Service Utilities

10. Disk Wipe DoD 5220.22OM

The purpose of this Service Utility is to securely erase data on the Hard Disk according to the directive DoD 5220.22-M.

The printer's hard disk is used as a temporary storage area for print jobs. The Secure Disk Wipe utility can erase your information from the hard disk to prevent unauthorized access.

Secure Disk Wipe provides three different levels of security:

„Unsecure Mode: all pointers to the information are erased. The information itself is NOT erased, and remains on the hard disk until the disk space it occupies is needed for new print jobs. The new print information overwrites the old information. While the information remains on the disk, it is difficult for most people to access, but may be accessed using software designed for that purpose. This is the normal method in which files are erased on most computer systems; it is the fastest method but the LEAST secure. This is the default security level when using Secure Disk Erase.

„1 Pass Mode: all pointers to the information are erased, and the information itself is immediately overwritten with a fixed character pattern. This method is slower than Non-Secure Fast Erase, but more secure. It may still be possible to access fragments of the erased information by using special tools to detect residual magnetic traces.

„5 Pass Mode: all pointers to the information are erased, and the information itself is repetitively overwritten using an algorithm designed to eliminate any residual traces. This is the slowest method, but the most secure. Secure Sanitizing Erase meets the US Department of Defense 5220-22.m requirements for clearing and sanitization of disk media.

Perform the Disk Wipe DoD 5220.22OM utility as follows:

1In the Service Utilities submenu, scroll to "Disk Wipe DoD 5330.22-M" and press OK.

2In the Disk Wipe DoD 5330.22-M submenu, scroll to "Sanity Level" and press Enter

HP Designjet T Series — Service Manual

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