DesignJet T900 and T1500 Printer Series - User guide

you turn it on, but old temporary les that were already on the hard disk are not erased retroactively. If you
want to erase the old les too, see Disk Wipe on page 130.
Secure File Erase provides three dierent levels of security:
●
Non-Secure: all pointers to the information are erased. The information itself remains on the hard disk
until the disk space it occupies is needed for other purposes, and it is then overwritten. While it remains
on the disk, it is diicult for most people to access, but may be accessed using software designed for the
purpose. This is the normal method in which les 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 xed 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 les are being erased, the printer's performance may be aected.
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 diiculty in using Secure File Erase from Web JetAdmin, please contact HP Support: see Contact
HP Support on page 178.
The Secure File Erase conguration 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 129), except that it erases all
temporary les, including old ones.
The Disk Wipe conguration 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.
130 Chapter 15 Maintaining the printer ENWW