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Ccleaner Wipe MFT Free Space ?


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#1 softeyes

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Posted 26 November 2014 - 12:40 AM

Hello, I hunted for the correct forum to post..apologies if I'm in the wrong place!

 

Updated Ccleaner today and found in the Advanced options "Wipe MFT Free Space C drive."

Of course I ticked it!  Free space, needing a wipe means to me that cobwebs might have grown there?

 

Opinions or advice about this Ccleaner setting?  Good/bad? 

 

Mucho thanks! :flowers:



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#2 Platypus

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Posted 26 November 2014 - 03:03 AM

The MFT is the Master File Table which contains the identifying information used by the file system to manage file storage. When files are deleted, details like the location of the file's prior contents (and sometimes a small component of the file's actual contents) remain for an indeterminate period of time in the MFT.

 

Much like the file data locations themselves, the MFT entries are released and become available for re-use, but until they get used again for other files, the information they contain can be accessed to gain information about the deleted files. This is the first line of approach used by file recovery programs, so in some situations it could be viewed as a security risk, enabling private or sensitive information to possibly be recovered after file deletion.

 

So wiping the MFT free space will erase any remaining information in the previously used MFT records that are awaiting re-use. If you wish to be extra secure about deleted files being completely gone, then you can choose the MFT free space wipe. But keep in mind it will make recovery of an accidentally deleted file far more difficult after applying the action.


Edited by Platypus, 26 November 2014 - 03:04 AM.

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#3 Beel

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Posted 26 November 2014 - 03:10 AM

http://www.howtogeek.com/113382/how-to-use-ccleaner-like-a-pro-9-tips-tricks/

 

Wiping free space takes quite a while. I do it once every few months.



#4 Platypus

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Posted 26 November 2014 - 03:20 AM

Yes, wiping free space is quite intensive, as it overwrites the entire free space (unallocated data area) of the drive, e.g. on a half full 2TB drive, 1TB would be wiped. An MFT free space wipe is only concerned with the inactive record locations within the Master File Table.


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#5 quietman7

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Posted 26 November 2014 - 06:14 AM

The Drive Wiper tool screen under Tools section was initially added in v3.00.1310 (03 Nov 2010) but they have made various improvements since then. v5.00.5050 includes many performance improvements and bug fixes.

BTW...CCleaner has their own section on FAQS and How to's

Using CCleaner: Wiping free disk space
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#6 softeyes

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Posted 26 November 2014 - 11:41 AM

I sure appreciate all who replied and your in depth information! It's 👍 for me!

QM7-- BC is just so trusting with all of you experts, although reading the Ccleaner info. I so value the trusted response from you valued volunteers!

With appreciation. Miss Clean!

#7 quietman7

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Posted 26 November 2014 - 01:24 PM

You're welcome on behalf of the Bleeping Computer community.

We appreciate your thoughtful comments and taking the time to express your sentiments.
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#8 UncleXNL

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Posted 22 February 2016 - 10:19 AM

OK to understand the CCleaner clear free space option it is important to understand how your computer deletes files. The computer NEVER deletes files, instead it sets the file's deleted bit to TRUE. Now the file is still on disk, but the free space could be overwritten. Until that happens any undelete tool can recover the file in a second. While files are in the recycle bin, the same happens only your file cannot be overwritten, and you can "magically" return the file. This is much faster than overwriting the file with zero's. In the computer registry you can set the MFT size, I have set mine to the biggest since it is a development PC. I have lots of small file, so many small (source and library files) in fact on a 500GB drive even with the biggest MFT, my MFT can be full before the drive. Is full when that happens it becomes hard to work with or DE-fragment the drive.Impossible even it just takes long and nothing defragments. By clearing the deleted files from the MFT using CCleaner, I get free MFT space it might be enough to be able to work with my drive again. So it is important to know this. If you have so many small files as I do, you will first notice defragment does not work, then it is time to clear the MFT an usually I'm good for a few weeks at least. Of course I would not have this problem if I had made partitions, but I need that much space on my C drive, for all my development tools/IDE's.






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