Sometimes due to virus attacks or security reasons it is required to wipe hard drive completely. And the most common method used for this is either deleting all files manually or by formatting the hard drive. But in either case the data is not completely lost. Only the links from the allocation tables are removed but the data still exist on the hard drive. And this data can be easily recovered using hard disk recovery software. The hard disk recovery software is specialized software that can recover the information from the hard disk even after you have formatted the hard disk.

So, in order to make the files non recoverable you not only need to delete the data but have to fill it with some garbage value. This job of deleting data and making the file irrecoverable is done by some specialized software called wipe utility. These wipe utility shreds the data in such a way that it cannot be recovered again even after using the deleted file recovery wizard. Thus it offers a sigh of relief when we talk about security of data. But you should also be very much cautious while using the wipe utility as the data once delete cannot be recovered. Thus always be sure of having a backup of the important files so that you can restore them after the hard disk has been wiped.