Can Deleted files be retreived??? « Nivedita’s Weblog

Can Deleted files be retreived???

November 28, 2007 at 11:46 am | In Security | 5 Comments

Deletion of File:

Deletion are of two types:-

there are two ways by which we delete files….

* By pressing Delete Button on the keyboard or by selecting the pose of file or brochure and deleting it.. In this file is traveled to the recycle bin.

* By pressing Shift + Delete together or not allowing the file to pertain in recycle bin.

Here the Windows help menu will tell you that “Deleting an item from the Recycle Bin permanently removes it from your computer.”

So we all are under the misconception that the file is completely deleted. But the answer is “NO” …

Our storage device i.e. hard drive is logically separated into two component parts by the operating system. In one component data is stacked and in the other component its computer address is stacked . When we delete the data then operating system updates a flag in the computer address component of the hard drive which do the operating system acknowledge that the following file is deleted. Now the truth, that data is still there in the hard drive. It is, however, relatively easy to retrieve deleted files with the right software.

Way to Erase File Completely:

The only way to completely erase a file with no trace is to overwrite the data. The operating system will eventually overwrite files that have no pointers in the directory tree structure, so the longer an unpointed file remains in the hard drive the greater the probability that it has been overwritten.
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5 Comments »

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Really good article….

quite informative.surely i will now try to overwrite the files if possible.

but i hav got a doubt

Suppose i hav a harddisk of capacity 20GB.i keep on erasing and adding new files constly,which i think will croos even the 20Gb capacity.then how can those be saved?
will the harddisk space reduce after constant usage?

Comment by gaurav — November 28, 2007 #

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if ur harddisk is full u cant save any thing.. but i stil dint get ur ques..

Comment by niveditaswaminathan — November 28, 2007 #

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Hey nive ur blog were just like turning pages in my computer architecture book. Really gud yar…
keep going

Comment by Vidhya — November 28, 2007 #

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A software for forensics is said to be capable doing full analysis of data which has beeen overwritten. This “unusual” software is available for police or other organization with massive budget. If I have my file deleted I will use just an ordinary “undelete” software available out there. I ever got my data overwritten but my norton disk edit still can recover some part of it (with hard work though).

Comment by fandigunawan — November 28, 2007 #

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thank u tat u dint tel tis 2 my parents else i’ll b in trouble….

Comment by prasanna — January 12, 2008 #

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