![]() ![]() The reason for this is that the operating system only deletes the pointer. The amount of 'free space' stays exactly as before the operation. All that wiping does is write one big file that expands to fill up all the free disk space, then delete this file when the disk is full. However, Windows doesn't make any difference between a deleted file and free space. No, wiping free space on a disk does not free any space on that disk. The pcs run fine even when disk maintenance is neglected for many weeks. I defrag the files when the list gets too long, and wipe the free space when Recuva shows too many files. The issue seems to be that in CCleaner v "Wipe Free Space" will not run unless "Wipe MFT Free Space" is checked. Wipe Free Space erases already deleted files in order to make them unrecoverable by file recovery software such as Recuva. Tr, my experience is that defragging, defragging free space and wipe free space have no effect on each other. Okay, but we're getting off topic, I suppose. Makes you wonder about what secrets I must harbor on my PC. ![]() When I would sell my computer, I would feel safer if I used some program for advanced wiping. Whether 1 pass will be enough or whether there is need for a more advanced wiping method, that's depending on what information was on that computer and depending on how anxious you are about someone using advanced technologies to recover deleted data. But they will either be all zeroes or small zero files. After a WFS Recuva will still list all these deleted records, with file names which may be valid or not, and these files can be recovered (in as much as the files overwritten data can be retrieved). Depending on the vector assignment, copies can be spun off, meaning traces can still exist. Particularly when you sell a used computer you might want to clean up all personal files and also thoroughly wipe free space to make sure there are no leftovers to be found. A WFS may - depending on the settings - overwrite the file names in the MFTs records. Well, when does one ever need to wipe free space, anyhow?Īnd when does one need to use more than one pass?ĭepending on what's on one's drives, it could be advisable to thoroughly wipe free space when other people have access to those drives. Do you really ever need to use more then 1 pass? ![]()
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