Data Recovery RAID 5

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

Systen RAID




25 years








Recover files RAID 5

We have unique technologies that allow us to recover data on RAID 5.

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

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

Although the RAID system is extremely safe, especially when we talk about RAID 5, it is not immune to failures that can cause data loss.

There are numerous problems that can cause data loss on RAID 5, such as configuration problems, logical problems and physical problems. Each of these can cause total or partial 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 controllers, we have the necessary know-how to recover data on RAID 5. Surely we are the Brazilian data recovery company more able to act in cases of data loss on RAID 5.

We operate for more than 23 in the market of data recovery, we are specialists in large corporate systems, we created the unit Data Center Recovery Services, 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 / HP, 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 processes and data recovery. The creation of technologies – many of which are proprietary and exclusive – has enabled Digital Recovery to remain at the forefront of RAID 5 data recovery. 

One of our technologies, called Tracer, is capable of delivering outstanding results in data recovery on 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 subsidiary in Germany. Other partnerships for the exchange of information and sharing of technologies 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 also operate 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 remotely assess and recover your data. If this is your case, 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. Important to mention that our NDA is already adapted for GDPR. Please speak to one of our experts about this.

Being fully aware of the existing levels of pressure and urgency in data centre and cloud computing environments, we also offer a 24×7 urgency service. This type of service provides our customers with the possibility of performing 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 attempt of data recovery, 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 5?

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.

Are there any specific recommendations for servers and storage in RAID 5?

Usually when problems occur with a RAID server, a long time may have passed when the server was configured and rarely remember the details of the configurations used.

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

To do this, contact our team of specialists. However, before performing the Rebuild procedure, it is necessary to be absolutely sure that the Array has not suffered any type of change, that is, the controller data and the order of the physical disks have not been modified. Otherwise there will be data overlapping.

How does RAID 5 parity work?

In a RAID 5 system with 4 disks:
  • All the information in 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 of disks 2, 3 and 4 will be stored in disk 1;
  • In the third block, the information of discs 3, 4 and 1 will be stored in disc 2;
  • In the fourth block, the information of disks 4, 1 and 2 will be stored in disk 3;
  • In the fifth block of RAID 5 the whole cycle begins again.
In this way the parity will be stored in all the disks at the same time. If one of the disks is damaged, the information of this disk that 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 will be the sum of the amount of disks minus 1. Because the system will use the space of one disk to store the parity.

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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 we have a total of 4 disks of 3 TB, ie, 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 an Array other 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 through specially written algorithms to rebuild the overlapped areas through data stored in the regions intended for parity (redundancy) 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.