Lexmark MS817 Embedded Web Server Administrator s Guide - Page 61

Disk file wiping, Erasing hard disk data

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Securing printers 61 Disk file wiping The file-based disk wipe sanitizes the portion of the hard disk where data was stored after a job has been processed to remove any residual data. Some devices use hard disks to temporarily buffer scan, fax, print, and copy data that exceed the amount of RAM installed on the device. Buffered data can be deleted from the hard disk immediately after an original scan, fax, print or copy job is complete. Additionally, devices can temporarily hold print jobs on a hard disk using the Confidential Print and Print and Hold features or when held fax jobs are received and sent. This data remains on the hard disk until you print or delete the job, or until the document expires through the job expiration feature. When a data file is deleted from a hard disk, the data that is associated with that file is not actually deleted. This data remains on the hard disk and can be recovered with substantial effort. All printer models with a hard disk support an additional mechanism for protecting residual data, which is hard disk file wiping. Hard disk file wiping actively overwrites any job data files that are deleted. You have a choice of single or multiple passes to overwrite data, which removes all data residue from the deleted file. All permanent data on the hard disk is preserved, such as downloaded fonts, macros and held jobs. The multiple pass wiping process adheres to NIST and DoD (DoD 5220.22-M) guidelines for overwriting confidential data. Erasing temporary data files from the hard disk On devices that contain a hard disk, use the Erase Temporary Data Files option to remove residual confidential material and free up memory space. This setting securely uses random data patterns to overwrite files stored on the hard drive that have been marked for deletion. Overwriting can be accomplished with a single pass for a quick wipe, or with multiple passes for greater security. Note: If there is no hard disk installed on your device, then Erase Temporary Data Files is not available in the main Security menu. 1 From the Embedded Web Server, click Settings > Security > Erase Temporary Data Files. Note: Wiping Mode can only be set to Auto. This setting automatically wipes the files that are no longer required for printing. 2 Select the Automatic Method setting: • Single Pass-Overwrite the printer hard disk in a single pass with a repeating bit pattern. This setting is the factory default. • Multi‑pass-Overwrite the printer hard disk with random bit patterns several times, followed by a verification pass. A secure overwrite is compliant with the DoD 5220.22M standard for securely erasing data from a hard disk. Use this method to wipe highly confidential information. 3 Click Submit. Erasing hard disk data Completely erase the hard disk data to wipe it clean when doing any of the following: • Decommissioning the device • Replacing the hard disk • Moving the device to a different department or location • Preparing the device to be serviced by someone outside the organization • Removing the device from the premises of service

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Disk file wiping
The file-based disk wipe sanitizes the portion of the hard disk where data was stored after a job has been
processed to remove any residual data.
Some devices use hard disks to temporarily buffer scan, fax, print, and copy data that exceed the amount of
RAM installed on the device. Buffered data can be deleted from the hard disk immediately after an original
scan, fax, print or copy job is complete. Additionally, devices can temporarily hold print jobs on a hard disk using
the Confidential Print and Print and Hold features or when held fax jobs are received and sent. This data remains
on the hard disk until you print or delete the job, or until the document expires through the job expiration feature.
When a data file is deleted from a hard disk, the data that is associated with that file is not actually deleted. This
data remains on the hard disk and can be recovered with substantial effort. All printer models with a hard disk
support an additional mechanism for protecting residual data, which is hard disk file wiping.
Hard disk file wiping actively overwrites any job data files that are deleted. You have a choice of single or
multiple passes to overwrite data, which removes all data residue from the deleted file.
All permanent data on the hard disk is preserved, such as downloaded fonts, macros and held jobs. The multiple
pass wiping process adheres to NIST and DoD (DoD 5220.22-M) guidelines for overwriting confidential data.
Erasing temporary data files from the hard disk
On devices that contain a hard disk, use the Erase Temporary Data Files option to remove residual confidential
material and free up memory space. This setting securely uses random data patterns to overwrite files stored
on the hard drive that have been marked for deletion. Overwriting can be accomplished with a single pass for
a quick wipe, or with multiple passes for greater security.
Note:
If there is no hard disk installed on your device, then Erase Temporary Data Files is not available in the
main Security menu.
1
From the Embedded Web Server, click
Settings
>
Security
>
Erase Temporary Data Files
.
Note:
Wiping Mode can only be set to
Auto
. This setting automatically wipes the files that are no longer
required for printing.
2
Select the Automatic Method setting:
•
Single Pass
—Overwrite the printer hard disk in a single pass with a repeating bit pattern. This setting is
the factory default.
•
Multi
‑
pass
—Overwrite the printer hard disk with random bit patterns several times, followed by a
verification pass. A secure overwrite is compliant with the DoD 5220.22M standard for securely erasing
data from a hard disk. Use this method to wipe highly confidential information.
3
Click
Submit
.
Erasing hard disk data
Completely erase the hard disk data to wipe it clean when doing any of the following:
•
Decommissioning the device
•
Replacing the hard disk
•
Moving the device to a different department or location
•
Preparing the device to be serviced by someone outside the organization
•
Removing the device from the premises of service
Securing printers
61