What really happens when you delete a file permanently?
Where the deleted file really goes? How can you recover it and when you can’t? Know
the basic of deletion of the files, indexing! How does your file saved on
computer drive. This post is completely dedicated for this information.
Hi everyone,
welcome back to intelligent computing, in this post I am going to tell you few
basic things that makes you clear about the entire question I have put on the
first few lines of the post. How files and folders are saved on hard drive.
What really happens when you delete files from your computer? When can you
recover your deleted files and when you cannot get it back? How deletion work
and lots more questions are answered here.
Let’s Start with Hard drive
Hard drive is stack
of disk made up of magnetic material called platters. Each platter has
concentric tracks and each are divided into sectors. Each sector has cells
containing smallest storage unit called bit. Smallest units, i.e. bits can
either stay magnetize or stay demagnetize.
We can consider of
the state as 1’s and another as 0. This is how we save our data on hard drive.
What are computer files and folders?
Computer files or
digital files are nothing but information stored logically. Physically we can
say it is nothing but sequence of zeros and ones on the hard drive or say
sequence of magnetized or demagnetized bit.
It has one starting
address where we can refer that the files is stored and access.
Folders are small
files which contains the list of address of the files in it. Folders are like
small indexes which contain the list of information about the files stored
inside it.
When we delete or
say remove the list inside the folder list, it will say files is not present or
doesn’t exist.
How files are viewed and access
When you see a file
on computer, remember you are seeing the name of the file not content, this
means you are seeing the file name which is going to refer you to the address
where the files stored and refer you to the first bit of the file.
When you actually open
the file, you are viewing the content in it that means you are reading the
exact bit entries in the file.
On the outer side
of the disk, there are list of folders and files, that is list of small files
which will refer to each file entry on the drive.
What happens when you delete a file?
Suppose you are
about to find something in a book, you firstly look at the index, you don’t
find it in index, and you won’t read or open the books. No matter the thing you
are looking for it present inside or not.
Similarly, when you
can see the file name on your computer it means it refers you to the location
and computer has information that from location abc to location icr there exist
a file and I won’t allow new files to be stored there.
When you delete a
file, ever notice how quickly it happens. It only removes the entry from the
index. Yes computer removes the entry of those files from the list where it accesses
the file. That means now computer don’t have any information about the address
where the file is stored. It will think that space is free and we can now save
new files on this space.
What I want to tell
you is, hard drive still has that files but computer don’t have any idea of its
existence so you are not able to find the file once you deleted. But now you
know files are there.
How can you recover files when you have deleted
Files have deleted,
but actually only entries are omitted from the list, there are software which
can look for the files in location of your drive and get you the list of
information about the files. After that you can create your new index and get
access to files.
When you are not able to recover the files
Files are sequence
of 0s and 1s. Once the file have deleted you can recover it until new sequence
is not written on the place of deleted file location. That means, once you have
deleted files, you can recover it until, computer have written new files on it.
Once your older
file location is written with new files sequence, it’s impossible to find the
file. May be you can find the part of the files which is not affected but you
can’t get the whole file as it was.
You can always recover deleted file, get to
know it here.
Bottom Line
A deleted file resides there only until new
files are being written on the space allocated to older files which being
deleted. You can always recover files as usual if not overwritten and what
recovery software does is build index after scanning the hard drive.
I hoped you like the Information and share
this for your friends and make them expert as well. Have nice time to you all.
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