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Chapter 4, NetBackup Configuration 57

Notes on Offhost Backup and Frozen Images

However, for a FlashBackup class that does not contain any clients configured with a

frozen image method, the file list must specify the files(s) AND a cache partition (the

CACHE= entry). Refer to “File List and Cache” in Chapter 3 of the NetBackup 3.4

FlashBackup System Administrator’s Guide.

Multiple Data Streams

In NetBackup 4.0V, if the Allow multiple data streams class attribute is selected, all streams

must be set to Active for the backup to be successful. This means that all streams must be

able to start at the same time (no backups can be queued waiting for others to complete).

For backups, make sure that the following are set to allow the number of active streams to

be equal to or greater than the number of streams in the file list:

◆ Class attribute: Limit jobs per class

◆ Schedule setting: Media multiplexing

◆ Storage unit setting: Maximum multiplexing per drive

◆ System configuration setting: Maximum jobs per client

Note The Allow multiple data streams attribute is not supported with the Third-Party

Copy Device offhost backup method.

Multiplexing

A backup using the Third-Party Copy Device offhost backup method is incompatible with

multiplexing (the writing of two or more concurrent backup jobs to the same storage

device). To prevent multiplexing on a third-party copy backup, set Maximum multiplexing

per drive to 1 (in the Storage Unit Management utility, on the Change Storage Unit,

Storage Unit Type Properties dialog).

Raw Partition Offhost Backups

When entering a raw partition in the file list for an offhost backup, do not specify a block

device as the raw partition. NetBackup 4.0V does not support offhost backups of block

devices. Instead, specify the raw partition as a character device.

NetBackup 4.0V ServerFree Agent System Administrator's Guide for Solaris

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Seagate ST39175LW Betriebsanweisung Seite 67