Data Recovery

We have developed unique solutions that can recover data on RAID 5

Systen RAID




25 years








Recover RAID 5

We can handle any data loss scenario in RAID systems.

Over many years we have accumulated the necessary knowledge to recover RAID 5 in any data loss scenario.

RAID 5 is the evolution of the previous RAID systems (RAID’s 0, 1, 2, 3 and 4), it combines the security of RAID 1 with the performance of RAID 0, this makes RAID 5 one of the most widely used RAID levels around the world.

Although RAID is extremely secure, especially when it comes to RAID 5, it is not immune to failures that can cause data loss.

There are numerous problems that can cause data loss in RAID 5, such as configuration problems, logical problems and physical problems. Each of these can cause partial or total downtime.

The most recurrent configuration problems are: Deletion or change in RAID controller settings, deletion or change of array volumes, loss of sequential order of disks.

Most common logical problems are: Deletion or corruption of data on partitions, formatting drives or partitions, overwriting information, problems booting the system, and others.

The most common physical problems are: RAID controller burnout, electronic circuitry burnout, read head burnout or breakage, disk surface damage, natural media wear, motor burnout, firmware problems, among many others.

In all these scenarios described above, our specialists are able to act, we have positive results in the main problems presented in RAID 5.

Why Digital Recovery?

Through reverse engineering and full understanding of the algorithms used in RAID 5 controllers, we have the necessary know-how to recover data on RAID 5.

We have been working for more than 23 years in the data recovery market, we are specialists in large corporate systems, and created the Data Center Recovery Services unit, in this department we recover RAID systems (0, 1, 10, 5, 50, 6, 60, vRAID, RAID-Z and JBOD), Storages (NAS, DAS and SAN) with Host Channel iSCSI, SAS and FC (Fibre Channel) from various manufacturers such as HP/HPE, Dell/EMC and IBM/Lenovo, Databases (Microsoft SQL Server, Oracle, MySQL, PostgreSQL, MariaDB, Firebird, DB2, Informix, Caché and Btrieve) and virtual machines (Microsoft Hyper-V, VMware, Citrix XenServer, Proxmox and Acrópolis).

We have developed software and hardware technologies that enable us to act with precision and agility in advanced diagnostic and data recovery processes. The creation of technologies – many of them exclusive and proprietary – has kept Digital Recovery at the forefront of data recovery on RAID 5. 

One of our technologies, called Tracer, is capable of delivering outstanding results in data recovery from Virtual Machines, Databases and RAID systems. Through millions of calculations and analysis of millions of records, this technology makes it possible to drastically reduce the execution time of projects, as well as increase success rates to almost 100%.

We are a Brazilian company with a branch in Germany. Other partnerships for information exchange and technology sharing are made between companies in countries such as the United States, Russia, and Ukraine.

In addition to providing services to governments, financial institutions, and small, medium, and large companies, Digital Recovery also provides services to other companies that are also active in the area of data recovery.

If your data is stored on a device located outside of the countries where we have labs, we have the technology to enable us to assess and recover your data remotely. If this is the case for you, please consult our department 24×7.

Should you need it, we can also provide you with a Non-Disclosure Agreement (NDA) in a language of your choice. Please talk to one of our experts about this.

Being fully aware of the existing levels of pressure and urgency in data center and cloud computing environments, we also offer a 24×7 urgency service. This type of service provides our customers with the ability to perform services 24 hours a day, 7 days a week, 365 days a year.

If you have received a negative diagnosis from competitors or internal IT department, we can perform last ditch data recovery attempt, Digital Recovery’s team of experts can work with you to reverse the data loss scenario, we are experts in RAID 5 recovery.

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Answers from our experts

What are the main reasons that cause data loss on RAID 0?

The main problems that lead to data loss in RAID 5 are:
Configuration Problems:

  • Loss of Array data;
  • Deletion or Change in RAID controller settings;
  • Exclusion or change of Array volumes;
  • Loss of the sequential order of the disks;
  • Logical Problems:
  • Deletion or corruption of data on partitions;
  • Formatting drives or partitions;
  • Overwriting information;
  • Formatting followed by reinstallation of systems;
  • Problems booting the system;
  • Dissynchronization of data from one hard drive to another.

Physical Problems:

  • Burning or problems occurring in the RAID controller;
  • Burnout of electronic circuits;
  • Burnout of read heads;
  • Breakage of read heads;
  • Damage to the surface of the disks (HDD platters):
  • Bad Blocks – Defective Sectors;
  • Natural wear of the media;
  • Scratches and scratches surface;
  • Scratches and scratches serious;
  • Locked motor bearings;
  • Motor burnout;
  • Problems caused by falls or impacts;
  • Problems related to the Servo Mechanism area;
  • Firmware problems;
  • Problems with water or other liquids.

Will replacing the RAID controller bring my data back?

Usually when problems occur with a RAID server, it may be a long time since the server was set up and you rarely remember the details of the settings used.

If the system type is RAID 5 (with redundant disks) and there is a problem with only one of the disks, you can try to replace the disk that is having problems and perform a Rebuild (procedure to rebuild the data from the damaged disk).

To do this, please contact our team of experts. However, before performing the Rebuild procedure, you must be absolutely sure that the Array has not been altered in any way, that is, the controller data and the order of the physical disks have not been modified. Otherwise there will be data overlap.

Can I preselect the most critical files to be recovered first?

In a RAID 5 system with 4 disks:
  • All information from the first block of disks 1, 2, and 3 will be stored in the first block of disk 4;
  • In the second block, the information from disks 2, 3 and 4 will be stored on disk 1;
  • In the third block, information from disks 3, 4 and 1 will be stored in disk 2;
  • In the fourth block, information from disks 4, 1 and 2 will be stored on disk 3;
  • In the fifth block of RAID 5 the whole cycle starts over again.
In this way parity will be stored on all disks at the same time. If one of the disks is damaged, the information from this disk, which is contained in the parities recorded on the other disks, will be used to reconstruct the data on the new disk that will be placed in place of the damaged disk. For your knowledge: When creating a RAID 5 system, the available space is the sum of the number of disks minus 1. Because the system will use the space on one disk to store the parity.

Latest insights from our experts

What you need to know

Regardless of the number of disks that will be allocated in the array, the system will use the space equivalent to one disk for parity, ie, to get the net space, just multiply the capacity of the disks by the number of disks subtracting one.

Example | Considering 5 disks of 3 TB each, totaling 15 TB of raw space.

Subtracting one disk gives us a total of 4 disks of 3 TB, i.e. 3 TB x 4 = 12 TB

A RAID 5 with 4 HDDs or SSDs can have over 1000 different combinations of data access. If these combinations are modified or lost, data loss will inevitably occur.

If any attempt to rebuild the data through the REBUILD process is made with a different Array than the original, overwriting will occur.

If this has already happened, we recommend to stop everything and contact our technical support. It is still possible to recover RAID 5 using specially written algorithms to reconstruct the overlapped areas using data stored in the parity (redundancy) regions of the RAID Array.

Yes, in many situations it is possible to recover data from a RAID server or storage remotely. For more information about this recovery modality, please contact us through our support channels, which are available 24x7x365.