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Home -> Clean Disk |
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Clean Disk-Why need to clean disk ?
Many people think that dropping a file into the Recyle
Bin and then emptying the Recycle Bin
is enough to get rid of a sensitive
file or program or graphic, etc. No,
it is not enough. The file is deleted
but not overwritten. When you delete a
file what actually happens is that the
OS removes the reference to the file
from the File Allocation Table (FAT).
This reference had the details such as
where on the disk the file was. So
when the Operating System does not see
this it marks that area of the disk as
free space? but we now know that only
the reference is removed, the data
physically remains on the disk. Even
though the data remains on the disk
the OS believes it’s not there, thus
the file remains on the disk until
another file is created over it, and
even after that it might be possible
to recover data by studying the
magnetic fields on the platter
surface. It could easily be recovered
using free or commercial software. One
thing you could do to make sure the
file cannot be recovered is wipe it
before you "delete" it. There are a
number of free and commercial programs
available for that purpose.
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Secure
Delete--Securely Deleting Files
You have known that deleted files can be recovered. Is
it possible to delete a file (and its associated files, temporary,
spooler, etc.) so that it cannot be recovered? There are rumors that
government agencies have the capabilities to recover data that has been
overwritten as many as 21 times. From a corporate perspective, an
individual will have to determine the value of his data and determine
the steps that can be considered "reasonable and practical" to prevent
proprietary data from being stolen or recovered by competitors or groups
intent on corporate espionage. The main premise for preventing data from
being recovered is to overwrite it. The question becomes how many times
should it be overwritten? There are individuals that believe that
overwriting data only one time is sufficient to prevent the recovery of
deleted files. However, the more the data is overwritten, the less
likely it becomes recoverable by any means. For a drive currently in
use, it is necessary to overwrite slack space and unallocated space.
Using Tracks Eraser Pro to Secure delete
files
Tracks Eraser Pro has a Secure Erasing option, with
which you can secure delete files. it overwrites files with blank
characters with a set number of times, so we are confident that once a
file is deleted by Tracks Eraser Pro, the file is gone forever, no one can
recover it.
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