Search <book_title>...

NetBackup™ NAS Administrator's Guide

Last Published: 2025-08-12

Product(s): NetBackup (11.0.0.1)

Dell EMC VNX

General Information

This information is provided to help you use NetBackup for NDMP with a EMC VNX Network Server.

Documentation
For more information on your VNX Network Server, refer to the EMC VNX series - Configuring NDMP Backups on VNX guide, which can be downloaded from Dell's support site.

Access Configuration

To assign a user account name and password to one or more data movers

Log in to the Celerra Network Server Control Station as nasadmin and switch user to root by typing the following command:
$ su
You must use the su command. The su - command will fail.
Type the root password when prompted.
Choose one for the following methods to assign a user account and password to a data mover. Replace<movername> with the name of the data mover for which you want to assign a user account and password.
- Text method
  # /nas/sbin/server_user <movername> -add -password ndmp
  For example:
  # /nas/sbin/server_user server_2 -add -password ndmp
- MD5 password encryption method
  # /nas/sbin/server_user <movername> -add -md5 -password ndmp
  For example:
  # /nas/sbin/server_user server_2 -add -md5 -password ndmp
The output from the command that you entered should look similar to the following example, in which the data mover is server_2:
```
Creating new user ndmp
User ID: 1000
Group ID: 1000
Home directory:
Changing password for user ndmp
New passwd:
Retype new passwd:
server_2 : done
```
Enter a new password when prompted, then retype the new password to confirm it. The password you assign to the data mover can contain between six and eight characters. The user name must be ndmp. You can accept the default values for the other settings.
In the output, the two mandatory fields, User ID (UID) and Group ID (GID), are integers. The Celerra Network Server uses UNIX-style UIDs and GIDs to record the ownership of files and directories. The UID of the root user is 0.
Repeat the preceding steps for each NDMP-host data mover.

Device configuration

Tips for control and configuration:

After logging on to the Celerra Network Server Control Station, you can use the following commands:
- nas_version
  (Displays the Celerra version number.)
- server_devconfig
  (Queries the device configuration of the specified data mover.)
Make sure that the backup is created from a snapshot. See the following section:
See Specifying snapshot-based backups in an NDMP policy.

Tips for robot and media discovery:

Check that each Data Mover is recognizing the robot/media devices by entering the server_devconfig command from the Control Station.

For example, the following command queries the device configuration of the specified data mover (server_2).:

server_devconfig server_2 -list -probe -scsi -nondisks

Example output:

server_2 :
SCSI non-disk devices :
chain= 0, scsi-0
symm_id= 0 symm_type= 0
tid/lun= 15/15 type= disk val= -99 info= 52658653C310 diskerr=
-1
chain= 1, scsi-1
symm_id= 0 symm_type= 0
tid/lun= 15/15 type= disk val= -99 info= 52686043C320 diskerr=
-1
chain= 2, scsi-2 : no devices on chain
chain= 3, scsi-3
symm_id= 0 symm_type= 0
tid/lun= 0/0 type= jbox info= HP C5173-7000 3.04
tid/lun= 1/0 type= tape info= QUANTUM DLT7000 2560q`
tid/lun= 2/0 type= tape info= QUANTUM DLT7000 2560q`

Troubleshooting

EMC VNX logs are located on each data mover. For example, to access the server_2 data mover log file, enter the following at the VNX Network Server Control Station:

server_log server_2

Other

Known restrictions

The user name used with the tpconfig command must be defined as ndmp for each data mover.
While tar, dump, and vbb are all supported data types, Veritas recommends the use of dump or vbb instead of tar. Refer to the following tech note for more information:
http://www.veritas.com/docs/000095049
If you specify an incorrect path name in the NetBackup policy's Backup Selections list (file list), the entire backup fails with status code 99, "NDMP backup failure."