Option Description
Sanitize ‒
Overwrite
The ATA and SCSI Sanitize ‒ Overwrite command instructs the drive to
overwrite all drive data in both storage and on-drive cache with zeros. This
feature is typically implemented on HDDs but is available on some SSDs.
Note that, for SSDs that support Sanitize ‒ Overwrite, in addition to all
user-accessible drive space, over-provisioned space and other space
reserved by the drive's internal controller will also be erased.
TX1 will force removal of any detected HPA/DCO/AMA configurations
prior to starting a Sanitize ‒ Overwrite wipe, except for USB connected
media. TX1 cannot remove HPA/DCO/AMA configurations for USB
connected media, which means Sanitize - Overwrite is not supported in
that situation. See the note at the bottom of this table regarding handling of
HPA/DCO/AMA configurations for USB connected media.
Note: Due to complexities associated with power cycling USB connected
drives, HPA/DCO/AMA removal is not supported for such media on TX1 at
this time, which precludes the use of Secure Erase and Sanitize wipe types. The
presence of such configurations is detected and reported in the user interface
and forensic logs for USB connected drives (as with all other drive interface
types), but they cannot be removed directly by TX1 when connected to a USB
port.
3.3.2.1 NIST 800-88r1 Compliance
In their document SP 800-88 r1: Guidelines for Media Sanitization, the National
Institute of Standards and Technology (NIST) describes two data sanitization
methods ‒ Clear and Purge. TX1 indicates compliance with these data sanitization
methods when the appropriate wipe settings are selected ‒ the compliance
checkmark turns from a dull gray outline to bold green, and the appropriate
compliance radio button becomes selected.
Conversely, selecting either the Clear or Purge radio button, when enabled, will
automatically select compliant wipe settings. TX1 can purge drives that support
conformant Sanitize commands. The Purge option is disabled if the Sanitize
command is not supported by the drive.
The screenshots below show examples of NIST Clear and NIST Purge compliant
drive wipe setups.
Chapter 3 Configuring TX1
52
OpenText™ Tableau™ Forensic TX1 Imager
ISTX240300-UGD-EN-1
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