Security Features & Document of Volatility 21
Memory Clearing, Sanitization and Removal Procedures
Erase and Overwrite All
Erase and Overwrite All
This function performs the same actions as
Erase All
, plus it clears and
overwrites various memory types, as described below.
Memory Type
Models
Description
SRAM
(Battery- backed)
Not MXG
All addressable locations are overwritten once with random characters.
CPU Flash
All
User data is erased with flash chip block-erase commands. No overwrite
is performed. During erasure, the system files are temporarily moved to
main memory and are then restored to CPU Flash when erasure is
complete.
Extended
Persistent
Memory
(Flash)
MXG N5162A/82A only
The file system is formatted, then all addressable locations are overwritten
with random characters, and then the file system is reformatted again.
Hard Disk
ESG E4438C
All addressable locations are overwritten once with a random character.
Model
Key Sequence
MXG (Series A)
File
>
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>
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>
Erase and Overwrite All
>
Confirm Overwrite
ESG
Utility
>
Memory Catalog
>
More
>
Security
>
Erase and Overwrite All
>
Confirm Overwrite
