Write Zeros on Empty Space

Discussion in 'Macintosh Computers' started by Xephian, Dec 16, 2005.

  1. Xephian macrumors 6502a

    Xephian

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    #1
    Is there any program that is capable of doing this? I know that there is CyberScrub for Windows that does this but do not know one for OS X.
     
  2. grapes911 Moderator emeritus

    grapes911

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    #2
    I don't know of a program, but what benefit do you get out of zeroing out all unused space?
     
  3. generik macrumors 601

    generik

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    #3
    I believe you can get it done using Disk Utils (part of OSX)

    He probably deleted some files that he wants to be gone forever :D
     
  4. grapes911 Moderator emeritus

    grapes911

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    #4
    In that case, you can use the secure empty trash. I'm pretty sure disk utiltiy can only zero out data when formatting.
     
  5. NYmacAttack macrumors 6502

    NYmacAttack

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    #5
    The secure empty trash will overwrite the file several times so it is not recoverable. If you use the disk utility to fully format the drive, there are several options for securly wiping the drive.
     
  6. ortuno2k macrumors 6502a

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    #6
    You can write zeros to the hard drive as many as 35 times when you format it using the Disk Utility included with the OS.
     
  7. Xephian thread starter macrumors 6502a

    Xephian

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    #7
    But I only wanted to write it on unused space so I will not lose any data.
     
  8. mrichmon macrumors 6502a

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    Jun 17, 2003
    #8
    A quick google turns up Trash X.
     
  9. sushi Moderator emeritus

    sushi

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    #9
    As someone already mentioned above, when you empty your trash can use Secure Empty Trash under the Finder's Finder menu.

    Sushi
     
  10. cjc343 macrumors 6502

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    #10
    You can use Disk Utility. I don't remember when they added the function, but in 10.4, if you open disk utility, and select the PARTITION of the disk that you want to Zero-out free space on (The partition is the child option that has the same name as the disk on your desktop: most likely "Macintosh HD"). Click on the Erase tab, and near the lower left, there will be a button to "Erase Free Space..." which, when you click it, gives you the option to 0-out all data, run a 7-pass erase, or run a 35-pass erase.
     
  11. generik macrumors 601

    generik

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    #11
    By the way if you turn on Filevault (there is this icon of a house that looks like a safe) and encrypted page file you can just do away with this altogether.

    Don't do it on a PB though, the performance penalty is quite significant.
     

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