It has always seemed ironic to me that when you accidentally
delete a file, it’s often tough to get the file back. However, it seems that
when you delete a file on purpose, recovering the deleted file is often all too
easy. Simply deleting a file doesn’t mean that it’s gone for good. There are
plenty of Undelete utilities that can easily revive supposedly erased files on
a workstation. But what do you do when you want to permanently erase a file?
Short of taking a ball-peen hammer to the hard drive, here are a few
Going beyond formatting
You can format a hard drive to erase data, but someone could
easily unformat the hard drive and then gain access to all the files that once
existed on it. I routinely used my computer to manage both my personal finances
and the finances for my businesses. Everything from credit card numbers to Social
Security numbers to tax records were on the hard drive at one time, and could
easily be salvaged if all I did was format the drive.
If I sold my PC and the buyer decided to unformat the hard drive,
he or she could do a lot of financial damage or even engage in full-scale
identity theft. In fact, there have been reports of people who purchased used
computers at thrift stores for this very purpose. There are more than 700,000
cases of identity theft reported in the United States each year, many related
to personal computer use.
A while back, the U.S. Department of Defense began to
realize just how vulnerable to disclosure the data on old hard drives was. It
therefore passed DoD 5220.22-M, the hard disk clearing
and sanitizing standard. Basically, this standard describes how Defense Department
hard drives should be reformatted so that there’s no chance of recovering any
previously existing data.
Obviously, the Windows Format command doesn’t conform to
this standard yet. I wouldn’t be surprised to see a secure format built into
the next Windows operating system. In the meantime, though, if you want to
securely format a hard drive, you’ll need to purchase a third-party secure
There are several utilities on the market. One popular
choice is Active@ KillDisk. This
product comes in a free version or a professional version. The free version
performs a semi-secure format, while the professional version, which sells for
$29.95, conforms to Defense Department standards.
Another competing product is East-Tec Sanitizer. The standard
version of this product allows one person to format up to 10 hard drives for
$29.95. For $199, up to 10 technicians can format an unlimited number of hard
drives. There is also a free trial version that allows one person to reformat
one hard drive.
Another company, Eraseyourharddrive.com, is offering a unique
approach to secure hard drive formatting. Unlike the other solutions I’ve mentioned,
the Eraseyourharddrive.com approach is Web-based. The user purchases a single-use
license for $23.95 and uses it to reformat his or her hard drive in a secure,
Although the company plans to offer discount pricing for
organizations needing to format multiple PCs, I got the impression from the
company’s Web site and press releases that the service is being primarily
targeted toward individuals who need to reformat a single PC. In my opinion, if
you’re formatting only one PC for personal use, then it’s probably better to
save yourself the $23.95 and just download a free copy of East-Tec Sanitizer.