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NetBackup™ SAN Client and Fibre Transport Guide

Last Published: 2025-11-24

Product(s): NetBackup (11.1)

Fibre Transport properties

To access this setting, in the web UI select Hosts > Host properties. Select the host. If necessary, click Connect. Then click Edit primary server, or Edit media server, or Edit client. Click Fibre Transport.

Note that any usage preferences that you configure for an individual SAN Client in Storage > SAN Clients override the Fibre Transport properties that you configure in Host properties.

See Configure SAN client usage preferences.

NetBackup Fibre Transport properties control how your Fibre Transport media servers and SAN clients use the Fibre Transport service for backups and restores. The Fibre Transport properties apply to the host type that you select, as follows:

Table: Host types for Fibre Transport properties

Host type	Description
Primary server	Global Fibre Transport properties that apply to all SAN clients.
Media server	The Fibre Transport Maximum concurrent Fibre Transport connections property applies to the Fibre Transport media server that you select.
Client	The Fibre Transport properties apply to the SAN client that you select. The default values for clients are the global property settings of the primary server. Client properties override the global Fibre Transport properties.

The Fibre Transport properties contain the following settings. All properties are not available for all hosts. In this table, the Fibre Transport device is an HBA port on a Fibre Transport media server. The port carries the backup and restore traffic. A media server may have more than one Fibre Transport device.

Table: Fibre Transport properties

Property	Description
Maximum concurrent Fibre Transport connections	This property displays only when you select a Fibre Transport media server . This property specifies the number of Fibre Transport connections to allow to the selected media server or media servers. A connection is equivalent to a job. If no value is set, NetBackup uses the following defaults: For NetBackup Appliance model 5330 and later: 32 For NetBackup Appliance model 5230 and later: 32 For NetBackup Fibre Transport media servers: 8 times the number of fast HBA ports on the media server plus 4 times the number of slow HBA ports. A fast port is 8 GB or faster, and a slow port is less than 8 GB. You can enter up to the following maximum connections for the media server or servers to use: On a Linux Fibre Transport media server host: 40. The recommended setting is 32 or fewer connections concurrently on Linux. On Linux hosts, you can increase that maximum by setting a NetBackup touch file, `NUMBER_DATA_BUFFERS_FT`. See About Linux concurrent FT connections. For NetBackup Appliance model 5330 and later: 40. For NetBackup Appliance model 5230 and later: 40. On a Solaris Fibre Transport media server host: 64. NetBackup supports 644 buffers per media server for Fibre Transport. To determine the number of buffers that each connection uses, divide 644 by the value you enter. If you have buffers per connection you see better performance for each connection.
Use defaults from the primary server configuration	This property displays only when you select a client . This property specifies that the client follow the properties as they are configured on the primary server.
Preferred	The Preferred property specifies to use an FT device if one is available within the configured wait period in minutes. If an FT device is not available after the wait period elapses, NetBackup uses a LAN connection for the operation. For the global property that is specified on the primary server, the default is Preferred.
Always	The Always property specifies that NetBackup should always use an FT device for backups and restores of SAN clients. NetBackup waits until an FT device is available before it begins the operation. However, an FT device must be active and up. If not, NetBackup uses the LAN. An FT device may not exist because none is active, none have been configured, or the SAN Client license expired.
Fail	The Fail property specifies that NetBackup should fail the job if an FT device is not active and up. If the FT devices are active but busy, NetBackup waits until a device is available and assigns the next job to the device. An FT device may not exist because none are active, none have been configured, or the SAN Client license expired.
Never	The Never property specifies that NetBackup should never use a Fibre Transport pipe for backups and restores of SAN clients. NetBackup uses a LAN connection for the backups and restores. If you specify Never for the primary server, Fibre Transport is disabled in the NetBackup environment. If you select Never, you can configure Fibre Transport usage on a per-client basis. If you specify Never for a SAN client, Fibre Transport is disabled for the client.