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Data Domain: Connecting to the Data Domain System with a Serial Cable

Summary: This document provides instructions for connecting to a Data Domain System using a serial cable.

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.

Instructions

A serial cable is used when a KVM is not available or the network interfaces are unreachable. In addition, Data Domain Support may require a serial connection for capturing the boot output in a log file for further analysis. This method requires physical access to the system.

Reasons a serial connection is needed:
  • The system is unresponsive.
  • A keyboard or monitor is not available.
  • A remote session must debug the Data Domain system, and the network is not working.
  • To boot the Data Domain system into Single User Mode.


Connecting to the System with a Terminal Emulator

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 on your laptop and configure the following communication settings:
Settings:
All supported models use these settings:
BAUD Rate	115200
Data Bits
8
Stop Bits	1
Parity	None
Flow Control	None
Emulation	VT-100
With the exception of DD2200, DD250,0 and older legacy models:
BAUD Rate	9600
Data Bits	8
Stop Bits	1
Parity	None
Flow Control	None
Emulation	VT-100
Note:
  • If for any reason, DD2200 or DD2500 serial connection is not established with Baud Rate 9600, reconfigure the Terminal Emulator Software (PuTTY or Microsoft HyperTerminal) with Baud rate 115200.
  • When configuring SOL on iDRAC for Mixed IP DDs (DD3300, DD6400, DD6900, DD9400, or DD9900), select Baud Rate to 115.2 kbps in Serial Over Lan settings. Follow the article: Data Domain: Using iDRAC and Serial Over Lan (SOL) on DD3300, DD6900, DD6400, DD9400, DD9900

Additional Information

Connecting to the Data Domain System with a Serial Cable

Purpose:

This document provides instructions for connecting to a Data Domain System using a serial cable. A serial cable is used when a KVM is not available or the network interfaces are unreachable. In addition, Data Domain Support may require a serial connection for capturing the boot output in a log file for further analysis. This method requires physical access to the system.

Reasons a serial connection is needed:

  • The system is unresponsive
  • A keyboard or monitor is not available.
  • A remote session must debug the Data Domain system, and the network is not working
  • To boot the Data Domain system into Single User Mode


Applies to:

  • All Data Domain Systems
  • All Software Releases
  • Serial "Null Modem" cable
  • Terminal Emulator Software


Solution:

Requirements:

  • A personal computer (or laptop device) running Terminal Emulator software (such as Microsoft HyperTerminal or PuTTY)
  • A serial null modem This hyperlink is taking you to a website outside of Dell Technologies. cable
  • Possibly a USB port extender if you do not have a nine-pin serial port.

Steps:

  1. Connect the serial null modem cable from the personal computer to the nine-pin serial port (DE9) located on the back of the Data Domain system.
  2. On the personal computer, configure the terminal software to use the correct COM port with the following settings:
  3. These settings must be configured prior to opening the session. They cannot be changed while the session is in-use!
    • Baud rate: 115200 or 9600 (depending on DD model)
    • Bits: 8
    • Parity: None
    • Stop Bits: 1
    • Flow Control: None
    • In addition to the above settings, set the Terminal Emulation type to: VT100

View this article for instructions on how to configure Microsoft's HyperTerminal: Data Domain - Configuring Microsoft's HyperTerminal (Login required)

If you do not see output, here are some things to try:

  • Reconfigure the Terminal Emulator software choosing a different communication port.
  • Try a different serial cable (null-modem).


Reference:

Affected Products

Data Domain Deduplication Storage Systems

Products

Data Domain, Data Domain Boost - Open Storage, Data Domain Deduplication Storage Systems, ES20, DD120 Appliance, DD140 Appliance, DD2200 Appliance, DD2500 Appliance, DD410 Appliance, DD4200 Appliance, DD430 Appliance, DD4500 Appliance , DD460 Appliance, DD510 Appliance, DD530 Appliance, DD560 Appliance, DD565 Appliance, DD580 Appliance, DD610 Appliance, DD630 Appliance, DD660 Appliance, DD670 Appliance, DD690 Appliance, DD860 Appliance, DD880 Appliance, DD890 Appliance, DD9500 Appliance ...
Article Properties
Article Number: 000029990
Article Type: How To
Last Modified: 27 Jun 2024
Version:  5
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