HP Designjet T920 ePrinter series - Manual (Page 147)

the purpose. This is the normal method in which files are erased on most computer systems; it is the
fastest method but the least secure.
● Secure Fast Erase (1 pass): all pointers to the information are erased, and the information itself is also
overwritten with a fixed character pattern. This method is slower than Non-Secure, but more secure. It
may still be possible to access fragments of the erased information by using special tools to detect
residual magnetic traces.
● Secure Sanitizing Erase (5 passes): 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. This is the default security level
when using Secure File Erase.
While files are being erased, the printer's performance may be affected.
Secure File Erase is one of the facilities provided by Web JetAdmin, which is HP's free Web-based print
management software: see http://www.hp.com/go/webjetadmin .
If you have difficulty in using Secure File Erase from Web JetAdmin, please contact HP Support: see Contact
HP Support on page 191 .
The Secure File Erase configuration can be changed from Web JetAdmin or the Embedded Web Server (Setup
> Security).
Disk Wipe
Disk Wipe is the same as Secure File Erase (see Secure File Erase on page 138 ), except that it erases all
temporary files, including old ones.
The Disk Wipe configuration can be changed from Web JetAdmin or the Embedded Web Server (Setup >
Security).
NOTE: If you choose to erase the whole hard disk, you may be asked to restart the printer several times
during the process, which will take about 6 hours with Secure Fast Erase or 24 hours with Secure Sanitizing
Erase.
ENWW Disk Wipe 139