# Considerations for Dell EMC Isilon/PowerScale File Servers

Before adding a Dell EMC Isilon/PowerScale file server as the NAS client, review the options for the NAS client hostname:

- For NDMP LAN-free direct-to-tape (NDMP “2-way”) backups, the NAS client hostname must be one of the following:

  - Zone name of a SmartConnect zone defined on the file server containing only Backup Accelerator nodes. Using a SmartConnect zone distributes the NDMP backup load across all Backup Accelerator nodes.

  - IP address or hostname of an individual Backup Accelerator node in the file server.

- For NDMP to a MediaAgent (NDMP “3-way”) backups, the NAS client hostname must be one of the following:

  - Zone name of a SmartConnet zone defined on the file server containing one or more nodes in the cluster. Using a SmartConnect zone distributes the NDMP backup load across as many zones in the cluster as possible.

  - IP address or hostname of an individual node in the cluster.

For more information about setting up a Dell EMC Isilon/PowerScale file server, refer to the Dell EMC Isilon/PowerScale “Backup and Recovery Guide.”

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