Recuva-like tool for the Mac?

Discussion in 'OS X El Capitan (10.11)' started by KeyMs92, Feb 8, 2016.

  1. KeyMs92 macrumors regular

    Joined:
    Mar 26, 2015
    #1
    When selling an external hard drive I'd like to make sure that none of the files are recoverable. I've just completed wiping the entire hard drive with zeroes and random data using the disk utility. Now I'd like to verify if indeed none of the files are recoverable using a recovery tool. In the past I used Recuva for this, but I cannot seem to find an equivalent tool for the Mac. Is there any free tool you'd recommend for this?
     
  2. SgtPepper23 macrumors regular

    Joined:
    Oct 13, 2010
    Location:
    Los Angeles, California
    #2
    As far as I know, there aren't any good free ones. I've used Data Rescue 3 before and have been able to recover data quite well, though haven't tried from a zeroed out disk before, just a hard drive i had laying about. It probably wouldn't recover from zeroed out data, though I can't say for certain as i've not tested it
     
  3. simonsi macrumors 601

    simonsi

    Joined:
    Jan 3, 2014
    Location:
    Auckland
    #3
    TBH if the drive has had bank details or credit card details on its not worth the risk IMHO...if you don't need the drive use it as a backup, if you don't want it then physical destruction is the way to go.
     
  4. JohnDS macrumors 65816

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    Oct 25, 2015
    #4
  5. KeyMs92 thread starter macrumors regular

    Joined:
    Mar 26, 2015
    #5
    Thank you! That looks like the tool for the job. I'm running a deep scan now. :)
     
  6. KeyMs92 thread starter macrumors regular

    Joined:
    Mar 26, 2015
    #6
    Hmm, strange... A recovery still leaves me with 400MB of files (out of a 2TB hard drive), including a 3 minute video file!

    I did a secure erase via the disk utility that writes the drive with 1x zeroes and 1x random data. I did it two times, and each time leaves me with the same set of recovered files. Perhaps it doesn't catch every part of the hard drive? Should I try the hard drive manufacturer's (WD) utility? Unfortunately, it's not available on Mac, which is why I tried the disk utility first.
     
  7. kaioshade macrumors regular

    kaioshade

    Joined:
    Nov 24, 2010
    #7
    testdisk is also a very reliable file recovery utility as well.
     
  8. SgtPepper23 macrumors regular

    Joined:
    Oct 13, 2010
    Location:
    Los Angeles, California
    #8
    Why not go with the 7-pass format? I'm sure it'll take an eternity though...
     
  9. KeyMs92 thread starter macrumors regular

    Joined:
    Mar 26, 2015
    #9
    Turns out the disk utility doesn't actually secure erase all data and WD's utility does. I'd call that false advertising on Apple's part to say the least. (No, even a 7-pass format wouldn't have helped because it just cannot read a part of the disk.) In any case, it's all good now.
     

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