Data loss results from the fact that the direcotry entries
and/or the FAT are deleted or contain incorrect information. |
The operating system
works at an access to files as follows: Read data from directory entry
-> Read data in the data area-> Read informationen from the FAT |
and repeat from next
to last step until file is completely read. If the directory entries and/or
the FAT are incorrect or deleted, the operating system can not read
however any longer, although this is still in the data area. This is the
reason why users think, their data is lost - in reality it is still
available for recovery. Finding this data can be very complex however somtimes, since
the entire drive has to be examined. |
Data loss of the content itself
Data is completely lost, if the content is damaged or overwritten (the
file was not lost due to incorrect information in the FAT or the directory
entries). |
|
This could have
the following causes:
- The
Hard disk/floppy disk is physically damaged
- Viruses
or something else destroyed the data
- Writing
other files to the disk has led to it, that some or all clusters of a
file were changed. In this case only a part of the data recovery can be
done.
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