---
name: "tableau-parm"
section: "1"
platform: "linux"
package: "tableau-parm"
version: "0.2.0-6+b2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/tableau-parm"
---

# tableau-parm(1)

Tableau Write-blocking Bridge Query/Command Utility

## 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:

- FC**-r**F\[0\]

  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**:

```
FC
	tableau-parm /dev/sda
      F[0]
```

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

```
FC
	tableau-parm -r /dev/sda
      F[0]
```

## 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)