Data Recovery Labs is the leader in IT industry's RAID Data Recovery market providing in house data recovery services for all Redundant Array of Independent Drive (RAID) configurations, NAS, SAN, DAS and other multi-disk server configurations for all operating systems and storage media. One of the most catastrophic media failures that can occur in a business environment is that of a RAID or an enterprise server. We understand the critical nature of your data and offer risk-free RAID evaluations, state-of-the-art RAID repair tools, and excellent turnaround times through our media receiving and review centers in most states.

RAID 4 Uses


A RAID 4 uses block-level striping with a dedicated parity disk. The main advantage of RAID 4 is that each member of the set to act independently when only a single block is requested. Provided that the controller allows it, a RAID 4 set can service multiple read requests simultaneously. RAID 4 is similar RAID 5, however, it does not use distributed parity. RAID 4 is also often compared to RAID 3 with the biggest difference of striping at the block level, rather than the byte level. Generally, RAID 4 is implemented with hardware support for parity calculations, and a minimum of 3 disks is required for a complete RAID 4 configuration. RAID 4 is not a commonly used storage configuration and the main disadvantage of RAID 4 is its poor write transaction and aggregate transfer rates. It is also difficult and inefficient to rebuild data in the event of disk failure.


Because of our No Data, No Charge guarantee, you never pay any service fees if we cannot deliver the results you are looking for. Whether you lose data due failure of one or several RAID 4 member disks or failure not associated with the disks themselves, we provide the most effective ways to avoid permanent data loss. Contact one of our mass storage specialists today to learn more about the recovery process and to set up a FREE media evaluation.

Most Common RAID Failure Scenarios

  • Single or multiple drive failure resulting in RAID loss
  • RAID controller failure
  • Electronics Issues and PCB Damage
  • Hard drive firmware damage
  • Hardware conflicts and failures
  • Accidental reconfiguration of RAID drives
  • Accidental replacement of media components
  • File corruption and virus damage
  • Formatting, partitioning and user error

How To Best Handle RAID Failure

If any of your RAID disks indicate any signs of hardware damage – potentially, making mechanical noises – make sure to act quickly to prevent potential permanent data loss. First, shut down the RAID and do not make any attempt to repair damaged hard drives by running chkdsk, Scandisc or any other repair utilities or defragmenter utilities. These tools can exacerbate data loss issues of your array, greatly reducing the chances of a successful recovery. Keep the RAID powered off and contact a quality data recovery specialist.

If for any reason, you decide to attempt recovering the drive(s) yourself, first make sure to label the drives with their position in a RAID array. Do not replace a failed drive with a drive that was part of another RAID system and make sure to zero out the replacement drive before using.

Data Recovery Labs does not recommend any commercial data recovery software for RAID 0. Many commercial programs can decrease the chances of a successful data recovery by overwriting corrupted data. If your RAID 0 has mechanically damaged hard drives, running any type of software can cause permanent file loss.

We recover data from any hard drive RAID arrays made by but not limited to the following manufacturers:

Data Recovery Labs complies with all federal IT privacy laws, and by carefully controlling security and access to our facilities, always protecting our confidentiality of our clients.