WFD Posted October 29, 2010 Share Posted October 29, 2010 I like to overwrite the disk free space with zeroes so when I make a compressed image of the disk for backup purposes it will compress the unused portions of the disk very effectively. Does anyone know if the CCleaner single pass method uses zeros or random data or ? Thanks. Link to comment Share on other sites More sharing options...
Moderators DennisD Posted October 29, 2010 Moderators Share Posted October 29, 2010 I'm wondering what software you use for "Imaging" your System Drive? There are very good free Disk Imaging applications available which do not include free space in the Image, therefore keeping the size down. One used by a number of members on here is Macrium Reflect. (Free Version) As to your question, I believe CCleaner overwrites with 0's, but I'm not 100% on that, as I've never seen it actually written down in any of the guides. http://www.piriform.com/docs/ccleaner/using-ccleaner/wiping-free-disk-space Welcome to the forum by the way. Link to comment Share on other sites More sharing options...
WFD Posted October 29, 2010 Author Share Posted October 29, 2010 Thanks. I did a test and looked at the drive afterwards with Disk Investigator, and it does indeed overwrite with zeros. WFD Link to comment Share on other sites More sharing options...
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