Data loss occurs due to two types of causes: Logical issues and Physical issues. Data loss may also occur due to various other reasons like cabling issues, user error, malicious intent (commonly termed as sabotage), vandalism etc. So, you need to understand these problems first. However, in both types of data loss scenarios, unavailability of valid data backups requires Data Recovery Tools to recover lost data.
Logical Data Loss
Logical data loss occurs when software related errors affect data integrity and system hardware remains fine. It occurs due to damage of logical components like file system, operating system etc. The reasons of logical data loss are:
- Invalid directory entries
- Corruption or deletion of file system table
- Damage of integral file system metadata structure
- Unintentional deletion
- Operating system crash
- Accidental partition/volume formatting
Data can be recovered in all the above cases, unless it has not been overwritten. Operating system uses referencing provided by file system table to locate a file in the data area. This file entry points towards the location, where a file is actually stored. But when any of the above incidents take place, operating system can lose the capability to locate information. It is due to the fact that corresponding file entry gets deleted, though original file remains safe in the data area of the file system. That’s why users think that their precious data has got lost. However, locating and recovering data in such cases is complex but it is possible. The key to such daunting problems is provided by Data Recovery software, which can safely scan affected drives and recover lost, deleted or formatted data.
Physical Data Loss
Unlike logical data loss, physical data loss occurs when hard disk suffers physical damage to extent of data inaccessibility. A hard disk consists of several moving components and electronic circuitry. The reasons behind physical data loss are:
- Read/write head crash
- Spindle motor damage
- Spindle twisted or bent
- Actuator crash
- Head arms damage
- Water/fire damage
- Platters misalignment
- PCB (Printed Circuit Board) malfunction
In these cases, Data Recovery is possible, unless there hasn’t been any physical harm to the platters or their magnetic material. The physical functioning of hard disk is dependent upon its internals. However if any of these components experience failure, data remains intact on the hard drive platters. To recover the inaccessible data, you need to get the damaged hard drive internals (viz. read/write head) repaired or replaced as per the case. The process involves implementation of several advanced and modern component level techniques that involves isolating hard drive platters from environmental factors like heat, humidity, dust particles etc. All these requirements are fulfilled by drive recovery service which is provided by experts. The hard drive recovery professionals extract optimum amount of inaccessible data from physically failed hard drives.
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