Dennis,

Check the /kernel/drv/st.conf for settings that may be in there and make
sure you have the appropriate ones for the DLT8000. 
Run a single test job to it and check the performance. You can create the
/usr/openv/netbackup/logs/bptm directory on the media server to log
information about the job that seems to be running slower. 
make a note of the L700e firmware and the drive microcodes and make sure the
drive microcodes match before running the test. 
Are you re-using tapes? You may want to try running to a blank tape as
opposed to one of the other tapes and see if that makes a difference as
well.

Skip

-----Original Message-----
From: Dennis Dwyer [mailto:dfdwyer AT tecoenergy DOT com]
Sent: Wednesday, November 13, 2002 3:02 PM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] L700 and Backup Performance


Environment:

Sun E450
Solaris 2.8
(3) 400MHz processors
NBU 3.4
L700 with (8) DLT8000 drives
L11000 with (8) DLT7000 drives

We recently installed an STK L700e library with the intention of replacing
the current L11000. The L11000 will remain on the floor for about five more
weeks until the tapes within expire. Currently all (16) drives are
configured (2 separate storage classes) and online however only the (8)
drives in the L700e are being used for nightly backups.

We cut over to the new drives yesterday and although last night's backups
appeared to be running OK, we had about 70 jobs that failed with a 196
because the window closed. Prior to cutting over to the new library we were
completing the same number of backups that were running last night with no
problems. In fact, we have one of the DLT7000 drives currently down so we
accomplished the backups with only (7) drives.

I guess what I want to know is are there tuning consideration associated
with adding the new L700e that I need to know about? Even though I'm only
using (8) of the (16) defined drives, should I physically disconnect (6) of
them from the old library? What else should I be looking at?

I'm not a SCSI maven nor do I know a lot about performance and tuning for
Solaris or NBU. What I do know is my backups should be finishing a little
bit sooner (maybe) since I upgraded and not taking longer.

By the way, there is no indication that the jobs that did complete have any
more data than usual.

Any information would be greatly appreciated.

Regards,
Dennis

Dennis F. Dwyer
Manager, Systems Software
Tampa Electric Company

(813) 225-5181  - Voice
(813) 275-3599  - FAX

Visit our corporate website at www.tecoenergy.com

Quote: "Time is not a test of the truth"
Translation: Just because you've always done it that way, doesn't make it
right



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