How do I recover lost data from a hard disk?
Recovering lost data from a hard disk can be simple, provided you understand the source of the problem. Whether it’s an external hard drive, a desktop PC or a home computer, in most cases it’s possible to restore lost files by adopting the right reflexes.
Lost hard drive data: what to do?
While damage to an external hard disk or the accidental deletion of files leaves little doubt as to the situation, data loss can in some cases go unnoticed… Understanding the origin of the problem will therefore be decisive.
1- Plan ahead by regularly backing up your data
Backing up your data on a regular basis helps you anticipate losses caused by breakdowns, disasters, human error, computer attacks and so on. There are many solutions to suit your needs, your business and your data volumes: NAS/SAN servers, RAID systems…
2- Detecting data loss on your hard drive
An abnormal absence of data on your hard disk can go unnoticed for a long time, especially if the data is neither processed nor requested. Data is considered lost if :
- inaccessibility of data on the medium ;
- data corruption or degradation ;
- overwriting or deleting data.
3- Diagnose the cause of data loss
Any operation to restore lost data from a hard disk or external hard drive depends on the circumstances of the loss:
- human manipulation: unintentional deletion, overwriting or formatting…
- cybercrime and computer malware: viruses, hacking, ransomware…
- logical failure: malfunction resulting in formatting, repartitioning, etc.
- malfunction of the hard disk’s electronic or mechanical components…
How do I recover lost data from a hard disk?
In most scenarios, recovering lost data from your hard disk requires the right gestures. While restoring a file from the Recycle Bin or using the Ctrl + Z command are easy, it’s advisable to :
- in the event of a logical failure, do not perform any software operations on the hard disk or external hard disk (CHKDSK or Scandisk, formatting, recovery software, etc.).
- in the event of mechanical or electronic failure, cease all use of the drive and do not attempt any work on its components (opening the drive, disassembly, etc.).
- in the event of computer malware, to contact a laboratory of experts directly, especially if your data is critical and the risk of contamination of your IS is high.
- dans l’ensemble des cas :
- adopt the classic precautions for a normal hard disk failure.
- contact a data recovery laboratory if in doubt.
