Jordan Spizikes Data sanitization

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What is the Need to Wipe Hard Disk?
It is practical and necessary to wipe computer free space. Suppose that you are working in an organization and you have also stored some of your personal files on your computer system. When you resign from your office you will sure want to delete your private files from the system so that the next employee is not able to view those files. Also,[link widoczny dla zalogowanych], it may be possible that the computer used by in the office is sold out to upgrade the office with new computers. In both the cases, private and confidential data must be deleted otherwise it can be misused by any person whoever gets a chance to do so.
To delete a file, most people use the delete or shift + delete command option of the operating system. To delete all the data of hard disk, the most a user does is format the disk. But is the case solved by these steps? Is the data deleted permanently and can not be viewed by any persons in any circumstances? It is not so. Your data is present at the same place and can be recovered using data recovery programs. Most people are not aware of this fact.
A regular computer knows that a deleted file also shows up sometimes after scanning or repairing or restoration of operating system. So,[link widoczny dla zalogowanych], what can be the reason behind this unusual phenomenon? Data files are located by the operating system by help of a pointer link. When they are deleted the link holding the file is deleted and marked as deleted. The content and information about the file is not deleted in the operation and it is just marked as free. When ever a new file is written in the disk, it uses this space and overwrites the data of the previous file. Like this,[link widoczny dla zalogowanych],[link widoczny dla zalogowanych], the file can be recovered until it is overwritten by any other data. To wipe the data permanently, all the space must be overwritten with garbage and meaning less data. This can be done using a disk eraser program.
There are a number of disk eraser programs available to do the data wiping job efficiently. Same numbers of data recovery software programs are also present in the market, to recover deleted data. If any one gets access to your computer, he can use these data recovery applications to recover your confidential data. If you do not ensure permanent erase of your data it can cost you your privacy and confidentiality exposed to public. Your trade secrets, your bank accounts, personal and professional contacts can be used to defame you and harm your business. To check all these activities, make it sure to permanently delete your data before handing the computer system in uncontrolled environment.
The first step to start wiping is to buy and install good disk wiping software. Data wipe or shredder programs overwrite the data making it permanently unrecoverable. The bit pattern used by them is generated by authentic and researched overwriting algorithms. Simplest pattern is to overwrite all the data with 0s. Data is overwritten multiple number of times to ensure complete overwriting and un-recoverability of data by any means. Da