A recent discussion over at the Donation Coder forum touched that subject. A user noticed that he was able to restore data from a dedicated server that was rented by someone else before. This can have some serious implications. Dedicated servers can hold all kinds of sensible data including user accounts, passwords, business databases, email addresses, personal information, photos, media and documents. Many of these can still be restored if the hard drives are not wiped correctly which obviously can be very problematic not only from a business point of view but also from a private view depending on the kind of data that has been stored on the hard drives of the dedicated server.

There are two possibilities to ensure that no third party will have access to the data stored on the server drives. Option A would be to purchase the hard drive from the web hosting company. Most will not have problems selling hard drives to their customers for a premium. This is actually a good option for most companies as it would mean that they will have physical access to the hard drive that has been in their dedicated server.

The second option is to wipe the hard drive of the dedicated server securely before the contract ends. The possible solutions are limited as the server has to be running to be able to remotely access it. One way to wipe a specific hard drive or partition of a dedicated server is to issue the following command:

shred -f -z -v -u /dev/sda

This will wipe /dev/sda, you might need to change that. The process will take some time obviously. The parameters mean the following:

• -f: force, changes permission levels to allow writing if necessary
• -z: zeroes, will overwrite the entire disk with zeroes in the end
• -v: verbose, display the progress
• -u: remove, truncates and remove file after overwriting

Related posts

• Wiredtree Review After Four Months (3)
• New Managed Server Ordered (11)
• How To Select A Dedicated Server Provider (14)
• Who shares your shared hosting? (5)
• What you Really Need to Know about Choosing a Web Host (10)

I was thinking of something different though. What if I want to keep my hard drives for now but make sure that deleted data can’t be recovered by any means ? I tried and ran some file recovery programs such as Recuva and it showed thousands of files that were still referenced on my system although they have been deleted before. I think that this is a privacy problem and decided to look for a way to delete all file information on the unused part of my hard drives.

I decided to use Recuva first and see how many file information it would find. After that I would run a program named Eraser which I will use to clean the unused disk space of any deleted file information and finally run Recuva again to see if this reduced the amount of files that could be undeleted from my system.

Testing my Hard Drive with Recuva:

Recuva found 33720 files on my hard drive f: that could be undeleted. This is a large amount of files.

Running Eraser:

After right-clicking the central pane I was able to create a new task. The first option was unused space on drive which is the default option in the menu. I selected the f: hard drive from the list. Eraser was showing my newly selected task in the central pane and I had to right-click that task once again and select Run from the context menu. It took two and a half hours to overwrite all the data on my 100 gigabyte hard drive.

Testing the result with Recuva:

Recuva found one file on drive f: Everything else was not found anymore which leads to the conclusion that this is an excellent way to erase file information that exists on the unused space on your hard drives. This is probably not enough to erase it for the big boys if you know what I mean but every amateur should have problems getting information about those files.

Related posts

• Solid State Hard Drives (16)
• Solid State Drives Test Results (4)
• Recover Deleted Files (4)
• Fast SSD vs. Hard Disks (5)
• Check your Hard Drives with HDD Health (3)

Undelete Plus is a file recovery freeware that scans your hard drive for deleted files and recovers them for you. It supports the most common file systems such as fat16, fat32 and ntfs and is able to work with removable devices such as flash memory or disk drives as well. A great feature for a freeware file recovery software is the ability to work on network drives as well.

A little bit of background information why Undelete Plus is able to recover deleted files. Many users do not know that files that are deleted are not removed from the system at once. The complete file still exists on the drive but the reference to the file is deleted. File operations on those sectors make it harder to recover those files but the right tools (professional data recovery) can still detect those files.

This is one of the reasons why I would never sell my hard drives at ebay or other websites. The right equipment is able to check on my data and this is something that I do not want to risk. Even if you wipe it carefully there is the possiblity to recover files. Not with tools like Undelete Plus though.

The scan does not take this long until it is complete, on my 300 Gb hard drive it took about 20 minutes. After the scan finishes all files that can be recovered are displayed in the main window. The left window supplies some filters, you can choose that only a certain filetype is displayed for recovery, a certain folder location or a drive. (you may scan more than one drive).

Just mark the files that you want to recover and choose to keep the original folder structure of the files or move them all into a different folder. Undelete Plus found more than 60000 files that could be recovered on my drive which is a big number, I really have to think of a way to wipe them completely after a set number of days.

Related posts

• DP Secure Wiper removes files securely from your system (3)
• Automatically move files from your desktop (6)
• Analyse your hard disk and stop wasting space (5)
• Xsite Freeware (1)
• Windows Tip: Don’t replace any files while copying (10)