Patrick’s development blog

Delete data from hard drive securely

Posted in Computer Science, Security by Patrick on May 10, 2011

It’s common for people to say that it’s necessary to overwrite the hard drive many times before the data becomes unrecoverable. This is however just a myth. The probability of recovering only a single byte is less than 1%, so it’s very unlikely that someone can restore something much bigger like 100 MB.

In other words, overwriting the hard drive many times is just a waste of time. Writing 0:s on the whole hard drive is sufficient and can be done with tools like dd.

More information:
http://www.h-online.com/newsticker/news/item/Secure-deletion-a-single-overwrite-will-do-it-739699.html

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: