tableau-parm (1)

tableau-parm [-r] device

tableau-parm is designed to interact with write-blocking forensics bridges produced by Tableau, LLC. It can be used to query bridges for various bridge and device data, as well as to disable DCO regions.

tableau-parm accepts the following parameters:

\*(T<-r\*(T>

Directs tableau-parm to permanently remove a DCO, if it exists. THIS WILL MODIFY THE STATE OF THE DRIVE. USE AT YOUR OWN RISK! (It is recommended for forensics investigations, that a full drive image be taken before this command is run, and then again afterward if a DCO was detected originally.) Note: after running this, you'll need to restart the Tableau bridge for it to correctly detect the changes.

device

Required argument. Specifies the device file for the bridge/drive to be queried. This must be a device presenting SCSI emulation. Under Linux, all USB and FireWire mass storage devices behave like SCSI devices. Once a bridge and drive are plugged in and powered on, one can generally find out what the device was dynamically mapped to by running: dmesg | tail -20

tableau-parm generates simple output with one data value per line, interspersed with blank lines and section headers. This output format is subject to change.

To query a bridge which is mapped to /dev/sda:

\*(T<
	tableau-parm /dev/sda
      \*(T>

To remove a DCO from the hard drive on /dev/sda:

\*(T<
	tableau-parm -r /dev/sda
      \*(T>

Older versions of ATA and SATA Tableau firmwares didn't properly handle HPA and DCO on some types of drives. Be sure to upgrade your blockers' firmwares using the firmware update utility, version 4.2 or later, which was released on July 5, 2007.

This is not really a bug, but something to note: when a drive has both an HPA and DCO section, and the DCO is removed, the HPA is removed with it. This is how the bridge firmware works, and isn't something controlled by tableau-parm. Just something to be aware of.

Copyright (C) 2007,2009 Timothy D. Morgan

Copyright (C) 1999,2001,2006,2007 D. Gilbert

tableau-parm was written by Timothy D. Morgan using portions of SCSI example code written by D. Gilbert.

Tableau, LLC cooperated in the development of this tool by providing documentation on the proprietary SCSI interfaces and assisted in testing. Without their help, this tool would not have been possible. Tableau, LLC does not endorse or warrant this code in any way.

Please see the file "LICENSE" included with this software distribution.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License version 3 for more details.

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