Data loss is a situation when you cannot access the data and files or the device on which the data is saved. In that case, you would require data recovery services in order to get back your precious data and do a system restore. There are two main reasons for data loss i.e. logical or physical failure of the device on which the data is stored. Let us understand each of them.
Data loss reasons
- Logical failure – This kind of data loss occurs mostly in traditional as well as modern hard disks. If this is the case then the drive will show under the BIOS menu or Disk management settings but you will not be able to access it. Logical hard drive failure can be caused due to register damages, OS failure or file system corruption. Due to this the content present on the drive will not be accessible to the user. In this case, the internal structure of the drive is not damaged and hence there are better chances of data recovery. You can seek help from data recovery programs or take professional help from experts to restore data from inaccessible devices.
- Physical failure – this is the permanent failure of the hard drive which comprises of physical damage to the equipment. After this kind of failure the access to the storage device is restricted and if you want to get back your precious data then you would need help from data recovery experts.
How does data recovery work?
Data is stored on the hard drive platters that are created using metal oxide. These platters spin at the rate of 800 to 1500 RPM and the hard disk also has read-write actuator arms that can read or write the data at very close distances along the surface of the platters. If the arms or platters are damaged or fail then it leads to a permanent damage to the data stored on it and it will be non-recoverable. With an increase in demand of the storing capacity, now hard disks are manufactured that can compress more data within a smaller surface of the hard disk which makes the process of data recovery complex and time consuming too.
Once the data is deleted, it might not be permanent and it exists on the storage device which can be recovered later using proper tools by experts. The process includes a powerful algorithm to scan the device and list all the entries that have been marked as deleted. It collects data from master boot record and then the user can recover it.