NetVault Plug-in for NDMP 11.1 - Application Notes for NetApp ONTAP

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Troubleshooting

Common errors

Installation and configuration prerequisites

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Installation prerequisites

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Configuration prerequisites

Installation prerequisites

In addition to the installation prerequisites covered in the Quest NetVault Backup Plug‑in for NDMP User’s Guide, verify that the following requirements are met:

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Hardware requirements: For information about NetApp filers, see the NetApp website at: www.netapp.com

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Software requirements: For information about software requirements and supported filer operating systems, see the Quest NetVault Backup Compatibility Guide available at: https://support.quest.com/technical-documents

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Start the NDMP Daemon: To start the NDMP Daemon:

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At the prompt, type: ndmpd on

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Alternatively, to start the daemon automatically at boot time, open the file /etc/rc on the filer, and add: ndmpd on


	NOTE: The installation and configuration procedures are described in the Quest NetVault Backup Plug‑in for NDMP User’s Guide.

Configuration prerequisites

In addition to the configuration prerequisites covered in the Quest NetVault Backup Plug‑in for NDMP User’s Guide, verify that the following requirements are met:

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Prerequisites for running NDMP backups and restores using the Cluster Aware Backup (CAB) extension

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Prerequisites for using Clustered Data ONTAP 8.2 with NetVault Backup 10.0.1 and earlier

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User authentication in Data ONTAP 7.x-7G and 7-mode

Prerequisites for running NDMP backups and restores using the Cluster Aware Backup (CAB) extension

NDMP Cluster Aware Backup (CAB) extension enables the NDMP server to provide affinity information about volumes and tape devices to the backup application that support the CAB extension. NetVault Backup uses this affinity information to determine the data transfer path used during backup and restore operations. If a target volume and tape device are on same cluster node, a local backup or restore operation is performed; if they are on different cluster nodes, a three-way backup or restore operation is performed.

To run NDMP backup using the CAB extension, verify that the following requirements are met:

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Review the software requirements: To use the CAB extension, you require NetVault Backup 10.0.5 or later, Plug‑in for NDMP 10.0.5 or later, and NetApp Data ONTAP 8.2.2 C-Mode or later.

For information about software requirements, see the Quest NetVault Backup Compatibility Guide available at: https://support.quest.com/technical-documents

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Set the NDMP Service to Storage Virtual Machine (SVM)-scoped mode on the filer: Verify that the NDMP service is set to SVM-scoped mode. In Data ONTAP 8.1 and earlier versions, you must explicitly disable the node‑scoped mode for NDMP.

Commands:

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Verify the NDMP mode status: system services ndmp node-scope-mode status

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Disable node-scoped mode: system services ndmp node-scope-mode off

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Configure an NDMP service user account: In the SVM-scoped NDMP mode, you must use NDMP Service user account to access a storage system to perform tape backup and restore operations. You must also generate a password for the user account:

Command:

vserver services ndmp generate-password vserver <vserverName> ‑user <userName>

Example:

vserver services ndmp generate-password -vserver vs1 -user admin

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Add the Logical Interface (LIF) to the plug-in: To add the NDMP Client to the plug-in, use the IP address of the Logical Interface (LIF) and the NDMP service user account.

You can use the command network interface show to obtain information about LIFs. The availability of volumes and tape devices depends on the LIF type that you use.

Table 1. LIF type and availability of volumes and tape devices
NDMP connection LIF type	Volumes available for backup or restore	Tape Devices available for backup or restore
Cluster Management LIF	All volumes	All tape devices
Node Management LIF	All volumes hosted by the node	Tape devices connected to the node hosting the node management LIF
Data LIF	All volumes that belong to the Vserver	None

For more information about the availability of volumes and tape devices, see the Clustered Data ONTAP Data Protection Tape Backup and Recovery Guide.

Prerequisites for using Clustered Data ONTAP 8.2 with NetVault Backup 10.0.1 and earlier

NetVault Backup 10.0.1 and earlier do not support NDMP in SVM-scoped mode. If you are using NetVault Backup 10.0.1 or an earlier version with Data ONTAP 8.2 C-mode, verify that the following requirements are met:

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Set the NDMP Service to node-scoped mode: Verify that the NDMP service is set to node-scoped mode. In a new clustered Data ONTAP 8.2 installation, NDMP is in SVM-scoped mode by default.

Commands:

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Verify the NDMP mode status: system services ndmp node-scope-mode status

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Enable node-scoped mode: system services ndmp node-scope-mode on

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Configure NDMP root password on cluster nodes: In the node-scoped NDMP mode, you must use an NDMP-specific user account to access a storage system to perform tape backup and restore operations. User authentication must be configured on each node. The default user ID is root. Ensure that you change the default NDMP password associated with the root user account.

Commands:

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Set user password: system services ndmp modify -node * -clear-text false ‑user-id root -enable true

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Verify the configuration using the following command: system services ndmp show

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Create the LIF and add the LIF to the plug-in: To add the NDMP Client to the plug-in, use the IP address of the LIF and the NDMP root user account.

Example commands:

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Create the LIF: network interface create -vserver vnetapp -lif For_Backup -role cluster-mgmt -home-node vserver-01 -home-port e0d -address 192.168.0.22 -netmask 255.255.255.0

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Verify the configuration of the LIF: net int show -fields role,data,data-protocol,vserver,address,curr-node,curr-port


	NOTE: If a volume affinity changes to a different node, you must manually migrate the LIF to the node that is now hosting the volume: net int migrate -vserver vserver1 -lif For_Backup -dest-node vserver1‑02 -dest‑port e0d

User authentication in Data ONTAP 7.x-7G and 7-mode

To use the NDMP root user account for accessing the filer, set a valid password for this account. Password cannot be left blank for this user account. To use a nonroot user, verify that the account has necessary privileges to perform NDMP backups and restores.