NAME

       tableau-parm - Tableau Write-blocking Bridge Query/Command Utility

SYNOPSIS

       tableau-parm [-r] device

DESCRIPTION

       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.

OPTIONS

       tableau-parm accepts the following parameters:

       -r     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

OUTPUT

       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.

EXAMPLES

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

            tableau-parm /dev/sda

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

            tableau-parm -r /dev/sda

BUGS

       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.

CREDITS

       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.

LICENSE

       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.

SEE ALSO

       hdparm(1) sdparm(1)