Quoting J Alley <j.b.alley AT LMCO DOT COM>:

We are running Networker 7.3 on a Solaris 9 server, and we just installed
the NMO on a Solaris 9 server running Oracle 9i.

We have the rman backup working just fine to a single tape device.  We are
trying to make the backup use more than one tape device to improve the
backup time.  The save group parallelism is set to 0 so that the number of
tape devices needed will be determined by the number of save streams.  We
have tried changing the number of filesperset in the RMAN script, and we
tried allocating additional channels.  Nothing seems to be working.

Is anyone else running RMAN backups to multiple tape devices?  If so can
you share how you made it work?

Thanks
J

Hello,

Have you checked this option in NMO ? :

NSR_NO_MULTIPLEX is set for a specific RMAN channel, and specifies whether
multiplexing is disabled during a backup on the NetWorker device that the
RMAN channel uses. If multiplexing is disabled, no other save sets can be
written
to the device until RMAN channel is finished with it. NSR_NO_MULTIPLEX
should only be used with serial devices such as tape drive

And you may take a look at this white paper for oracle :

http://otn.oracle.com/deploy/availability/pdf/rman_performance_wp.pdf

Regards

Denis

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