HP QMS 4060 - Manual (Page 152)

Memory
QMS 4060 Print System Reference 5-10
is distributed. Your printer comes with 32 MB of RAM, but it is upgrad-
able to 128 MB by adding Single In-line Memory Modules (SIMMs).
RAM Disk
Also called a virtual disk, the RAM disk is an area of RAM that is used
to simulate an additional hard disk. Data can be written and read
more quickly than on a hard disk, but a RAM disk loses any
information stored on it when the printer's power is turned off. The
spooling buffer is a RAM disk client if a hard disk is not available.
SCSI (Small Computer System Interface)
The printer’s SCSI port allows you to connect up to three optional
SCSI hard disks and the optional CrownCopy scanner, providing stor-
age for fonts, emulations, and other files. Hard disks are also used to
increase the amount of collation that can be accepted and provide a
secondary storage area for spooled data, while providing virtual
memory capabilities.
IDE (Integrated Drive Electronics)
The standard internal hard disk. “Integrated” refers to the fact that all
of the controller electronics are on the drive itself, so no separate
adapter card or expansion slot is required.
Volatile Memory
This type of memory is cleared when the printer is turned off. For
example, most RAM is volatile.
Non-volatile Memory
This type of memory is not lost when the printer loses power.
NV RAM
This protected form of RAM is used to store information such as your
printer’s configuration menu. Configuration options you have chosen,
such as emulations, memory settings, and input bins, are saved to
this non-volatile RAM. This information is not lost when you turn off
your printer.