Raid 5 Data Recovery

Don’t Hesitate When It Comes To RAID Recovery


We are using a FreeNas server system with a RAID 5 set of drives in an array, which recently crashed. After the crash, we immediately rebooted the array, and found that we were not able to access the data which is saved on the drives. When we went into Drive Management, we could see some of the files in the disks, but we are not able to extract them. When we try to click on them, the computer sends a message saying that the drive is not compatible with me request. As we didn’t know of any other solution to the problem, we tried to recover some of the data using a software program. We put in all the details of the array into the recovery program, but it seems as though it could not find the array, and no data was recovered. Some of that data is very important, and we need to be able to recover it quickly as the Raid 5 system contains business critical data.


I am using a RAID 5 array which is operated by the Intel controller from my PC. The array has been set up using 4 hard drives, and I use these drives to save and store data from the PC. This controller is directly linked to the BIOS, and I think this is the source of the problem, as I recently updated this system. I thought that it would help the computer to run faster, but in fact I seem to have lost the controller, and cannot now find all of the drives which are connected through the array. The PC is saying that only 2 of the 4 drives are available. The other drives are not located inside the array, and I can see these two drives on the end of the drives listed as available. When I click on those drives, they are both described as uninitialized, and I can’t open any of the files on the other two drives, as they are corrupted.

Don’t Hesitate When It Comes To RAID Recovery

RAID drives are very popular as data storage devices for companies as they offer large amounts of storage that is, in general, pretty reliable. When a RAID drive malfunctions however you may feel that you have lost everything when you find that you are unable to get to important information that is stored on there.

When you purchase your RAID system you should be aware of the different RAID architectures and configurations that are available. RAID 0 systems will stripe the data onto multiple drives. This is the least effective RAID system and the hardest to recover because there is no fault tolerance within the system. If two drives are used and one of them crashes and becomes inaccessible then you will lose access to all of your information. A RAID 1 system utilises mirroring, which essentially writes two copies of each file, one onto each of two RAID drives. This system is highly fault resistant, but it does not make the best use of the storage space available.

RAID 5 is the most popular RAID system as it utilises multiple disks, with at least three disks being required for the system to work properly. RAID 5 uses striping and parity information in order to utilise storage effectively and to add robustness to the system.

When a RAID system fails it is possible to attempt to recover the information that is on the damaged drive yourself, but this can all to easily turn out to be a false economy as there can be further problems caused during a partial rebuild in a RAID 5 system especially if the failure was due to a faulty controller card or operating system. There are also additional considerations that you have to take into account if attempting to repair a system yourself that include volume matching, configuration matching in order to avoid further, and more serious, disk failure.

There are also many cases where it is actually user error that causes the data on RAID drives to become inaccessible. Often these issues are caused by software and permissions issues and so access to the data can be restored to the drive by manipulating the software. Should the affected drive be physically damaged or the data on it corrupted beyond the software interface.

Therefore it would be in your best interest, in the event of a RAID failure, to immediately consult with RAID recovery specialists. They will be able to provide you with a quick initial assessment of your drives and will be able to provide you with a quote and projected recovery timescales in most cases.

Our RAID recovery specialists will create images of your disks so that they can perform the recovery without endangering your original disks. Also, we have such a high data recovery rate that if we are not able to recover your data, then we will not charge you for our services. So make us the first port of call if your RAID drives need recovering.