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Contents > Product Overview
1.2. Overview of Restoring Deleted Data
No one wants to lose vital data stored on a hard disk. To ensure
the integrity of data, backup copies can be the best line of defence.
When the unthinkable happens, and data cannot be seen from the
operating system, another route must be taken to retrieve lost data.
Table 1-2, below outlines the main causes of data loss, showing the
frequency of occurrence:
Table 1-2 Common Causes of Data Loss
|
Cause
|
Chance |
|
Accidental removal of files and folders and then emptying
Recycle Bin |
~ 75% |
|
After physical damage of critical sectors on HDD ("bad
clusters") some drives become unreadable |
~ 6% |
|
Loss of information due to a power failure or power surge |
~ 5% |
|
Deletion of logical drive or partition itself then recalling
important data on it |
~ 3% |
|
Damage of MBR, Partition Table, Volume Boot Sectors by virus |
~ 3% |
|
Other |
~ 8% |
When the above cases are assessed, the situation boils down to two
states:
- Individual files or folders have been deleted or overwritten and
the drive partition or physical drive can still be displayed by the
operating system
- The partition table is deleted, damaged or overwritten and
physical drives or logical drives become invisible to the operating
system
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