Your Data

After rebuilding the failed RAID 10 array with our disk images, our engineers analyze the recovered data, with the help of HOMBRE. We make as certain as we can that there is as little file corruption as possible and that your most critical data is functional.

We only bill you for our data recovery efforts after we’ve successfully recovered your data. Upon payment, we extract your recovered data to a new, healthy hard drive with hardware-level encryption for your security and ship your data back to you.

Why Choose Gillware for RAID 10 Data Recovery?

Our RAID 10 data recovery staff are experts in their field. Our technicians have logged thousands of man-hours of data recovery experience and have dealt with just about every RAID setup under the sun. We’ve done things our competitors have told their customers were impossible. We’ve done things our competitors have said were possible at lower prices than those same competitors charge their customers.

We here at Gillware stand by our engineers’ skills and our financially risk-free RAID 10 data recovery services. If we can’t recover your critical data at a price that works for you or your organization, you don’t owe us a dime.

Still not convinced? Check out some of these case studies for RAID 10 data recovery.

RAID-10 Recovery

RAID-10 Recovery Case Study: Failed Virtual Disk

The client in this RAID-10 recovery case study came to us after their Dell RAID-10 ...

One of the Constellation SAS drives from this Dell PowerVault recovery case

Dell PowerVault Recovery Case Study: Lost RAID Configuration

In this Dell PowerVault recovery case, the client came to us after their Hyper-V host ...

Why choose Gillware Data Recovery?

Gillware’s data recovery services are affordably priced, technologically innovative and completely secure.


Best-in-class engineering and software development staff
Gillware employs a full time staff of electrical engineers, mechanical engineers, computer scientists and software developers to handle the most complex data recovery situations and data solutions

Strategic partnerships with leading technology companies
Gillware is proud to be a recommended provider for Dell, Western Digital and other major hardware and software vendors. These partnerships allow us to gain unique insight into recovering from these devices.

RAID Array / NAS / SAN data recovery
Using advanced engineering techniques, we can recover data from large capacity, enterprise grade storage devices such as RAID arrays, network attached storage (NAS) devices and storage area network (SAN) devices.

Virtual machine data recovery
Thanks to special engineering and programming efforts, Gillware is able to recover data from virtualized environments with a high degree of success.


SOC 2 Type II audited
Gillware has been security audited to ensure data safety, meaning all our facilities, networks, policies and practices have been independently reviewed and determined as completely secure.

Facility and staff
Gillware’s facilities meet the SOC 2 Type II audit requirements for security to prevent entry by unauthorized personnel. All staff are pre-screened, background checked and fully instructed in the security protocol of the company.

We are a GSA contract holder.
We meet the criteria to be approved for use by government agencies

GSA Contract No.: GS-35F-0547W

HIPAA compliant
Our entire data recovery process can be handled to meet HIPAA requirements for encryption, transfer and protection of e-PHI.


No obligation, no up-front fees, free inbound shipping and no-cost evaluations.
Gillware’s data recovery process is 100% financially risk free. We only charge if the data you want is successfully recovered.

Our pricing is 40-50% less than our competition.
By using cutting edge engineering techniques, we are able to control costs and keep data recovery prices low.

Instant online estimates.
By providing us with some basic information about your case, we can give you an idea of how much it will cost before you proceed with the recovery.

We only charge for successful data recovery efforts.
We work with you to define clear data recovery goals for our technicians, and only charge you upon successfully meeting these goals and recovering the data that is most important to you.

Gillware is trusted, reviewed and certified

Gillware has the seal of approval from a number of different independent review organizations, including SOC 2 Type II audit status, so our customers can be sure they’re getting the best data recovery service possible.

Gillware is a proud member of IDEMA and the Apple Consultants Network.

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