NetWorker: Testing Data Domain Device Connectivity

Summary: This KB goes over some troubleshooting steps for identifying connectivity or communication issues between NetWorker hosts and Data Domain.

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Instructions

1. Check port connectivity between the NetWorker server and Data Domain (DD) for the following ports 2049, 2051, 2052 (NFS), 111, and 3009 (management). This can be done using OS connection commands:

Linux: curl -v dd_hostname:port#
Windows (PowerShell): tnc dd_hostname -p port#
Unspecific: nsrports -t dd_hostname -p port#

[root@nw_server ~]# nsrports -t dd -p 2049
Forward lookup for dd
Query time:              0.267 sec
Canonical name (CNAME):  dd.domain.com
Address (A):             10.0.0.10
Connect to port 2049:    Succeeded (0.001 sec)

Reverse lookup for 10.0.0.10
Query time:              0.000 sec
Name:                    dd.domain.com

Additional port information is documented in: NetWorker Processes and Ports

2. Connect to the Data Domain using SSH and log in with the sysadmin account.

a. Check if the NetWorker mtree is visible on the Data Domain: mtree list 
sysadmin@dd# mtree list
Name                     Pre-Comp (GiB)   Status
----------------------   --------------   ------
/data/col1/backup                   0.0   RW
/data/col1/nw_server              312.0   RW
b. Check if the file system is running: fi st 
sysadmin@dd# fi st
The filesystem is enabled and running.
c. Check if CIFS, NFS, ddboost is enabled or not on Data domain: service_name status 
When services are running they should report
sysadmin@dd# ddboost status
DD Boost status: enabled

sysadmin@dd# cifs status
CIFS is enabled.

If a service is not running it will report.
sysadmin@dd# nfs status
The NFS system is currently not active.
Total number of NFS requests handled = 0.

d. If CIFS, ddboost, and/or NFS are not enabled, enable them: service_name enable

sysadmin@dd# nfs enable
NFS server version(s) 3 enabled.

Rerun the status command to confirm
sysadmin@dd# nfs status
The NFS system is currently active and running.
Total number of NFS requests handled = 0.
NFS server version(s) 3 enabled

3. If services needed to be enabled, attempt to mount the device after enabling the NFS service.

Additional Information

Affected Products

Data Domain, NetWorker
Article Properties
Article Number: 000048555
Article Type: How To
Last Modified: 26 Sept 2025
Version:  3
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