Data domain: Connecting to a DD System with a Serial Cable

Summary: This document provides instructions for connecting to a Data Domain System using a Null Modem Serial cable. A serial connection is required to connect to a system to issue commands directly, in place of SSH/Telnet, or to diagnose a system if the IP connection has failed. ...

This article applies to This article does not apply to This article is not tied to any specific product. Not all product versions are identified in this article.
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Symptoms

Connecting to a Data Domain System with a Serial Connection

SYMPTOMS

  • Unable to connect to the Data Domain System with a Serial Connection
  • Data Domain System is unresponsive
  • Unable to connect to the Data Domain System over the network
  • Keyboard and monitor are not available to the Data Domain System or are unresponsive
  • A remote session is required to debug the Data Domain System, and the network is not working

 

Cause

APPLIES TO

  • All Data Domain Systems
  • All Releases

 

Resolution

Connecting to the System with a Terminal Emulator

To connect to a Data Domain system and run DD OS commands:

  1. Connect a serial cable between your laptop and the Data Domain system. If necessary, also use a USB-to-DB-9 or a USB-to-DB-9 and DB-9 to Micro-DB-9 converter cable to your laptop.

  2. Launch the terminal program (for example Putty, HyperTerm) on your laptop and configure the following communication settings:

All LEGACY DD models Setting Value
BAUD Rate 9600
Data Bits 8
Stop Bits 1
Parity None
Flow Control None
Emulation VT-100

 

DD9500/DD9800/DD9300/DD6800/DD6300/DD3300 Setting Value
BAUD Rate 115200
Data Bits 8
Stop Bits 1
Parity None
Flow Control None
Emulation VT-100
NOTE: You can get a login prompt after pressing the return key a few times. If not, you may require to check your COM-port connection settings or restart the DD System.

 

Additional Information

REFERENCE

 

Affected Products

Data Domain

Products

Data Domain, Data Domain Deduplication Storage Systems
Article Properties
Article Number: 000036441
Article Type: Solution
Last Modified: 25 Sep 2025
Version:  4
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