HP StorageWorks XP Remote Web Console Software - Manual (Page 9)

XP Data Shredder user guide 9
1 XP Data Shredder for the
XP128/XP1024/XP10000/XP12000
If you change the user for a volume, you should delete data stored by the previous user for security
purposes. The Data Shredder feature deletes data on volumes and prevents deleted data from being
restored. Shredding operation refers to the process of deleting all data on a volume by overwriting it with
dummy data.
Data Shredder is based on DoD5220.22-M, which is the standard defined by the U.S. Department of
Defense.
Data Shredder is used for both open and mainframe systems.
Overview of Shredding operations
The Shredding operation completely deletes data on a specified volume by repeatedly overwriting existing
data with dummy data. You perform Shredding operations from the Command View XP management
station or XP Remote Web Console. Figure 1 shows an example of Shredding operations.
Figure 1 Overview of Shredding operations
Because of the nature of hard disks, overwriting a volume once is not enough to completely delete data,
which means deleted data could be restored. Therefore, HP recommends you overwrite a volume with
dummy data at least three times.