1.  Check to make sure the configured Storage Unit for the backup jobs
is set to allow 2 maximum concurrent drives

2.  Depending on your NBU server OS, you may consider tuning options.
Since everyone's environment is different it is difficult to give a
scripted answer to how you should tune.  Perhaps with more information
about your environment we (this forum) would be able to offer
suggestions.

3.  Ensure that your backup policy (or backup class) is not limited to
only 1 job per class.  This will also reduce the drive usage to only 1
drive.  If you have multiple policies, this may not be the problem.

Hope this helps.

David A. Chapa * Technical Advisor, Technical Marketing * ADIC *
720.249.5836 * david.chapa AT adic DOT com

Pathlight VX - Integrated Disk-to-Tape Backup - http://www.adic.com

<<< Check out "Implementing Backup and Recovery: The Readiness Guide for
the Enterprise" on Amazon.com>>>

-----Original Message-----
From: Cecil Hypolite [mailto:chypolite AT acm DOT org] 
Sent: Tuesday, October 14, 2003 5:48 PM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Getting two drives to work under veritas netbackup
datacenter

Hi all,
I have a tape library that contains 2 sdlt drives, with each drive
capable
of 11 MB/Sec. This library is connected to the backup server. We have a
client that backups up 500 GB of data to this backup server, the backup
server and the client is on a gigabit network. When data is being backed
from the client to the server the backup rate is only around 9 MB/Sec,
and
the tape library is only using one drive to do this backup. I would like
to
use both drives during the backup so that I can get the backup rate of
both
drives combined, 18 - 22 MB/Sec. I checked the drive configuration with
the
tpconfig command and such and the drives are or seemed to be configured
correctly, also the library is configured to use 2 drives.
Any help on this will be greatly appreciated.
Cecil Hypolite

_______________________________________________
Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu