HP LaserJet Managed MFP E72425-E72430, E72525-E72535, E77422-E77428, E77822-E77830, E82540-E82560, E87640-E87660 - Hard disk security (white paper)
2
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.
Products
HP LASERJET MANAGED MFP E724xx SERIES
HP LASERJET MANAGED MFP E725xx SERIES
HP LASERJET MANAGED FLOW MFP E725xx SERIES
HP COLOR LASERJET MANAGED MFP E778xx SERIES
HP COLOR LASERJET MANAGED MFP E774xx SERIES
HP COLOR LASERJET MANAGED FLOW MFP E778xx SERIES
HP LASERJET MANAGED MFP E825xx SERIES
HP LASERJET MANAGED FLOW MFP E825xx SERIES
HP COLOR LASERJET MANAGED MFP E876xx SERIES
HP COLOR LASERJET MANAGED FLOW MFP E876xx SERIES
Data Usage by Engine Controller Board and Formatter HDDs
Engine Controller Board HDD Data
The engine controller board HDD is part of the scan image pipeline. All scanner related job files or temporary job files are
stored on this drive. This includes files required for the following job types:
• Copy
• Send to E-mail
• Send to USB drive
• Send to Network Folder
• Send to Fax
• Send to SharePoint
• Scanned Stored Jobs
All temporary files created as part of processing scan jobs are erased at the completion of the job and before the next job
begins. The file erase used is dictated by the Managing Temporary Job Files setting located in the EWS or though Web
Jetadmin.
Formatter HDD or eMMC Data
The formatter HDD or eMMC is part of the print image pipeline. All print related job files or temporary job files are stored
on this drive. This includes files required for the following job types:
• Large print jobs
• Print jobs using Collation paper handling
• Stored Jobs (driver based)
All temporary files created as part of processing print jobs are erased at the completion of the. The file erase used is
dictated by the Managing Temporary Job Files setting located in the EWS or though Web Jetadmin.