NetWorker: How to delete Data Domain System using nsradmin in offline mode

Use case:

This operation is needed when a decommissioned Data Domain cannot be deleted from NetWorker Management Console (NMC) through the standard interface. In such cases, where the graphical interface is no longer effective or applicable, this alternative method is necessary. 

Prerequisites:

• Administrator access on Windows or root access on Linux
• Completed Server Protection backup job, collect bootstrap save set details: mminfo -B
• Copy of the res folder from the NetWorker server resource database (NSRDB)
  • Linux: /nsr/res/nsrdb
  • Windows (Default): C:\Program Files\EMC NetWorker\nsr\res\nsrdb

Steps to Delete the DD System:

1. Stop NetWorker Services
   Linux: systemctl stop networker
   Windows (Run Command Prompt as Administrator): net stop nsrexecd /y
2. Verify No Stale Processes Are Running
   Linux: ps -ef | grep nsr
   Windows: tasklist | findstr nsr
   Ensure that no residual NetWorker processes are running before proceeding.
3. Make a copy of the nsrdb folder located in /nsr/res to a safer location.
4. Delete the Data Domain Device Using nsradmin
   From the command line, navigate to /nsr/res directory and run the following: 
   nsradmin -d nsrdb
   
   Once inside the nsradmin prompt, perform the following commands:
   nsradmin> . type: NSR Data Domain; name:DataDomainName
nsradmin> show name
nsradmin> print
nsradmin> delete type: NSR Data Domain; name:DataDomainName
   
   Replace DataDomainName with the name of your DD System. 
   Confirm deletion when prompted by typing yes.
   To verify successful deletion:
   nsradmin> print
   
   If deletion is successful, the message "No resources found for query" is displayed.
   Exit the nsradmin prompt by entering quit:
   nsradmin> quit

NetWorker: How to use the nsradmin command-line utility to manage NetWorker resources