Keysight Technologies N8921A - Instrument Memory

8
Instrument Memory
This section contains information on the types of memory available in your instrument. It explains
the size of memory, how it is used, its location, volatility, and the sanitization procedure.
This instrument uses a NAND Flash memory chip to retain the needed system information and
the user memory partition. The User memory partition is separate and independent so that the
sanitization procedures may be applied to only this partition on a sector by sector basis.
Summary of instrument memory – All Models
Memory Type
and Size
Is Memory user
accessible as a mass
storage device?
Writable During
Normal Operation?
Data Retained When
Powered Off?
Purpose/Contents
Data Input
Method
Location in
Instrument and
Remarks
Sanitization
Procedure
System Flash
(NAND Flash)
42 MB
No
Yes
Yes
Contains the
operating system
and instrument
firwmare
Factory
Install /
Firmware
Upgrade
IO board
No method, not
user accessible, and
contains no
application-specific
information.
User Flash
(NAND Flash)
(Agilent Flash)
79 MB
Yes
Yes
Yes
saved instrument
states, calibration
and web password
User-saved
data
IO board (same
chip as firmware
memory, but
managed
separately.
See Table 1
NAND Flash
(Agilent
Flash2)
1 MB
No
Yes
Yes
Not Used
Factory or
Service
Only
IO board (same
chip as firmware
memory, but
managed
separately
No method, not
user accessible, and
contains no
application-specific
information.
Flash
4 Mb
No
Yes
Yes
Bootloader
components that
load the operating
firmware from the
NAND flash
memory
Factory
Install
IO board (same
chip as firmware
memory, but
managed
separately
No method, not
user accessible, and
contains no
application-specific
information.