HP LaserJet Managed MFP E72425-E72430, E72525-E72535, E77422-E77428, E77822-E77830, E82540-E82560, E87640-E87660 - Hard disk security (white paper)

ManualsBrandsHP ManualsDesktopsHP LaserJet Managed Flow MFP E72525-E72535z - Base Product 25-35 ppm

June 2019    Public 
Version 2.0 
 
1 
Technical white paper  
HP LaserJet Managed MFP Hard Disk Security 
 
 
Contents 
Introduction  2 
Products  2 
Data Usage by Engine Controller Board and Formatter HDDs  2 
Engine Controller Board HDD Data  2 
Formatter HDD or eMMC Data  2 
Additional Data Stored on the Formatter HDD or eMMC  3 
Engine Controller Board eMMC Module  3 
Secure Erase Commands  3 
Secure Erase  3 
Erase / Unlock  3 
Customer Job Data Erase Commands  4 
Erase Job Data  4 
Formatter eMMC Job Data  4 
Managing Temporary Job Files  5 
Disk Initialization Commands  6 
Format Disk  6 
Partial Clean  6 
Government Erase Standards  7 
Appendix A: Secure Erase Specifications  8 
Overwrite Specifications  8 
Appendix B: eMMC Security Characteristics  9 
Embedded Multimedia Card (eMMC) Security Overview  9 
Secure Erase Data Overwrite Functionality Not Supported on eMMC  9 
Secure Volatile Storage Feature with eMMC  9 
Appendix C: Formatter and Engine Controller Board Storage Options  10 

Summary of content (11 pages)

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Technical white paper HP LaserJet Managed MFP Hard Disk Security Contents Introduction 2 Products 2 Data Usage by Engine Controller Board and Formatter HDDs 2 Engine Controller Board HDD Data 2 Formatter HDD or eMMC Data 2 Additional Data Stored on the Formatter HDD or eMMC 3 Engine Controller Board eMMC Module 3 Secure Erase Commands 3 Secure Erase 3 Erase / Unlock 3 Customer Job Data Erase Commands 4 Erase Job Data 4 Formatter eMMC Job Data 4 Managing Temporary Job Files 5 Dis
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Introduction The HP LaserJet Managed MFP printers listed below have an additional processing board (Engine Controller Board) and associated hard disk drive (HDD) in addition to the device formatter HDD or eMMC. This whitepaper provides technical information regarding what data is stored on the Engine Controller board HDD and data stored on the formatter HDD or eMMC.
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Note: See “Appendix C: Formatter and Engine Controller Board Storage Options” for models with eMMC storage. Additional Data Stored on the Formatter HDD or eMMC In addition to print job data, the formatter HDD or eMMC also manage the following system data: • Configuration data - Contains administrator and user configured settings and system information. • System data - Contains the HP FutureSmart Firmware operating system code.
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Figure 2: Erase / Unlock in device Pre - boot Menu Customer Job Data Erase Commands These erase options determine how files created as part of processing and storing print, copy, fax, or digital send jobs are erased. The commands are only available in the device EWS or Web Jetadmin.
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Figure 4: eMMC Erase Job Data settings in the Embedded Web Server Note: For eMMC erase capabilities see “Appendix B: eMMC Security Characteristics” Managing Temporary Job Files This feature controls how temporary files created during the processing print, copy, fax, or digital send jobs are erased as part of completing the current job from both the engine controller board HDD and the formatter HDD.
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Formatter eMMC Temporary Job Files Formatter eMMC storage does not support Overwrite erase options. Only the Non-Secure Fast Erase option is available. Figure 6: Managing Formatter eMMC Temporary Job Files settings with in the EWS Note: For eMMC erase capabilities see “Appendix B: eMMC Security Characteristics” Disk Initialization Commands These commands reinitialize the hard disk or sections of the disk to provide troubleshooting and diagnostic capabilities.
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Government Erase Standards These devices follow comply with current US Government requirements for clearing confidential data from a hard disk as specified in Updated DSS Clearing and Sanitization Matrix AS OF June 28, 2007 and NIST Special Publication 800-88, Guidelines for Media Sanitation.
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Appendix A: Secure Erase Specifications Normally when a file is deleted from a HDD, the filename entry is erased from the disk’s file allocation table, removing the file’s presence. The file’s data still exists in the disk’s individual sectors and is overwritten only when that sector is allocated for a different file.
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Appendix B: eMMC Security Characteristics Embedded Multimedia Card (eMMC) Security Overview Some models of HP printing devices use Embedded Multimedia Card (eMMC) mass storage devices as the system disk (See Appendix C for these models). SSD and eMMC are mass storage devices that use NAND-based flash memory instead of spinning disks used in traditional hard disk drives (HDD). These memory based drives appear to the printing device operating system as a traditional Hard Disk Drive.
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Appendix C: Formatter and Engine Controller Board Storage Options HP LaserJet Model Formatter Storage 16 GB eMMC HP LASERJET MANAGED MFP E724xx dn SERIES Y HP LASERJET MANAGED MFP E725xx dn SERIES Y HP LASERJET MANAGED FLOW MFP E725xx z SERIES 320 - 500 GB HDD AES-256 Engine Controller Board 16 GB eMMC Y Y HP COLOR LASERJET MANAGED MFP E778xx dn SERIES Y Y Y Y Y Y HP LASERJET MANAGED MFP E825xx du SERIES Y Y HP LASERJET MANAGED MFP E825xx dn SERIES Y Y HP LASERJET MANAGED FLOW MFP E825
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© Copyright 2019 HP Development Company, L.P. The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions conta ined herein. Trademark acknowledgments, if needed.