No one can predict when data loss from a RAID will occur, but we know it can be catastrophic when it does.

If you suspect a RAID array failure, contact the experts at Ontrack to get your data back as quickly as possible.

Request a free estimate

Unparalleled expertise in RAID server data recovery

Recovering lost data from an enterprise RAID system is much more complex than from a simple hard drive.

Ontrack uses advanced techniques to repair, recover and reconstruct data that has become inaccessible. With Ontrack, you'll know exactly what data is recoverable before committing to the actual recovery. 

RAID data recovery experts

Trust the RAID server data recovery experts

Our engineers, backed by over 30 years of data recovery research, experience and development, have the knowledge and tools to get your data back.

We perform RAID data recoveries on:

  • Any RAID level
  • Any RAID controller, RAID architecture including Software Defined Storage (SDS)
  • Any hard drive type, make or model

Don’t see your RAID type listed here? Find out more about RAID recovery or call us for a free consultation about your specific setup.

RAID 51 

RAID recovery services

Whether your system has suffered physical damage or experienced a logical failure, we have a range of services to match your specific needs.

In lab

The best recovery option for any type of RAID system, for any situation. This recovery service is provided in our state of the art data recovery lab and specialist cleanroom environment to ensure the safety of your data.


Your data is recovered remotely without your media ever leaving your premises. We connect to your system via the Internet to perform a live recovery. Available when the storage device or system is still operational.


If your RAID system cannot leave your premises, our engineers can bring their recovery expertise to you. This option is only available for emergency service. For onsite data recovery, the storage device or system must be operational.


We offer custom designed recovery solutions for proprietary RAID systems and/or highly complex enterprise level systems. Our R&D team will work with your IT staff to create an emergency solution to retrieve your data.

Contact us to find out which option is right for you:

+44 (0)1372 741 999

Common causes of RAID data loss

Each RAID data recovery is unique, but there are a few common causes of data loss:

Human error

Whether it was by accident or malicious intent, data loss from reformatting, reinstalling or a volume overwrite can be overcome by expert data recovery engineers.

Power issues

RAID systems can be affected by loss of power, power cycling and power surges causing loss of data. RAIDs running in a degraded state are especially vulnerable, as power issues can cause out of sync drives to be reincorporated into the array. In these cases, we have the tools and expertise to map the data and logically rebuild the RAID in order to extract the required data.

Mechanical issues

RAID systems are built to withstand individual drive failure, but once a RAID is running in a degraded state, the workload of the remaining drives increases and so does the risk of additional drive failures. Additional drive failures can lead to failure of the RAID. We have the experience required to recover data from failed drives, combined with the logical skills and tools to rebuild and repair file systems from failed or partially rebuilt RAID systems.

Natural disasters

Fire, water, dirt and other contaminants from natural disasters can destroy a RAID array in an instant. Rebuilding file systems from a RAID affected by a natural disaster takes specialist facilities, knowledge and tools to decontaminate the drives and logically rebuild the data. Ontrack has state of the art tools and cleanroom environments to safely recover from physically damaged drives.

The different types of RAID

A RAID configuration, including the number of disks used, determines the type.

A RAID or ‘Redundant Array of Independent Disks' is a storage solution that distributes data across multiple disks that together form a single system. In addition to being less expensive, these devices have a high level of performance and fault tolerance through built in system redundancy.

Find out more
Types of RAID system

The data recovery process

From initial consultation to ongoing support, we help businesses and consumers in any data loss situation – from simple to the most complex and catastrophic.

When business or personal data is lost, we understand that it can be a very frustrating and stressful time. That's why our data recovery process is straightforward and transparent, and we'll keep you up to date every step of the way.

Join over a half million people and businesses who have trusted Ontrack to recover their data.

We'll collect your device and perform an evaluation, free of charge.

Data recovery for single drives and smartphones starts from £478.80 (inclusive of VAT). The final price will be determined at the end of the evaluation, according to the complexity of the work involved and the urgency required.

To begin, start by clicking on the type of media from which you need data recovered. The evaluation time for single hard drives (HDD and SSD) is four hours*, and within 24 hours for RAID systems*. Other media, such as mobile phones do not require an evaluation to provide an accurate quotation.

*These are typical time frames and apply within normal business hours (Monday to Friday, 9am to 5pm). For an out of hours, emergency service, or for further assistance, please contact us on +44 (0)1372 741999.

Step 1

Device Type
Step 2

Data Loss Reason
Step 3

Details & Evaluation

What type of device do you need data recovery for?

What is the main reason for your data loss?

What data is most important to you? Additional comments?

* The free evaluation may not be possible. Please contact us or enter your details and we will contact you as soon as possible. In case of assistance please call: +44 (0)1372 741 999

1. Contact details

2. Shipping details

Would you like to start your FREE evaluation?:
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By submitting this form you acknowledge that:
  • The free evaluation will be completed by KLDiscovery Ontrack Ltd (trading as Ontrack), Nexus, 25 Farringdon Street, London EC4A 4AB.
  • If you choose not to go ahead with the recovery after the evaluation, and would like your device returned, we will ship back to you for £9.60 (inc. VAT) for UK mainland shipping (next day service). Other delivery costs may vary. If you choose to go ahead and we cannot recover your data, we will return your device free of charge. Alternatively, we can securely destroy your media.
  • You authorise Ontrack to begin the evaluation immediately. During the free evaluation, you can cancel at any time. If you are a consumer and place an order, you have a period of 14 days in which to cancel the Order but you acknowledge that your right to cancel will be lost if Ontrack completes the evaluation before your notice to cancel is received. Full details for cancellation and your rights are set out in our Terms and Conditions. In order to cancel, please email or call Ontrack using the contact details provided or use the model cancellation form on our website.

For information on how we collect, process and retain your personal data, please see our Privacy Policy.