VNX: How to Create, Modify, or Verify NDMP User Settings for Backup Operations

Summary: Add Network Data Management Protocol (NDMP) user ndmp and verify settings. NDMP is enabled by default, managed using Unisphere UI.

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Instructions

Creating and Verifying NDMP User on VNX/Celerra

 

Prerequisite

Log in to the VNX/Celerra using Command-Line Interface (CLI) using the nasadmin account.

Procedure

  • List the data mover servers.
  • Check for existing NDMP users.
  • Create the NDMP user if it does not exist.
  • Verify the NDMP user creation.
  • Set the NDMP user password.
  • Confirm that the password is set.
  • Verify NDMP service parameters.

Step 1 - List data mover Servers

nas_server -listid
  
type  acl  slot  groupID  state  name
1     0    0     2        0      server_2
 

Step 2 - Check Existing NDMP Users.

/nas/sbin/server_user ALL -list server_2
  
[...output shows no ndmp user...]
 

Step 3 - Create NDMP User.

/nas/sbin/server_user server_2 -add -md5 ndmp
  
Creating new user ndmp
User ID: 1000
Group ID: 1000
Home directory: /home/ndmp/
 

Step 4 - Verify User Creation.

/nas/sbin/server_user ALL -list
  
server_2: ... (existing entries)
ndmp:!!:1000:1000::/home/ndmp/:ndmp_md5
 

Step 5 - Set NDMP User Password

/nas/sbin/server_user server_2 -passwd ndmp
  
Changing password for user ndmp
New passwd: ********
Retype new passwd: ********
 

Step 6 - Confirm Password Set.

/nas/sbin/server_user ALL -list
  
server_2: ... (existing entries)
ndmp:TUa2whZHHo8Qs:1000:1000:sxL2nIemegtVnYVahhcCUJlFf7:/home/ndmp/:ndmp_md5
 

Step 7 - Verify NDMP Service Parameters.

server_param server_2 -facility NDMP -list
  
server_2 : param_name               facility  default  current  configured  maxProtocolVersion
          NDMP                     4         4
          scsiReserve              0         0
          CDBFsinfoBufSizeInKB     1024      1024
          bufsz                    128       256        256
          convDialect              8859-1    8859-1
          concurrentDataStreams    4         4
          portRange                1024-65535 1024-65535
          includeCkptFs            1         1
          md5                      1         1
          snapTimeout              5         5
          dialect                  NDMP      NDMP
          forceRecursiveForNonDAR 0         0
          tapeSilveringStr         ts        ts
          excludeSvtlFs            1         1
          snapsure                 0         0
          v4OldTapeCompatible      1         1
Caution: The NDMP service is enabled by default on VNX and Celerra.
Note: The NDMP user can also be created or modified through the VNX/Celerra Unisphere Java UI by a VNX administrator.
 

Affected Products

Avamar Plug-in for NDMP
Article Properties
Article Number: 000189651
Article Type: How To
Last Modified: 10 Dec 2025
Version:  3
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