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How to completely erase the data on the hard drive Mac
Tips and tricks
If you are going to sell your Mac or often work with files and documents of primary importance , the interest that your data is securely hidden from third parties. However, even the complete removal of files can not provide a high degree of security because they still remain on the hard disk as long as the space is completely filled. So, through complex (and not) handling information can be restored.
To avoid this, after the removal of these files, you must make sure to clean the free hard disk space. Fortunately, OS X is responsible for the operation built-in “Disk Utility”, with which we have already worked before . At this time, we again resort to its aid.
To run the “Disk Utility” to go to the “Utilities” program on your Mac and select the appropriate application. Then select the tab “Erase” – in the lower left corner of the button will appear “Erase free space”. This is where the fun begins.
In OS X has three erasure method, which differ not only speed, but also the degree of data protection.
If you choose this option over the unused disk space automatically zeros are written. Takes the least time and provides an acceptable level of safety.
This option provides the maximum level of security for erasing data. It is also called the method of “cleaning for seven passes.”
The “Clean seven passes for” meets the standard DoD 5220.22-M. This standard refers to three passages, but disk utility performs passes seven times.
As you know, this method will protect your data much better than their predecessors. Cleaning is taking place in 35 calls: in other words, data is written on top of the disk 35 times.
Стираем свободное место
I would recommend the second option – your files and documents are safe from the recovery, it does not have to wait for several hours. Of course, if you want to be safe, it is best to use the third method.Viewing:-149
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