data retrieval

Data recovery firms are missing out on data they could retrieve with the complete 3D Data Recovery process. Proper data recovery involves three phases: drive restoration, disk imaging, and data retrieval. But data recovery professionals can face frustrating problems when imaging a damaged disk. The drive may repeatedly stop responding in the middle of copying data. The drive may fail completely because of the stress caused by intensive read processes. Significant portions of data may be left behind in bad sectors.

These issues plague firms that use traditional disk imaging methods. Read instability makes it difficult to obtain consistent data quickly, and system software is not equipped to read bad sectors. However, these problems can be solved with imaging tools that address disk-level issues.

Imaging software bypasses system software and ignores error correction code (ECC), processing each byte of data in bad sectors. Inconsistent data is evaluated statistically to determine the most likely correct value. Faster transfer methods speed up the process, and customizable algorithms allow the data recovery professional to fine-tune each pass. Imaging software provides feedback on the data recovered while imaging is still underway.

Imaging hardware can reset the drive when it stops responding, which minimizes damage from head-clicks and allows the process to run safely without supervision.

1.Drive Restoration: Damage to the hard disk drive (also referred to as HDD) is diagnosed and repaired as necessary. There are three main types of damage:

• Physical/mechanical damage: Failed heads and other physical problems are often repaired by replacing the damaged hardware with a donor part.
•  Electronic problems: Failed printed circuit boards (PCBs) are replaced with donor PCBs, and the contents of the failed PCB read-only memory (ROM) are copied to the donor.
•  Firmware failure: Firmware failures are diagnosed and fixed at the drive level.2.Disk Imaging: The contents of the repaired drive are read and copied to another disk, Disk imaging prevents further data loss caused by working with an unstable drive during the subsequent data retrieval phase.Drives presented for recovery often have relatively minor physical degradation due to wear from normal use. The wear is severe enough for the drive to stop working in its native system. However, imaging software can work with slightly degraded drives, so part replacement is often not required. In these cases, the data recovery process can skip drive restoration and start with disk imaging.3. Data Retrieval: The original files that were copied onto the image drive are retrieved. Data retrieval can involve these tasks:
• File system recovery: The recreation of a corrupted file system structure such as a corrupted directory structure or boot sector, due to data loss.
• File verification: Recovered files are tested for potential corruption.
• File repair: If necessary, corrupted files are repaired. Files might be corrupt because data could not be fully restored in previous phases, in which case disk imaging is repeated to retrieve more sectors. File repair is completed, where possible, using vendor-specific tools.Drive restoration and data retrieval, the first and last phases, are well-serviced by the data recovery industry. Many data recovery companies have the necessary software, hardware, knowledge, and skilled labor to complete these phases. However, the technology for effective disk imaging has been relatively neglected because of its challenges, making it a weak link in the data recovery process. Data recovery firms that skim the surface with traditional imaging methods often miss out on potential revenue.