HP CM8060 Color MFP Kundendienst Handbuch Seite 176

Non-volatile memory (NVM) resets and initializations
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Memory architecture
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Memory-management tools
Memory architecture
The MFP has two independent controllers: the formatter and the Coprocessor.
Each controller has a hard drive and NVRAM storage devices. The hard disk of each controller is
partitioned. In some cases data are stored redundantly between the two controllers so that if the data
in one location is missing or invalid, the data can be reloaded from the redundant location.
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Formatter
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Coprocessor
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Shadow copies
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Data groupings
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Where data are stored
Formatter
The formatter contains a custom-made board on which the LaserJet LynxOS is executed. The formatter
hard disk contains the OS and associated firmware. The formatter initializes the OS from the hard disk.
The formatter has a NVRAM chip that contains the following data:
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Manufacturing data
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Warranty and maintenance data
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Configuration data
For a description of the partitions on the formatter hard disk, see
auf Seite 113.
Coprocessor
The Coprocessor has a custom-made board that is designed to initialize and execute a Windows OS
and associated firmware. Unlike the formatter, the Coprocessor does not have an NVRAM chip. All
Coprocessor data are stored on the Coprocessor hard drive.
For a description of the partitions on the Coprocessor hard disk, see
auf Seite 113.
Shadow copies
Some data are stored redundantly.
The formatter maintains a shadow copy of the formatter NVRAM. Whenever the NVRAM is updated,
the shadow copy is updated. If NVRAM is corrupt when the MFP powers up, the NVRAM is rebuilt from
the shadow copy. Individual subsystems that use NVRAM can access the appropriate parts of the
shadow copy to rebuild any corrupted data.
110 Kapitel 4 Managing and maintenance
„Where data are stored"
„Where data are stored"
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